﻿<?xml version="1.0" encoding="utf-8"?>
<Return xmlns="http://www.irs.gov/efile" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.irs.gov/efile" returnVersion="2019v5.1">
  <ReturnHeader binaryAttachmentCnt="0">
    <ReturnTs>2020-09-07T05:03:08-05:00</ReturnTs>
    <TaxPeriodEndDt>2019-12-31</TaxPeriodEndDt>
    <PreparerFirmGrp>
      <PreparerFirmEIN>812173134</PreparerFirmEIN>
      <PreparerFirmName>
        <BusinessNameLine1Txt>ELIOTT MORRA CPA PC</BusinessNameLine1Txt>
      </PreparerFirmName>
      <PreparerUSAddress>
        <AddressLine1Txt>85 SALEM END LANE</AddressLine1Txt>
        <CityNm>FRAMINGHAM</CityNm>
        <StateAbbreviationCd>MA</StateAbbreviationCd>
        <ZIPCd>01702</ZIPCd>
      </PreparerUSAddress>
    </PreparerFirmGrp>
    <ReturnTypeCd>990</ReturnTypeCd>
    <TaxPeriodBeginDt>2019-01-01</TaxPeriodBeginDt>
    <Filer>
      <EIN>133873765</EIN>
      <BusinessName>
        <BusinessNameLine1Txt>POLLY HILL ARBORETUM INC</BusinessNameLine1Txt>
      </BusinessName>
      <BusinessNameControlTxt>POLL</BusinessNameControlTxt>
      <PhoneNum>5086939426</PhoneNum>
      <USAddress>
        <AddressLine1Txt>809 STATE ROAD</AddressLine1Txt>
        <CityNm>WEST TISBURY</CityNm>
        <StateAbbreviationCd>MA</StateAbbreviationCd>
        <ZIPCd>02575</ZIPCd>
      </USAddress>
    </Filer>
    <BusinessOfficerGrp>
      <PersonNm>TIMOTHY BOLAND</PersonNm>
      <PersonTitleTxt>EXECUTIVE DIRECTOR</PersonTitleTxt>
      <PhoneNum>5086939426</PhoneNum>
      <SignatureDt>2020-07-30</SignatureDt>
      <DiscussWithPaidPreparerInd>1</DiscussWithPaidPreparerInd>
    </BusinessOfficerGrp>
    <PreparerPersonGrp>
      <PreparerPersonNm>ELIOTT MORRA CPA</PreparerPersonNm>
      <PTIN>P00247438</PTIN>
      <PhoneNum>6177758958</PhoneNum>
    </PreparerPersonGrp>
    <FilingSecurityInformation>
      <IPAddress>
        <IPv4AddressTxt>146.115.57.208</IPv4AddressTxt>
      </IPAddress>
      <IPDt>2020-07-30</IPDt>
      <IPTm>12:19:19</IPTm>
      <IPTimezoneCd>ED</IPTimezoneCd>
      <FilingLicenseTypeCd>P</FilingLicenseTypeCd>
      <AtSubmissionCreationDeviceId>DA39A3EE5E6B4B0D3255BFEF95601890AFD80709</AtSubmissionCreationDeviceId>
      <AtSubmissionFilingDeviceId>6A337BAE3CDFB3998ED358881B964F4F75656FDC</AtSubmissionFilingDeviceId>
    </FilingSecurityInformation>
    <TaxYr>2019</TaxYr>
    <BuildTS>2021-01-29 14:40:06Z</BuildTS>
  </ReturnHeader>
  <ReturnData documentCnt="7">
    <IRS990 documentId="RetDoc1038000001" referenceDocumentId="RetDoc1044400001">
      <PrincipalOfficerNm>TIMOTHY BOLAND</PrincipalOfficerNm>
      <GrossReceiptsAmt>8239940</GrossReceiptsAmt>
      <GroupReturnForAffiliatesInd>0</GroupReturnForAffiliatesInd>
      <Organization501c3Ind>X</Organization501c3Ind>
      <WebsiteAddressTxt>WWW.POLLYHILLARBORETUM.ORG</WebsiteAddressTxt>
      <TypeOfOrganizationCorpInd>X</TypeOfOrganizationCorpInd>
      <FormationYr>1996</FormationYr>
      <LegalDomicileStateCd>DE</LegalDomicileStateCd>
      <ActivityOrMissionDesc>CREATING AND MAINTAINING A WELL DOCUMENTED COLLECTION OF LIVING PLANTS. EDUCATING STUDENTS OF ALL AGES REGARDING THE LIVING COLLECTION. PROVIDING PUBLIC ACCESS TO THESE FACILITIES.</ActivityOrMissionDesc>
      <VotingMembersGoverningBodyCnt>8</VotingMembersGoverningBodyCnt>
      <VotingMembersIndependentCnt>8</VotingMembersIndependentCnt>
      <TotalEmployeeCnt>16</TotalEmployeeCnt>
      <TotalVolunteersCnt>200</TotalVolunteersCnt>
      <TotalGrossUBIAmt>0</TotalGrossUBIAmt>
      <NetUnrelatedBusTxblIncmAmt>1</NetUnrelatedBusTxblIncmAmt>
      <PYContributionsGrantsAmt>355223</PYContributionsGrantsAmt>
      <CYContributionsGrantsAmt>473504</CYContributionsGrantsAmt>
      <PYProgramServiceRevenueAmt>136756</PYProgramServiceRevenueAmt>
      <CYProgramServiceRevenueAmt>165454</CYProgramServiceRevenueAmt>
      <PYInvestmentIncomeAmt>628209</PYInvestmentIncomeAmt>
      <CYInvestmentIncomeAmt>399514</CYInvestmentIncomeAmt>
      <PYOtherRevenueAmt>0</PYOtherRevenueAmt>
      <CYOtherRevenueAmt>0</CYOtherRevenueAmt>
      <PYTotalRevenueAmt>1120188</PYTotalRevenueAmt>
      <CYTotalRevenueAmt>1038472</CYTotalRevenueAmt>
      <PYGrantsAndSimilarPaidAmt>0</PYGrantsAndSimilarPaidAmt>
      <CYGrantsAndSimilarPaidAmt>0</CYGrantsAndSimilarPaidAmt>
      <PYBenefitsPaidToMembersAmt>0</PYBenefitsPaidToMembersAmt>
