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        <TotalAmt>66734</TotalAmt>
        <ProgramServicesAmt>58138</ProgramServicesAmt>
        <ManagementAndGeneralAmt>5784</ManagementAndGeneralAmt>
        <FundraisingAmt>2812</FundraisingAmt>
      </InsuranceGrp>
      <OtherExpensesGrp>
        <Desc>MAINTENANCE AND REPAIRS</Desc>
        <TotalAmt>228157</TotalAmt>
        <ProgramServicesAmt>193516</ProgramServicesAmt>
        <ManagementAndGeneralAmt>24249</ManagementAndGeneralAmt>
        <FundraisingAmt>10392</FundraisingAmt>
      </OtherExpensesGrp>
      <OtherExpensesGrp>
        <Desc>PRINTING AND PUBLICATIO</Desc>
        <TotalAmt>40390</TotalAmt>
        <ProgramServicesAmt>31322</ProgramServicesAmt>
        <ManagementAndGeneralAmt>1695</ManagementAndGeneralAmt>
        <FundraisingAmt>7373</FundraisingAmt>
      </OtherExpensesGrp>
      <OtherExpensesGrp>
        <Desc>EDUCATION AND CONFERENC</Desc>
        <TotalAmt>32928</TotalAmt>
        <ProgramServicesAmt>29272</ProgramServicesAmt>
        <ManagementAndGeneralAmt>1746</ManagementAndGeneralAmt>
        <FundraisingAmt>1910</FundraisingAmt>
      </OtherExpensesGrp>
      <OtherExpensesGrp>
        <Desc>SPECIAL EVENTS</Desc>
        <TotalAmt>21509</TotalAmt>
        <ProgramServicesAmt>16757</ProgramServicesAmt>
        <ManagementAndGeneralAmt>1480</ManagementAndGeneralAmt>
        <FundraisingAmt>3272</FundraisingAmt>
      </OtherExpensesGrp>
      <AllOtherExpensesGrp>
        <TotalAmt>48828</TotalAmt>
        <ProgramServicesAmt>38371</ProgramServicesAmt>
        <ManagementAndGeneralAmt>6732</ManagementAndGeneralAmt>
        <FundraisingAmt>3725</FundraisingAmt>
      </AllOtherExpensesGrp>
      <TotalFunctionalExpensesGrp>
        <TotalAmt>1509918</TotalAmt>
        <ProgramServicesAmt>1136752</ProgramServicesAmt>
        <ManagementAndGeneralAmt>230984</ManagementAndGeneralAmt>
        <FundraisingAmt>142182</FundraisingAmt>
      </TotalFunctionalExpensesGrp>
      <CashNonInterestBearingGrp>
        <EOYAmt>1</EOYAmt>
      </CashNonInterestBearingGrp>
      <SavingsAndTempCashInvstGrp>
        <BOYAmt>750687</BOYAmt>
        <EOYAmt>116485</EOYAmt>
      </SavingsAndTempCashInvstGrp>
      <PledgesAndGrantsReceivableGrp>
        <BOYAmt>217283</BOYAmt>
        <EOYAmt>170720</EOYAmt>
      </PledgesAndGrantsReceivableGrp>
      <ReceivablesFromOfficersEtcGrp>
        <BOYAmt>569177</BOYAmt>
        <EOYAmt>543972</EOYAmt>
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      <InventoriesForSaleOrUseGrp>
        <BOYAmt>3980</BOYAmt>
        <EOYAmt>3980</EOYAmt>
      </InventoriesForSaleOrUseGrp>
      <PrepaidExpensesDefrdChargesGrp>
        <BOYAmt>30000</BOYAmt>
        <EOYAmt>30000</EOYAmt>
      </PrepaidExpensesDefrdChargesGrp>
      <LandBldgEquipCostOrOtherBssAmt>7737781</LandBldgEquipCostOrOtherBssAmt>
      <LandBldgEquipAccumDeprecAmt>1951698</LandBldgEquipAccumDeprecAmt>
      <LandBldgEquipBasisNetGrp>
        <BOYAmt>5780675</BOYAmt>
        <EOYAmt>5786083</EOYAmt>
      </LandBldgEquipBasisNetGrp>
      <InvestmentsPubTradedSecGrp>
        <BOYAmt>16723370</BOYAmt>
