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        <UnrelatedBusinessRevenueAmt>0</UnrelatedBusinessRevenueAmt>
        <ExclusionAmt>-20646</ExclusionAmt>
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      <TotalRevenueGrp>
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        <RelatedOrExemptFuncIncomeAmt>84615</RelatedOrExemptFuncIncomeAmt>
        <UnrelatedBusinessRevenueAmt>0</UnrelatedBusinessRevenueAmt>
        <ExclusionAmt>15626</ExclusionAmt>
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      <GrantsToDomesticIndividualsGrp>
        <TotalAmt>11500</TotalAmt>
        <ProgramServicesAmt>11500</ProgramServicesAmt>
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      <FeesForServicesAccountingGrp>
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        <ProgramServicesAmt>0</ProgramServicesAmt>
        <ManagementAndGeneralAmt>1000</ManagementAndGeneralAmt>
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      <FeesForSrvcInvstMgmntFeesGrp>
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        <ProgramServicesAmt>0</ProgramServicesAmt>
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        <FundraisingAmt>0</FundraisingAmt>
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      <OfficeExpensesGrp>
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        <ProgramServicesAmt>0</ProgramServicesAmt>
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        <FundraisingAmt>0</FundraisingAmt>
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      <InformationTechnologyGrp>
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        <ManagementAndGeneralAmt>598</ManagementAndGeneralAmt>
        <FundraisingAmt>0</FundraisingAmt>
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      <ConferencesMeetingsGrp>
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        <Desc>Publication cost</Desc>
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        <FundraisingAmt>0</FundraisingAmt>
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      <OtherExpensesGrp>
        <Desc>Membership and Marketing</Desc>
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        <ProgramServicesAmt>13156</ProgramServicesAmt>
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      <OtherExpensesGrp>
        <Desc>Lecture Series</Desc>
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      <OtherExpensesGrp>
        <Desc>NYC Wild Flower Week</Desc>
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        <ProgramServicesAmt>26897</ProgramServicesAmt>
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      <TotalFunctionalExpensesGrp>
        <TotalAmt>133537</TotalAmt>
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      <CashNonInterestBearingGrp>
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        <EOYAmt>70748</EOYAmt>
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      <InvestmentsPubTradedSecGrp>
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        <EOYAmt>776091</EOYAmt>
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        <EOYAmt>846839</EOYAmt>
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      <AccountsPayableAccrExpnssGrp>
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      <DeferredRevenueGrp>
        <BOYAmt>9524</BOYAmt>
        <EOYAmt>9473</EOYAmt>
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      <TotalLiabilitiesGrp>
        <BOYAmt>9524</BOYAmt>
        <EOYAmt>23606</EOYAmt>
      </TotalLiabilitiesGrp>
      <OrganizationFollowsSFAS117Ind>X</OrganizationFollowsSFAS117Ind>
      <UnrestrictedNetAssetsGrp>
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        <EOYAmt>823233</EOYAmt>
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      <TotalNetAssetsFundBalanceGrp>
        <BOYAmt>887634</BOYAmt>
        <EOYAmt>823233</EOYAmt>
      </TotalNetAssetsFundBalanceGrp>
      <TotLiabNetAssetsFundBalanceGrp>
        <BOYAmt>897158</BOYAmt>
        <EOYAmt>846839</EOYAmt>
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      <ReconcilationRevenueExpnssAmt>-6454</ReconcilationRevenueExpnssAmt>
      <NetUnrlzdGainsLossesInvstAmt>-57947</NetUnrlzdGainsLossesInvstAmt>
      <MethodOfAccountingAccrualInd>X</MethodOfAccountingAccrualInd>
      <AccountantCompileOrReviewInd>true</AccountantCompileOrReviewInd>
      <FSAuditedInd>false</FSAuditedInd>
      <AuditCommitteeInd>true</AuditCommitteeInd>