      <CYBenefitsPaidToMembersAmt>0</CYBenefitsPaidToMembersAmt>
      <PYSalariesCompEmpBnftPaidAmt>943948</PYSalariesCompEmpBnftPaidAmt>
      <CYSalariesCompEmpBnftPaidAmt>877499</CYSalariesCompEmpBnftPaidAmt>
      <PYTotalProfFndrsngExpnsAmt>0</PYTotalProfFndrsngExpnsAmt>
      <CYTotalProfFndrsngExpnsAmt>0</CYTotalProfFndrsngExpnsAmt>
      <CYTotalFundraisingExpenseAmt>135589</CYTotalFundraisingExpenseAmt>
      <PYOtherExpensesAmt>674115</PYOtherExpensesAmt>
      <CYOtherExpensesAmt>653189</CYOtherExpensesAmt>
      <PYTotalExpensesAmt>1618063</PYTotalExpensesAmt>
      <CYTotalExpensesAmt>1530688</CYTotalExpensesAmt>
      <PYRevenuesLessExpensesAmt>-497875</PYRevenuesLessExpensesAmt>
      <CYRevenuesLessExpensesAmt>-492216</CYRevenuesLessExpensesAmt>
      <TotalAssetsBOYAmt>27204505</TotalAssetsBOYAmt>
      <TotalAssetsEOYAmt>29761777</TotalAssetsEOYAmt>
      <TotalLiabilitiesBOYAmt>29122</TotalLiabilitiesBOYAmt>
      <TotalLiabilitiesEOYAmt>18814</TotalLiabilitiesEOYAmt>
      <NetAssetsOrFundBalancesBOYAmt>27175383</NetAssetsOrFundBalancesBOYAmt>
      <NetAssetsOrFundBalancesEOYAmt>29742963</NetAssetsOrFundBalancesEOYAmt>
      <MissionDesc>THE ARBORETUM IS A PLANT SCIENCE ORGANIZATION CENTERED UPON EDUCATION, HORTICULTURE, PLANT EXPLORATION AND CONSERVATION.</MissionDesc>
      <SignificantNewProgramSrvcInd>0</SignificantNewProgramSrvcInd>
      <SignificantChangeInd>0</SignificantChangeInd>
      <ExpenseAmt>1153662</ExpenseAmt>
      <RevenueAmt>155575</RevenueAmt>
      <Desc>RESEARCH AND STUDY OF PLANTS AND OTHER ASPECTS OF GARDENING ANDHORTICULTURE PARTICULARY WITH REFERENCE TO RARE PLANTS GROWN INTHE ARBORETUM. INVITING AUTHORITES IN THE FIELD FOR CONSULTATIONAND GUIDANCE AND MAINTAINING DOCUMENTATION OF THE LIVING PLANTS.</Desc>
      <ProgSrvcAccomActy2Grp>
        <ExpenseAmt>6790</ExpenseAmt>
        <RevenueAmt>9878</RevenueAmt>
        <Desc>EDUCATING THE PUBLIC REGARDING VARIOUS PLANTS, GARDENING ANDHORTICULTURE THROUGH EDUCATIONAL SEMINARS AND LECTURES.</Desc>
      </ProgSrvcAccomActy2Grp>
      <TotalProgramServiceExpensesAmt>1160452</TotalProgramServiceExpensesAmt>
      <DescribedInSection501c3Ind referenceDocumentId="RetDoc1039100001">1</DescribedInSection501c3Ind>
      <ScheduleBRequiredInd referenceDocumentId="RetDoc1234500001">1</ScheduleBRequiredInd>
      <PoliticalCampaignActyInd>0</PoliticalCampaignActyInd>
      <LobbyingActivitiesInd>0</LobbyingActivitiesInd>
      <SubjectToProxyTaxInd>0</SubjectToProxyTaxInd>
      <DonorAdvisedFundInd referenceDocumentId="RetDoc1039900001">0</DonorAdvisedFundInd>
      <ConservationEasementsInd referenceDocumentId="RetDoc1039900001">1</ConservationEasementsInd>
      <CollectionsOfArtInd referenceDocumentId="RetDoc1039900001">0</CollectionsOfArtInd>
      <CreditCounselingInd referenceDocumentId="RetDoc1039900001">0</CreditCounselingInd>
      <DonorRstrOrQuasiEndowmentsInd>1</DonorRstrOrQuasiEndowmentsInd>
      <ReportLandBuildingEquipmentInd referenceDocumentId="RetDoc1039900001">1</ReportLandBuildingEquipmentInd>
      <ReportInvestmentsOtherSecInd referenceDocumentId="RetDoc1039900001">1</ReportInvestmentsOtherSecInd>
      <ReportProgramRelatedInvstInd referenceDocumentId="RetDoc1039900001">0</ReportProgramRelatedInvstInd>
      <ReportOtherAssetsInd referenceDocumentId="RetDoc1039900001">0</ReportOtherAssetsInd>
      <ReportOtherLiabilitiesInd referenceDocumentId="RetDoc1039900001">0</ReportOtherLiabilitiesInd>
      <IncludeFIN48FootnoteInd referenceDocumentId="RetDoc1039900001">0</IncludeFIN48FootnoteInd>
      <IndependentAuditFinclStmtInd referenceDocumentId="RetDoc1039900001">1</IndependentAuditFinclStmtInd>
      <ConsolidatedAuditFinclStmtInd referenceDocumentId="RetDoc1039900001">0</ConsolidatedAuditFinclStmtInd>
      <SchoolOperatingInd>0</SchoolOperatingInd>
      <ForeignOfficeInd>0</ForeignOfficeInd>
      <ForeignActivitiesInd>0</ForeignActivitiesInd>
      <MoreThan5000KToOrgInd>0</MoreThan5000KToOrgInd>
      <MoreThan5000KToIndividualsInd>0</MoreThan5000KToIndividualsInd>
      <ProfessionalFundraisingInd>0</ProfessionalFundraisingInd>
      <FundraisingActivitiesInd>0</FundraisingActivitiesInd>
      <GamingActivitiesInd>0</GamingActivitiesInd>
      <OperateHospitalInd>0</OperateHospitalInd>
      <GrantsToOrganizationsInd>0</GrantsToOrganizationsInd>
      <GrantsToIndividualsInd>0</GrantsToIndividualsInd>