        <EOYAmt>19439204</EOYAmt>
      </InvestmentsPubTradedSecGrp>
      <InvestmentsOtherSecuritiesGrp>
        <BOYAmt>2885206</BOYAmt>
        <EOYAmt>3350875</EOYAmt>
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      <TotalAssetsGrp>
        <BOYAmt>26960378</BOYAmt>
        <EOYAmt>29441320</EOYAmt>
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      <AccountsPayableAccrExpnssGrp>
        <BOYAmt>56118</BOYAmt>
        <EOYAmt>20247</EOYAmt>
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      <TotalLiabilitiesGrp>
        <BOYAmt>56118</BOYAmt>
        <EOYAmt>20247</EOYAmt>
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      <OrganizationFollowsSFAS117Ind>X</OrganizationFollowsSFAS117Ind>
      <UnrestrictedNetAssetsGrp>
        <BOYAmt>8124222</BOYAmt>
        <EOYAmt>8402930</EOYAmt>
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      <TemporarilyRstrNetAssetsGrp>
        <BOYAmt>5358656</BOYAmt>
        <EOYAmt>7596761</EOYAmt>
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      <PermanentlyRstrNetAssetsGrp>
        <BOYAmt>13421382</BOYAmt>
        <EOYAmt>13421382</EOYAmt>
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      <TotalNetAssetsFundBalanceGrp>
        <BOYAmt>26904260</BOYAmt>
        <EOYAmt>29421073</EOYAmt>
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      <TotLiabNetAssetsFundBalanceGrp>
        <BOYAmt>26960378</BOYAmt>
        <EOYAmt>29441320</EOYAmt>
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      <ReconcilationRevenueExpnssAmt>50984</ReconcilationRevenueExpnssAmt>
      <NetUnrlzdGainsLossesInvstAmt>2662639</NetUnrlzdGainsLossesInvstAmt>
      <InvestmentExpenseAmt>-196810</InvestmentExpenseAmt>
      <OtherChangesInNetAssetsAmt>0</OtherChangesInNetAssetsAmt>
      <MethodOfAccountingAccrualInd>X</MethodOfAccountingAccrualInd>
      <AccountantCompileOrReviewInd>0</AccountantCompileOrReviewInd>
      <FSAuditedInd>1</FSAuditedInd>
      <FSAuditedBasisGrp>
        <SeparateBasisFinclStmtInd>X</SeparateBasisFinclStmtInd>
      </FSAuditedBasisGrp>
      <AuditCommitteeInd>1</AuditCommitteeInd>
      <FederalGrantAuditRequiredInd>0</FederalGrantAuditRequiredInd>
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    <IRS990ScheduleA documentId="RetDoc1039100001">
      <PublicOrganization170Ind>X</PublicOrganization170Ind>
      <GiftsGrantsContriRcvd170Grp>
        <CurrentTaxYearMinus4YearsAmt>10633567</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>632740</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>843940</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>1352981</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>621579</CurrentTaxYearAmt>
        <TotalAmt>14084807</TotalAmt>
      </GiftsGrantsContriRcvd170Grp>
      <TotalCalendarYear170Grp>
        <CurrentTaxYearMinus4YearsAmt>10633567</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>632740</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>843940</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>1352981</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>621579</CurrentTaxYearAmt>