      <ScheduleJRequiredInd referenceDocumentId="RetDoc1042400001">1</ScheduleJRequiredInd>
      <TaxExemptBondsInd>0</TaxExemptBondsInd>
      <EngagedInExcessBenefitTransInd referenceDocumentId="RetDoc1042800001">0</EngagedInExcessBenefitTransInd>
      <PYExcessBenefitTransInd referenceDocumentId="RetDoc1042800001">0</PYExcessBenefitTransInd>
      <LoanOutstandingInd referenceDocumentId="RetDoc1042800001">1</LoanOutstandingInd>
      <GrantToRelatedPersonInd referenceDocumentId="RetDoc1042800001">0</GrantToRelatedPersonInd>
      <BusinessRlnWithOrgMemInd referenceDocumentId="RetDoc1042800001">0</BusinessRlnWithOrgMemInd>
      <BusinessRlnWithFamMemInd referenceDocumentId="RetDoc1042800001">0</BusinessRlnWithFamMemInd>
      <BusinessRlnWith35CtrlEntInd>0</BusinessRlnWith35CtrlEntInd>
      <DeductibleNonCashContriInd>0</DeductibleNonCashContriInd>
      <DeductibleArtContributionInd>0</DeductibleArtContributionInd>
      <TerminateOperationsInd>0</TerminateOperationsInd>
      <PartialLiquidationInd>0</PartialLiquidationInd>
      <DisregardedEntityInd>0</DisregardedEntityInd>
      <RelatedEntityInd>0</RelatedEntityInd>
      <RelatedOrganizationCtrlEntInd>0</RelatedOrganizationCtrlEntInd>
      <TrnsfrExmptNonChrtblRltdOrgInd>0</TrnsfrExmptNonChrtblRltdOrgInd>
      <ActivitiesConductedPrtshpInd>0</ActivitiesConductedPrtshpInd>
      <ScheduleORequiredInd>1</ScheduleORequiredInd>
      <InfoInScheduleOPartVInd>X</InfoInScheduleOPartVInd>
      <IRPDocumentCnt>0</IRPDocumentCnt>
      <IRPDocumentW2GCnt>0</IRPDocumentW2GCnt>
      <EmployeeCnt>16</EmployeeCnt>
      <EmploymentTaxReturnsFiledInd>0</EmploymentTaxReturnsFiledInd>
      <UnrelatedBusIncmOverLimitInd>0</UnrelatedBusIncmOverLimitInd>
      <ForeignFinancialAccountInd>0</ForeignFinancialAccountInd>
      <ProhibitedTaxShelterTransInd>0</ProhibitedTaxShelterTransInd>
      <TaxablePartyNotificationInd>0</TaxablePartyNotificationInd>
      <NondeductibleContributionsInd>0</NondeductibleContributionsInd>
      <QuidProQuoContributionsInd>0</QuidProQuoContributionsInd>
      <Form8282PropertyDisposedOfInd>0</Form8282PropertyDisposedOfInd>
      <IndoorTanningServicesInd>0</IndoorTanningServicesInd>
      <SubjToTaxRmnrtnExPrchtPymtInd>0</SubjToTaxRmnrtnExPrchtPymtInd>
      <SubjectToExcsTaxNetInvstIncInd>0</SubjectToExcsTaxNetInvstIncInd>
      <InfoInScheduleOPartVIInd>X</InfoInScheduleOPartVIInd>
      <GoverningBodyVotingMembersCnt>8</GoverningBodyVotingMembersCnt>
      <IndependentVotingMemberCnt>8</IndependentVotingMemberCnt>
      <FamilyOrBusinessRlnInd>0</FamilyOrBusinessRlnInd>
      <DelegationOfMgmtDutiesInd>0</DelegationOfMgmtDutiesInd>
      <ChangeToOrgDocumentsInd>0</ChangeToOrgDocumentsInd>
      <MaterialDiversionOrMisuseInd>0</MaterialDiversionOrMisuseInd>
      <MembersOrStockholdersInd>0</MembersOrStockholdersInd>
      <ElectionOfBoardMembersInd>0</ElectionOfBoardMembersInd>
      <DecisionsSubjectToApprovaInd>0</DecisionsSubjectToApprovaInd>
      <MinutesOfGoverningBodyInd>1</MinutesOfGoverningBodyInd>
      <MinutesOfCommitteesInd>1</MinutesOfCommitteesInd>
      <OfficerMailingAddressInd>0</OfficerMailingAddressInd>
      <LocalChaptersInd>0</LocalChaptersInd>
      <Form990ProvidedToGvrnBodyInd>1</Form990ProvidedToGvrnBodyInd>
      <ConflictOfInterestPolicyInd>1</ConflictOfInterestPolicyInd>
      <AnnualDisclosureCoveredPrsnInd>1</AnnualDisclosureCoveredPrsnInd>
      <RegularMonitoringEnfrcInd>1</RegularMonitoringEnfrcInd>
      <WhistleblowerPolicyInd>1</WhistleblowerPolicyInd>
      <DocumentRetentionPolicyInd>1</DocumentRetentionPolicyInd>
      <CompensationProcessCEOInd>1</CompensationProcessCEOInd>
      <CompensationProcessOtherInd>1</CompensationProcessOtherInd>
      <InvestmentInJointVentureInd>0</InvestmentInJointVentureInd>
      <StatesWhereCopyOfReturnIsFldCd>MA</StatesWhereCopyOfReturnIsFldCd>
      <UponRequestInd>X</UponRequestInd>
      <BooksInCareOfDetail>
        <BusinessName>
          <BusinessNameLine1Txt>MARGO URBANY-JOYCE</BusinessNameLine1Txt>
        </BusinessName>
        <PhoneNum>5086939426</PhoneNum>
        <USAddress>
          <AddressLine1Txt>809 STATE ROAD</AddressLine1Txt>
          <CityNm>WEST TISBURY</CityNm>
          <StateAbbreviationCd>MA</StateAbbreviationCd>
          <ZIPCd>02575</ZIPCd>
        </USAddress>
      </BooksInCareOfDetail>