        <TotalAmt>14084807</TotalAmt>
      </TotalCalendarYear170Grp>
      <SubstantialContributorsTotAmt>10671908</SubstantialContributorsTotAmt>
      <PublicSupportTotal170Amt>3412899</PublicSupportTotal170Amt>
      <GrossInvestmentIncome170Grp>
        <CurrentTaxYearMinus4YearsAmt>248350</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>258766</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>246233</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>273984</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>356048</CurrentTaxYearAmt>
        <TotalAmt>1383381</TotalAmt>
      </GrossInvestmentIncome170Grp>
      <TotalSupportAmt>15468188</TotalSupportAmt>
      <GrossReceiptsRltdActivitiesAmt>349526</GrossReceiptsRltdActivitiesAmt>
      <PublicSupportCY170Pct>0.22060</PublicSupportCY170Pct>
      <PublicSupportPY170Pct>0.23210</PublicSupportPY170Pct>
      <TenPctFactsCrcmstncsTestCYInd>X</TenPctFactsCrcmstncsTestCYInd>
      <FactsAndCircumstancesTestTxt>THE ARBORETUM NORMALLY RECEIVES &gt;35% OF ITS SUPPORT FROM PUBLIC SUPPORT. IT MAINTAINS A DEVELOPMENT PROGRAM TO SOLICIT FUNDS FROM THE PUBLIC AND HAS BROAD-BASED SUPPORT. IF IT WERE NOT FOR THE ONE-TIME GIFT DESCRIBED BELOW, OR IF THE GIFT HAD BEEN EXCLUDED AS AN UNUSUAL GIFT, THE ARBORETUM WOULD HAVE PASSED THE PUBLIC SUPPORT TEST WITH 47% PUBLIC SUPPORT IN 2013; 52% PUBLIC SUPPORT IN 2014; 39% PUBLC SUPPORT IN 2015; 49% PUBLIC SUPPORT IN 2016; AND 56% PUBLIC SUPPORT IN 2016 (CALCULATIONS AVAILABLE UPON REQUEST). EVEN WITH THIS DONATION THE ARBORETUM STILL RECEIVED 22%, 23%, 20%, 21% AND 21% OF ITS DONATIONS FROM PUBLIC SUPPORT IN 2017, 2016, 2015, 2014 AND 2013. PUBLIC SUPPORT ALSO ACCOUNTED FOR 36%, 41%, AND 53% IN 2012, 2011, AND 2010, RESPECTIVELY. THE ARBORETUM HAS FAILED THE PUBLIC SUPPORT TEST ONLY BECAUSE OF A LARGE, ONE-TIME, DONATION MADE IN 2013. THE ARBORETUM HAS PASSED THE PUBLIC SUPPORT TEST IN EVERY YEAR PRIOR TO 2013 AND, EXCLUSIVE OF THIS ONE GIFT, INTENDS TO PASS IT AGAIN EVERY YEAR GOING FORWARD.DURING 2013 THE ARBORETUM RECEIVED A $10,000,000 GIFT FROM A FOUNDATION. THIS LARGE, ONE-TIME, GIFT WAS GIVEN IN 2013 AT THE RECOMMENDATION OF A PERSON WHO SAT ON THE BOARDS OF BOTH ORGANIZATIONS. THIS PERSON RETIRED FROM THE ARBORETUM'S BOARD IN OCTOBER 2015. AT THE TIME OF THE GIFT IT WAS HER WISH, AND THAT OF THE FOUNDATION, THAT THIS GIFT WOULD HELP SECURE THE FINANCIAL SUSTAINABILITY AND INDEPENDENCE OF THE ARBORETUM INTO THE FUTURE. $9,000,000 OF THE DONATION WAS RESTRICTED TO THE ARBORETUM'S PERMANENT ENDOWMENT AND $1,000,000 WAS TEMPORARILY RESTRICTED TO CREATE A MATCHING CHALLENGE GRANT. THE INTENT OF THE ENDOWMENT'S RESTRICTIONS IS TO PROVIDE FINANCIAL SECURITY GOING FORWARD. THE $1,000,000 CHALLENGE GRANT WAS RESTRICTED TO EXPANDING THE ARBORETUMS EDUCATIONAL AND RESEARCH FACILITIES. THESE RESTRICTIONS DO NOT GIVE THE FOUNDATION ANY CONTROL OVER HOW OR WHEN THE ARBORETUM USES THESE FUNDS. FURTHER, IN 2015, THE ARBORETUM USED THE $1,000,000 GIFT AS MATCHING FUNDS TO HELP IT OBTAIN A GRANT FROM THE COMMONWEALTH OF MASSACHUSETTS FOR THE PURPOSE OF EXPANDING ITS