      <NoListedPersonsCompensatedInd>X</NoListedPersonsCompensatedInd>
      <Form990PartVIISectionAGrp>
        <PersonNm>SANFORD BROWN</PersonNm>
        <TitleTxt>DIRECTOR</TitleTxt>
        <AverageHoursPerWeekRt>1.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>DENNIS BUSHE</PersonNm>
        <TitleTxt>DIRECTOR</TitleTxt>
        <AverageHoursPerWeekRt>1.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>PAMELA KOHLBERG</PersonNm>
        <TitleTxt>DIRECTOR</TitleTxt>
        <AverageHoursPerWeekRt>1.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>CLAIRE SAWYERS</PersonNm>
        <TitleTxt>DIRECTOR</TitleTxt>
        <AverageHoursPerWeekRt>1.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>E DOUGLAS SEDERHOLM</PersonNm>
        <TitleTxt>DIRECTOR</TitleTxt>
        <AverageHoursPerWeekRt>1.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>SUSAN WASSERMAN</PersonNm>
        <TitleTxt>DIRECTOR,CO-CHAIR,SECRETAR</TitleTxt>
        <AverageHoursPerWeekRt>1.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <OfficerInd>X</OfficerInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>GARY MONTROWL</PersonNm>
        <TitleTxt>DIRECTOR,CO-CHAIR,TREASURE</TitleTxt>
        <AverageHoursPerWeekRt>1.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <OfficerInd>X</OfficerInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>DR MURPHY WESTWOOD</PersonNm>
        <TitleTxt>DIRECTOR</TitleTxt>
        <AverageHoursPerWeekRt>1.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>TIMOTHY BOLAND</PersonNm>
        <TitleTxt>EXECUTIVE DIRECTOR</TitleTxt>
        <AverageHoursPerWeekRt>40.00</AverageHoursPerWeekRt>
        <KeyEmployeeInd>X</KeyEmployeeInd>
        <ReportableCompFromOrgAmt>204451</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>42617</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <TotalReportableCompFromOrgAmt>204451</TotalReportableCompFromOrgAmt>
      <TotReportableCompRltdOrgAmt>0</TotReportableCompRltdOrgAmt>
      <TotalOtherCompensationAmt>42617</TotalOtherCompensationAmt>
      <IndivRcvdGreaterThan100KCnt>1</IndivRcvdGreaterThan100KCnt>
      <FormerOfcrEmployeesListedInd>0</FormerOfcrEmployeesListedInd>
      <TotalCompGreaterThan150KInd>1</TotalCompGreaterThan150KInd>
      <CompensationFromOtherSrcsInd>0</CompensationFromOtherSrcsInd>
      <CntrctRcvdGreaterThan100KCnt>0</CntrctRcvdGreaterThan100KCnt>
      <AllOtherContributionsAmt>473504</AllOtherContributionsAmt>
      <TotalContributionsAmt>473504</TotalContributionsAmt>
      <ProgramServiceRevenueGrp>
        <Desc>MEMBERSHIPS</Desc>
        <BusinessCd>900099</BusinessCd>
        <TotalRevenueColumnAmt>98190</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>98190</RelatedOrExemptFuncIncomeAmt>
      </ProgramServiceRevenueGrp>
      <ProgramServiceRevenueGrp>
        <Desc>OTHER</Desc>
        <BusinessCd>900099</BusinessCd>
        <TotalRevenueColumnAmt>67264</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>67264</RelatedOrExemptFuncIncomeAmt>
      </ProgramServiceRevenueGrp>
      <TotalProgramServiceRevenueAmt>165454</TotalProgramServiceRevenueAmt>
      <InvestmentIncomeGrp>
        <TotalRevenueColumnAmt>513702</TotalRevenueColumnAmt>
        <ExclusionAmt>513702</ExclusionAmt>
      </InvestmentIncomeGrp>
      <GrossAmountSalesAssetsGrp>
        <SecuritiesAmt>7087280</SecuritiesAmt>
      </GrossAmountSalesAssetsGrp>
      <LessCostOthBasisSalesExpnssGrp>
        <SecuritiesAmt>7201468</SecuritiesAmt>
      </LessCostOthBasisSalesExpnssGrp>
      <GainOrLossGrp>
        <SecuritiesAmt>-114188</SecuritiesAmt>
      </GainOrLossGrp>
      <NetGainOrLossInvestmentsGrp>
        <TotalRevenueColumnAmt>-114188</TotalRevenueColumnAmt>
        <ExclusionAmt>-114188</ExclusionAmt>
      </NetGainOrLossInvestmentsGrp>
      <TotalRevenueGrp>
        <TotalRevenueColumnAmt>1038472</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>165454</RelatedOrExemptFuncIncomeAmt>
        <UnrelatedBusinessRevenueAmt>0</UnrelatedBusinessRevenueAmt>
        <ExclusionAmt>399514</ExclusionAmt>
      </TotalRevenueGrp>
      <CompCurrentOfcrDirectorsGrp>
        <TotalAmt>204451</TotalAmt>
        <ProgramServicesAmt>102226</ProgramServicesAmt>
        <ManagementAndGeneralAmt>51113</ManagementAndGeneralAmt>
        <FundraisingAmt>51112</FundraisingAmt>
      </CompCurrentOfcrDirectorsGrp>
      <OtherSalariesAndWagesGrp>
        <TotalAmt>463762</TotalAmt>
        <ProgramServicesAmt>373088</ProgramServicesAmt>
        <ManagementAndGeneralAmt>61505</ManagementAndGeneralAmt>
        <FundraisingAmt>29169</FundraisingAmt>
      </OtherSalariesAndWagesGrp>
      <OtherEmployeeBenefitsGrp>
        <TotalAmt>152762</TotalAmt>
        <ProgramServicesAmt>118695</ProgramServicesAmt>
        <ManagementAndGeneralAmt>17659</ManagementAndGeneralAmt>
        <FundraisingAmt>16408</FundraisingAmt>
      </OtherEmployeeBenefitsGrp>
      <PayrollTaxesGrp>
        <TotalAmt>56524</TotalAmt>
        <ProgramServicesAmt>42810</ProgramServicesAmt>
        <ManagementAndGeneralAmt>8181</ManagementAndGeneralAmt>
        <FundraisingAmt>5533</FundraisingAmt>
      </PayrollTaxesGrp>
      <FeesForServicesOtherGrp>
        <TotalAmt>53107</TotalAmt>
        <ProgramServicesAmt>11439</ProgramServicesAmt>
        <ManagementAndGeneralAmt>41177</ManagementAndGeneralAmt>
        <FundraisingAmt>491</FundraisingAmt>
      </FeesForServicesOtherGrp>
      <AdvertisingGrp>
        <TotalAmt>31931</TotalAmt>
        <ProgramServicesAmt>31931</ProgramServicesAmt>
      </AdvertisingGrp>
      <TravelGrp>
        <TotalAmt>5604</TotalAmt>
        <ProgramServicesAmt>5604</ProgramServicesAmt>
      </TravelGrp>
      <DepreciationDepletionGrp>
        <TotalAmt>163377</TotalAmt>
        <ProgramServicesAmt>142788</ProgramServicesAmt>
        <ManagementAndGeneralAmt>14406</ManagementAndGeneralAmt>
        <FundraisingAmt>6183</FundraisingAmt>
      </DepreciationDepletionGrp>
      <InsuranceGrp>
        <TotalAmt>75605</TotalAmt>
        <ProgramServicesAmt>66239</ProgramServicesAmt>
        <ManagementAndGeneralAmt>6253</ManagementAndGeneralAmt>
        <FundraisingAmt>3113</FundraisingAmt>
      </InsuranceGrp>
      <OtherExpensesGrp>
        <Desc>MAINTENANCE AND REPAIRS</Desc>
        <TotalAmt>169348</TotalAmt>
        <ProgramServicesAmt>140988</ProgramServicesAmt>
        <ManagementAndGeneralAmt>19852</ManagementAndGeneralAmt>
        <FundraisingAmt>8508</FundraisingAmt>
      </OtherExpensesGrp>
      <OtherExpensesGrp>
        <Desc>PRINTING AND PUBLICATIO</Desc>
        <TotalAmt>37387</TotalAmt>
        <ProgramServicesAmt>25015</ProgramServicesAmt>
        <ManagementAndGeneralAmt>4620</ManagementAndGeneralAmt>
        <FundraisingAmt>7752</FundraisingAmt>
      </OtherExpensesGrp>
      <OtherExpensesGrp>
        <Desc>SUPPLIES</Desc>
        <TotalAmt>28234</TotalAmt>
        <ProgramServicesAmt>27814</ProgramServicesAmt>
        <ManagementAndGeneralAmt>242</ManagementAndGeneralAmt>
        <FundraisingAmt>178</FundraisingAmt>
      </OtherExpensesGrp>
      <OtherExpensesGrp>
        <Desc>EDUCATION AND CONFERENC</Desc>
        <TotalAmt>27732</TotalAmt>
        <ProgramServicesAmt>24460</ProgramServicesAmt>
        <ManagementAndGeneralAmt>1886</ManagementAndGeneralAmt>
        <FundraisingAmt>1386</FundraisingAmt>
      </OtherExpensesGrp>
      <AllOtherExpensesGrp>
        <TotalAmt>60864</TotalAmt>
        <ProgramServicesAmt>47355</ProgramServicesAmt>
        <ManagementAndGeneralAmt>7753</ManagementAndGeneralAmt>
        <FundraisingAmt>5756</FundraisingAmt>
      </AllOtherExpensesGrp>
      <TotalFunctionalExpensesGrp>
        <TotalAmt>1530688</TotalAmt>
        <ProgramServicesAmt>1160452</ProgramServicesAmt>
        <ManagementAndGeneralAmt>234647</ManagementAndGeneralAmt>
        <FundraisingAmt>135589</FundraisingAmt>
      </TotalFunctionalExpensesGrp>
      <SavingsAndTempCashInvstGrp>
        <BOYAmt>150443</BOYAmt>
        <EOYAmt>212101</EOYAmt>
      </SavingsAndTempCashInvstGrp>
      <PledgesAndGrantsReceivableGrp>
        <BOYAmt>146119</BOYAmt>
        <EOYAmt>81931</EOYAmt>
      </PledgesAndGrantsReceivableGrp>
      <ReceivablesFromOfficersEtcGrp>
        <BOYAmt>504979</BOYAmt>
        <EOYAmt>462001</EOYAmt>
      </ReceivablesFromOfficersEtcGrp>
      <InventoriesForSaleOrUseGrp>
        <BOYAmt>3980</BOYAmt>
        <EOYAmt>3980</EOYAmt>
      </InventoriesForSaleOrUseGrp>
      <PrepaidExpensesDefrdChargesGrp>
        <BOYAmt>30000</BOYAmt>
        <EOYAmt>30000</EOYAmt>
      </PrepaidExpensesDefrdChargesGrp>
      <LandBldgEquipCostOrOtherBssAmt>7849060</LandBldgEquipCostOrOtherBssAmt>
      <LandBldgEquipAccumDeprecAmt>2271554</LandBldgEquipAccumDeprecAmt>