EDUCATIONAL AND RESEARCH FACILITIES.THE ARBORETUM COULD NOT EXCLUDE THE GIFT AS AN "UNUSUAL GIFT" BECAUSE WE DID NOT BELIEVE THAT THE FOUNDATION WAS A "DISINTERESTED PARTY". THE ARBORETUM RECEIVED GIFTS FROM THE FOUNDATION TOTALING $649,200 IN THE PRECEDING 4 YEARS AND A MEMBER OF THE BOARD OF THE ARBORETUM AT THAT TIME WAS ALSO ON THE BOARD OF THE FOUNDATION. IF NOT FOR THIS RELATIONSHIP THIS DONATION WOULD HAVE BEEN EXCLUDED AS AN UNUSUAL GIFT. THIS BOARD MEMBER RETIRED FROM THE ARBORETUM'S BOARD IN OCTOBER, 2015. IT IS EXPECTED THAT DONATIONS FROM BOTH THE BOARD MEMBER AND THE FOUNDATION WILL GREATLY DIMINISH (THEIR COMBINED DONATIONS TOTALLED $20,000; $20,000 AND $20,000 IN 2016, 2015 AND 2014, RESPECTIVELY). NEITHER THE FORMER BOARD MEMBER NOR THE FOUNDATION THAT MADE THE GIFT HAS NOR WILL HAVE THE ABILITY TO EXERCISE ANY CONTROL OVER THE ARBORETUM. THE BOARD OF THE ARBORETUM IS COMPRISED MAINLY OF NON-RELATED INDIVIDUALS FROM VARIOUS GEOGRAPHICAL LOCATIONS WHOSE COMMON BOND IS THEIR INTEREST IN MAINTAINING THE ARBORETUM AS AN EDUCATIONAL RESOURCE FOR THE PUBLIC, AS CONSERVED, CULTIVATED LAND, AND FOR PUBLIC ENJOYMENT. IN DOING THIS THE BOARD REPRESENTS THE BROAD INTERESTS OF THE PUBLIC. THE ARBORETUM MAINTAINS A UNIQUE LIVING COLLECTION OF PLANTS THAT IS OPEN TO THE GENERAL PUBLIC, FOR FREE, EVERY DAY FROM DAWN TO DUSK AND RUNS EDUCATION PROGRAMS FOR THE GENERAL PUBLIC ON A FREQUENT AND ON-GOING BASIS. WE BELIEVE, GIVEN THESE FACTS AND CIRCUMSTANCES, THAT THE ARBORETUM HAS PASSED THE 10%-FACTS-AND CIRCUMSTANCES PUBLIC SUPPORT TEST.</FactsAndCircumstancesTestTxt>
    </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>19551958</BeginningYearBalanceAmt>
        <InvestmentEarningsOrLossesAmt>3172134</InvestmentEarningsOrLossesAmt>
        <OtherExpendituresAmt>756212</OtherExpendituresAmt>
        <EndYearBalanceAmt>21967880</EndYearBalanceAmt>
      </CYEndwmtFundGrp>
      <CYMinus1YrEndwmtFundGrp>
        <BeginningYearBalanceAmt>19336794</BeginningYearBalanceAmt>
        <ContributionsAmt>578476</ContributionsAmt>
        <InvestmentEarningsOrLossesAmt>418137</InvestmentEarningsOrLossesAmt>
        <OtherExpendituresAmt>781449</OtherExpendituresAmt>
        <EndYearBalanceAmt>19551958</EndYearBalanceAmt>
      </CYMinus1YrEndwmtFundGrp>
      <CYMinus2YrEndwmtFundGrp>
        <BeginningYearBalanceAmt>19520289</BeginningYearBalanceAmt>
        <InvestmentEarningsOrLossesAmt>470541</InvestmentEarningsOrLossesAmt>
        <OtherExpendituresAmt>654036</OtherExpendituresAmt>
        <EndYearBalanceAmt>19336794</EndYearBalanceAmt>
      </CYMinus2YrEndwmtFundGrp>
      <CYMinus3YrEndwmtFundGrp>
        <BeginningYearBalanceAmt>18763403</BeginningYearBalanceAmt>
        <InvestmentEarningsOrLossesAmt>1246910</InvestmentEarningsOrLossesAmt>
        <OtherExpendituresAmt>490024</OtherExpendituresAmt>
        <EndYearBalanceAmt>19520289</EndYearBalanceAmt>
      </CYMinus3YrEndwmtFundGrp>
      <CYMinus4YrEndwmtFundGrp>
        <BeginningYearBalanceAmt>7550027</BeginningYearBalanceAmt>
        <ContributionsAmt>9000000</ContributionsAmt>
        <InvestmentEarningsOrLossesAmt>2562528</InvestmentEarningsOrLossesAmt>