      <LandBldgEquipBasisNetGrp>
        <BOYAmt>5683618</BOYAmt>
        <EOYAmt>5577506</EOYAmt>
      </LandBldgEquipBasisNetGrp>
      <InvestmentsPubTradedSecGrp>
        <BOYAmt>18725113</BOYAmt>
        <EOYAmt>20720934</EOYAmt>
      </InvestmentsPubTradedSecGrp>
      <InvestmentsOtherSecuritiesGrp>
        <BOYAmt>1960253</BOYAmt>
        <EOYAmt>2673324</EOYAmt>
      </InvestmentsOtherSecuritiesGrp>
      <TotalAssetsGrp>
        <BOYAmt>27204505</BOYAmt>
        <EOYAmt>29761777</EOYAmt>
      </TotalAssetsGrp>
      <AccountsPayableAccrExpnssGrp>
        <BOYAmt>29122</BOYAmt>
        <EOYAmt>18814</EOYAmt>
      </AccountsPayableAccrExpnssGrp>
      <TotalLiabilitiesGrp>
        <BOYAmt>29122</BOYAmt>
        <EOYAmt>18814</EOYAmt>
      </TotalLiabilitiesGrp>
      <OrganizationFollowsFASB117Ind>X</OrganizationFollowsFASB117Ind>
      <NoDonorRestrictionNetAssetsGrp>
        <BOYAmt>7947146</BOYAmt>
        <EOYAmt>8637281</EOYAmt>
      </NoDonorRestrictionNetAssetsGrp>
      <DonorRestrictionNetAssetsGrp>
        <BOYAmt>19228237</BOYAmt>
        <EOYAmt>21105682</EOYAmt>
      </DonorRestrictionNetAssetsGrp>
      <TotalNetAssetsFundBalanceGrp>
        <BOYAmt>27175383</BOYAmt>
        <EOYAmt>29742963</EOYAmt>
      </TotalNetAssetsFundBalanceGrp>
      <TotLiabNetAssetsFundBalanceGrp>
        <BOYAmt>27204505</BOYAmt>
        <EOYAmt>29761777</EOYAmt>
      </TotLiabNetAssetsFundBalanceGrp>
      <ReconcilationRevenueExpnssAmt>-492216</ReconcilationRevenueExpnssAmt>
      <NetUnrlzdGainsLossesInvstAmt>3184079</NetUnrlzdGainsLossesInvstAmt>
      <InvestmentExpenseAmt>-124283</InvestmentExpenseAmt>
      <OtherChangesInNetAssetsAmt>0</OtherChangesInNetAssetsAmt>
      <MethodOfAccountingAccrualInd>X</MethodOfAccountingAccrualInd>
      <AccountantCompileOrReviewInd>0</AccountantCompileOrReviewInd>
      <FSAuditedInd>1</FSAuditedInd>
      <FSAuditedBasisGrp>
        <SeparateBasisFinclStmtInd>X</SeparateBasisFinclStmtInd>
      </FSAuditedBasisGrp>
      <AuditCommitteeInd>1</AuditCommitteeInd>
      <FederalGrantAuditRequiredInd>0</FederalGrantAuditRequiredInd>
    </IRS990>
    <IRS990ScheduleA documentId="RetDoc1039100001">
      <PublicOrganization170Ind>X</PublicOrganization170Ind>
      <GiftsGrantsContriRcvd170Grp>
        <CurrentTaxYearMinus4YearsAmt>843940</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>1352981</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>621579</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>429306</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>571694</CurrentTaxYearAmt>
        <TotalAmt>3819500</TotalAmt>
      </GiftsGrantsContriRcvd170Grp>
      <TotalCalendarYear170Grp>
        <CurrentTaxYearMinus4YearsAmt>843940</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>1352981</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>621579</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>429306</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>571694</CurrentTaxYearAmt>
        <TotalAmt>3819500</TotalAmt>
      </TotalCalendarYear170Grp>
      <SubstantialContributorsTotAmt>1167674</SubstantialContributorsTotAmt>
      <PublicSupportTotal170Amt>2651826</PublicSupportTotal170Amt>
      <GrossInvestmentIncome170Grp>
        <CurrentTaxYearMinus4YearsAmt>246233</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>273984</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>356048</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>598667</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>513712</CurrentTaxYearAmt>
        <TotalAmt>1988644</TotalAmt>
      </GrossInvestmentIncome170Grp>
      <TotalSupportAmt>5808144</TotalSupportAmt>
      <GrossReceiptsRltdActivitiesAmt>470231</GrossReceiptsRltdActivitiesAmt>
      <PublicSupportCY170Pct>0.45660</PublicSupportCY170Pct>
      <PublicSupportPY170Pct>0.46400</PublicSupportPY170Pct>
      <ThirtyThrPctSuprtTestsCY170Ind>X</ThirtyThrPctSuprtTestsCY170Ind>
    </IRS990ScheduleA>
    <IRS990ScheduleB documentId="RetDoc1234500001">
      <ContributorInformationGrp>
        <ContributorNum>RESTRICTED</ContributorNum>
        <ContributorBusinessName>
          <BusinessNameLine1>RESTRICTED</BusinessNameLine1>
        </ContributorBusinessName>
        <ContributorUSAddress>
          <AddressLine1>RESTRICTED</AddressLine1>
          <AddressLine2>RESTRICTED</AddressLine2>