        <OtherExpendituresAmt>349152</OtherExpendituresAmt>
        <EndYearBalanceAmt>18763403</EndYearBalanceAmt>
      </CYMinus4YrEndwmtFundGrp>
      <BoardDesignatedBalanceEOYPct>0.08000</BoardDesignatedBalanceEOYPct>
      <PrmnntEndowmentBalanceEOYPct>0.61000</PrmnntEndowmentBalanceEOYPct>
      <TermEndowmentBalanceEOYPct>0.31000</TermEndowmentBalanceEOYPct>
      <EndowmentsHeldUnrelatedOrgInd>0</EndowmentsHeldUnrelatedOrgInd>
      <EndowmentsHeldRelatedOrgInd>0</EndowmentsHeldRelatedOrgInd>
      <LandGrp>
        <OtherCostOrOtherBasisAmt>2377232</OtherCostOrOtherBasisAmt>
        <BookValueAmt>2377232</BookValueAmt>
      </LandGrp>
      <BuildingsGrp>
        <OtherCostOrOtherBasisAmt>4868086</OtherCostOrOtherBasisAmt>
        <DepreciationAmt>1554869</DepreciationAmt>
        <BookValueAmt>3313217</BookValueAmt>
      </BuildingsGrp>
      <EquipmentGrp>
        <OtherCostOrOtherBasisAmt>339948</OtherCostOrOtherBasisAmt>
        <DepreciationAmt>269154</DepreciationAmt>
        <BookValueAmt>70794</BookValueAmt>
      </EquipmentGrp>
      <OtherLandBuildingsGrp>
        <OtherCostOrOtherBasisAmt>152515</OtherCostOrOtherBasisAmt>
        <DepreciationAmt>127675</DepreciationAmt>
        <BookValueAmt>24840</BookValueAmt>
      </OtherLandBuildingsGrp>
      <TotalBookValueLandBuildingsAmt>5786083</TotalBookValueLandBuildingsAmt>
      <OtherSecuritiesGrp>
        <Desc>ENDOWMENT LTD PARTNERSHIP</Desc>
        <BookValueAmt>3350875</BookValueAmt>
        <MethodValuationCd>F</MethodValuationCd>
      </OtherSecuritiesGrp>
      <TotalBookValueSecuritiesAmt>3350875</TotalBookValueSecuritiesAmt>
      <TotalRevEtcAuditedFinclStmtAmt>4026731</TotalRevEtcAuditedFinclStmtAmt>
      <NetUnrealizedGainsInvstAmt>2662639</NetUnrealizedGainsInvstAmt>
      <RevenueNotReportedAmt>2662639</RevenueNotReportedAmt>
      <RevenueSubtotalAmt>1364092</RevenueSubtotalAmt>
      <InvestmentExpensesNotIncldAmt>196810</InvestmentExpensesNotIncldAmt>
      <RevenueNotReportedFinclStmtAmt>196810</RevenueNotReportedFinclStmtAmt>
      <TotalRevenuePerForm990Amt>1560902</TotalRevenuePerForm990Amt>
      <TotExpnsEtcAuditedFinclStmtAmt>1509918</TotExpnsEtcAuditedFinclStmtAmt>
      <ExpensesNotReportedAmt>0</ExpensesNotReportedAmt>
      <ExpensesSubtotalAmt>1509918</ExpensesSubtotalAmt>
      <ExpensesNotRptFinclStmtAmt>0</ExpensesNotRptFinclStmtAmt>
      <TotalExpensesPerForm990Amt>1509918</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>EXEUTIVE DIRECTOR</TitleTxt>
        <BaseCompensationFilingOrgAmt>183359</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>0</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>41370</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>224729</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>543972</BalanceDueAmt>
        <DefaultInd>0</DefaultInd>
        <BoardOrCommitteeApprovalInd>1</BoardOrCommitteeApprovalInd>
        <WrittenAgreementInd>1</WrittenAgreementInd>
      </LoansBtwnOrgInterestedPrsnGrp>
      <TotalBalanceDueAmt>543972</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>