          <City>RESTRICTED</City>
          <State>RESTRICTED</State>
          <ZIPCode>RESTRICTED</ZIPCode>
        </ContributorUSAddress>
        <TotalContributionsAmt>RESTRICTED</TotalContributionsAmt>
      </ContributorInformationGrp>
    </IRS990ScheduleB>
    <IRS990ScheduleD documentId="RetDoc1039900001">
      <PreservationPublicUseInd>X</PreservationPublicUseInd>
      <ProtectionNaturalHabitatInd>X</ProtectionNaturalHabitatInd>
      <PreservationOpenSpaceInd>X</PreservationOpenSpaceInd>
      <TotalEasementsCnt>1</TotalEasementsCnt>
      <TotalAcreageCnt>60.00</TotalAcreageCnt>
      <StatesEasementsHeldCnt>1</StatesEasementsHeldCnt>
      <WrittenPolicyMonitoringInd>1</WrittenPolicyMonitoringInd>
      <StaffHoursSpentEnforcementCnt>1.00</StaffHoursSpentEnforcementCnt>
      <CYEndwmtFundGrp>
        <BeginningYearBalanceAmt>20063579</BeginningYearBalanceAmt>
        <InvestmentEarningsOrLossesAmt>3188422</InvestmentEarningsOrLossesAmt>
        <OtherExpendituresAmt>906264</OtherExpendituresAmt>
        <EndYearBalanceAmt>22345737</EndYearBalanceAmt>
      </CYEndwmtFundGrp>
      <CYMinus1YrEndwmtFundGrp>
        <BeginningYearBalanceAmt>21967880</BeginningYearBalanceAmt>
        <InvestmentEarningsOrLossesAmt>-1081613</InvestmentEarningsOrLossesAmt>
        <OtherExpendituresAmt>822688</OtherExpendituresAmt>
        <EndYearBalanceAmt>20063579</EndYearBalanceAmt>
      </CYMinus1YrEndwmtFundGrp>
      <CYMinus2YrEndwmtFundGrp>
        <BeginningYearBalanceAmt>19551958</BeginningYearBalanceAmt>
        <InvestmentEarningsOrLossesAmt>3172134</InvestmentEarningsOrLossesAmt>
        <OtherExpendituresAmt>756212</OtherExpendituresAmt>
        <EndYearBalanceAmt>21967880</EndYearBalanceAmt>
      </CYMinus2YrEndwmtFundGrp>
      <CYMinus3YrEndwmtFundGrp>
        <BeginningYearBalanceAmt>19336794</BeginningYearBalanceAmt>
        <ContributionsAmt>578476</ContributionsAmt>
        <InvestmentEarningsOrLossesAmt>418137</InvestmentEarningsOrLossesAmt>
        <OtherExpendituresAmt>781449</OtherExpendituresAmt>
        <EndYearBalanceAmt>19551958</EndYearBalanceAmt>
      </CYMinus3YrEndwmtFundGrp>
      <CYMinus4YrEndwmtFundGrp>
        <BeginningYearBalanceAmt>19520289</BeginningYearBalanceAmt>
        <InvestmentEarningsOrLossesAmt>470541</InvestmentEarningsOrLossesAmt>
        <OtherExpendituresAmt>654036</OtherExpendituresAmt>
        <EndYearBalanceAmt>19336794</EndYearBalanceAmt>
      </CYMinus4YrEndwmtFundGrp>
      <BoardDesignatedBalanceEOYPct>0.08000</BoardDesignatedBalanceEOYPct>
      <TermEndowmentBalanceEOYPct>0.92000</TermEndowmentBalanceEOYPct>
      <EndowmentsHeldUnrelatedOrgInd>0</EndowmentsHeldUnrelatedOrgInd>
      <EndowmentsHeldRelatedOrgInd>0</EndowmentsHeldRelatedOrgInd>
      <LandGrp>
        <OtherCostOrOtherBasisAmt>2377232</OtherCostOrOtherBasisAmt>
        <BookValueAmt>2377232</BookValueAmt>
      </LandGrp>
      <BuildingsGrp>
        <OtherCostOrOtherBasisAmt>4945981</OtherCostOrOtherBasisAmt>
        <DepreciationAmt>1813680</DepreciationAmt>
        <BookValueAmt>3132301</BookValueAmt>
      </BuildingsGrp>
      <EquipmentGrp>
        <OtherCostOrOtherBasisAmt>373332</OtherCostOrOtherBasisAmt>
        <DepreciationAmt>318246</DepreciationAmt>
        <BookValueAmt>55086</BookValueAmt>
      </EquipmentGrp>
      <OtherLandBuildingsGrp>
        <OtherCostOrOtherBasisAmt>152515</OtherCostOrOtherBasisAmt>
        <DepreciationAmt>139628</DepreciationAmt>
        <BookValueAmt>12887</BookValueAmt>
      </OtherLandBuildingsGrp>
      <TotalBookValueLandBuildingsAmt>5577506</TotalBookValueLandBuildingsAmt>
      <OtherSecuritiesGrp>
        <Desc>ENDOWMENT LTD PARTNERSHIP</Desc>
        <BookValueAmt>2673324</BookValueAmt>
        <MethodValuationCd>F</MethodValuationCd>
      </OtherSecuritiesGrp>
      <TotalBookValueSecuritiesAmt>2673324</TotalBookValueSecuritiesAmt>
      <TotalRevEtcAuditedFinclStmtAmt>4098267</TotalRevEtcAuditedFinclStmtAmt>
      <NetUnrealizedGainsInvstAmt>3184079</NetUnrealizedGainsInvstAmt>
      <RevenueNotReportedAmt>3184079</RevenueNotReportedAmt>
      <RevenueSubtotalAmt>914188</RevenueSubtotalAmt>
      <InvestmentExpensesNotIncldAmt>124283</InvestmentExpensesNotIncldAmt>
      <RevenueNotReportedFinclStmtAmt>124283</RevenueNotReportedFinclStmtAmt>
      <TotalRevenuePerForm990Amt>1038471</TotalRevenuePerForm990Amt>
      <TotExpnsEtcAuditedFinclStmtAmt>0</TotExpnsEtcAuditedFinclStmtAmt>
      <ExpensesNotReportedAmt>0</ExpensesNotReportedAmt>
      <ExpensesSubtotalAmt>0</ExpensesSubtotalAmt>
      <ExpensesNotRptFinclStmtAmt>0</ExpensesNotRptFinclStmtAmt>
      <TotalExpensesPerForm990Amt>0</TotalExpensesPerForm990Amt>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, SCHEDULE D, PART II, LINE 9</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ARBORETUM ACCOUNTED FOR THE PROCEEDS AS REVENUE IN THE YEAR THE EASEMENT WAS RECEIVED.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleD>
    <IRS990ScheduleJ documentId="RetDoc1042400001">
      <CompensationCommitteeInd>X</CompensationCommitteeInd>
      <Form990OfOtherOrganizationsInd>X</Form990OfOtherOrganizationsInd>
      <WrittenEmploymentContractInd>X</WrittenEmploymentContractInd>
      <CompensationSurveyInd>X</CompensationSurveyInd>
      <BoardOrCommitteeApprovalInd>X</BoardOrCommitteeApprovalInd>
      <SeverancePaymentInd>0</SeverancePaymentInd>
      <SupplementalNonqualRtrPlanInd>0</SupplementalNonqualRtrPlanInd>
      <EquityBasedCompArrngmInd>0</EquityBasedCompArrngmInd>
      <CompBasedOnRevenueOfFlngOrgInd>0</CompBasedOnRevenueOfFlngOrgInd>
      <CompBsdOnRevRelatedOrgsInd>0</CompBsdOnRevRelatedOrgsInd>
      <CompBsdNetEarnsFlngOrgInd>0</CompBsdNetEarnsFlngOrgInd>
      <CompBsdNetEarnsRltdOrgsInd>0</CompBsdNetEarnsRltdOrgsInd>
      <AnyNonFixedPaymentsInd>0</AnyNonFixedPaymentsInd>
      <InitialContractExceptionInd>0</InitialContractExceptionInd>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>TIMOTHY BOLAND</PersonNm>
        <TitleTxt>EXECUTIVE DIRECTOR</TitleTxt>
        <BaseCompensationFilingOrgAmt>204451</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>0</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>42617</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>247068</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
    </IRS990ScheduleJ>
    <IRS990ScheduleL documentId="RetDoc1042800001">
      <LoansBtwnOrgInterestedPrsnGrp>
        <PersonNm>TIMOTHY BOLAND</PersonNm>
        <RelationshipWithOrgTxt>EXECUTIVE DIRECTOR</RelationshipWithOrgTxt>
        <LoanPurposeTxt>MORTGAGE ON RESIDENCE</LoanPurposeTxt>
        <LoanFromOrganizationInd>X</LoanFromOrganizationInd>
        <OriginalPrincipalAmt>651792</OriginalPrincipalAmt>
        <BalanceDueAmt>462001</BalanceDueAmt>
        <DefaultInd>0</DefaultInd>
        <BoardOrCommitteeApprovalInd>1</BoardOrCommitteeApprovalInd>
        <WrittenAgreementInd>1</WrittenAgreementInd>
      </LoansBtwnOrgInterestedPrsnGrp>
      <TotalBalanceDueAmt>462001</TotalBalanceDueAmt>
    </IRS990ScheduleL>
    <IRS990ScheduleO documentId="RetDoc1044400001">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>990, PART V, LINE 3B</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ARBORETUM HAS NOT FILED THE FORM 990T AS OF THE FILING OF THIS FORM 990, BUT WILL DO SO PRIOR TO THE DUE DATE OF THE FORM 990T. THE ARBORETUM MAY NOT RECEIVE THE K-1 WHICH WILL INCLUDE THE UBTI INFORMAITON UNTIL AFTER THE EXTENDED DUE DATE OF THE FORM 990. WHEN THAT OCCURS THE ARBORETUM WILL ESTIMATE THE INCOME ON THE FORM 990. IT WILL USE THE ACTUAL K-1, WHEN RECEIVED, TO PREPARE THE FORM 990T AND PAY ALL APPROPRIATE INCOME TAXES.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>THE 990 IS REVIEWED AND APPROVED BY MANAGEMENT, REVIEWED AND APPROVED BY THE FINANCE COMITTEE AND THEN REVIEWED BY THE BOARD.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 12C</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ARBORETUM REQUIRES ALL BOARD MEMBERS TO FILL OUT FORMS, ANNUALLY, DISCLOSING ANY CONFLICTS OF INTEREST.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 15</FormAndLineReferenceDesc>
        <ExplanationTxt>THE COMPENSATION COMMITTEE, MADE UP OF MEMBERS OF THE BOARD, DETERMINES KEY EMPLOYEES SALARIES BY AN INDUSTRY SALARY REVIEW FROM GUIDESTAR AND REVIEW OF FORMS 990 OF OTHER ORGANIZATIONS. THE COMITTEE MEETS AND REVIEWS THE EXECUTIVE DIRECTOR'S PERFORMANCE AND DETERMINES APPROPRIATE SALARY.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ARBORETUM WILL MAKE GOVERNING DOCUMENTS, CONFLICT OF INTEREST POLICY AND FINANCIAL STATEMENTS AVAILABLE TO THE PUBLIC UPON WRITTEN REQUEST OF ANY INTERESTED PARTY.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>