      <FederalGrantAuditRequiredInd>false</FederalGrantAuditRequiredInd>
    </IRS990>
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      <OtherSupportSumAmt>0</OtherSupportSumAmt>
      <GiftsGrantsContriRcvd170Grp>
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        <CurrentTaxYearMinus3YearsAmt>67183</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>64241</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>58075</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>55255</CurrentTaxYearAmt>
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      <GovtFurnSrvcFcltsVl170Grp>
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      <SubstantialContributorsTotAmt>0</SubstantialContributorsTotAmt>
      <PublicSupportTotal170Amt>313864</PublicSupportTotal170Amt>
      <GrossInvestmentIncome170Grp>
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        <CurrentTaxYearMinus3YearsAmt>87423</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>67765</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>78753</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>62718</CurrentTaxYearAmt>
        <TotalAmt>386384</TotalAmt>
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      <UnrelatedBusinessNetIncm170Grp>
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        <CurrentTaxYearMinus3YearsAmt>2633</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>4555</CurrentTaxYearMinus2YearsAmt>
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      <PublicSupportCY509Pct>0</PublicSupportCY509Pct>
      <InvestmentIncomeCYPct>0</InvestmentIncomeCYPct>
      <Form990ScheduleAPartVIGrp>
        <FormAndLineReferenceDesc>Pt II Ln 10</FormAndLineReferenceDesc>
        <ExplanationTxt>Other Income Part II, Line 10 Description: Memoirs 2014: 1293. 2015: 2633. 2016: 4555. 2017: 200. 2018: 9080. Description: Other 2014: 675. Description: Journal sales 2017: 480. 2018: 30. Description: 150th Aniversary 2017: 4205.</ExplanationTxt>
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      <GrantRecordsMaintainedInd>true</GrantRecordsMaintainedInd>
      <Total501c3OrgCnt>0</Total501c3OrgCnt>
      <TotalOtherOrgCnt>0</TotalOtherOrgCnt>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>Graduate Student Research Fellowship</GrantTypeTxt>
        <RecipientCnt>9</RecipientCnt>
        <CashGrantAmt>11500</CashGrantAmt>
        <NonCashAssistanceAmt>0</NonCashAssistanceAmt>
        <ValuationMethodUsedDesc>0</ValuationMethodUsedDesc>
        <NonCashAssistanceDesc>0</NonCashAssistanceDesc>
      </GrantsOtherAsstToIndivInUSGrp>
      <GrantsOtherAsstToIndivInUSGrp>
        <NonCashAssistanceAmt>0</NonCashAssistanceAmt>
        <ValuationMethodUsedDesc>0</ValuationMethodUsedDesc>
        <NonCashAssistanceDesc>0</NonCashAssistanceDesc>
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    </IRS990ScheduleI>
    <IRS990ScheduleO documentId="IRS990ScheduleO-01" softwareId="18007482">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Pt VI, Line 11b</FormAndLineReferenceDesc>
        <ExplanationTxt>A copy of form 990 is not provided to all members of the governing body before it is filed. However a review is conducted by the treasurer; acting on behalf of the board.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Pt VI, Line 12c</FormAndLineReferenceDesc>
        <ExplanationTxt>Potential conflicts of interest relating to proposed or on going transactions involving directors and key employees are reviewed by the board of directors (council). Persons with potential conflicts do not participate in deliberations and decisions regarding such transactions.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Pt III, Line 2</FormAndLineReferenceDesc>
        <ExplanationTxt>none</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Pt VI, Line 15a</FormAndLineReferenceDesc>
        <ExplanationTxt>See Line 15b</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Pt VI, Line 15b</FormAndLineReferenceDesc>
        <ExplanationTxt>Compensation, if any, for governing officers and top management is reviewed approved by the board of directors (council) of the organization. Most of such persons are volunteers and are generally not compensated.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Pt VI, Line 19</FormAndLineReferenceDesc>
        <ExplanationTxt>The bylaws and constitution are available on the web site. All other documents are available upon request or on The New York Charities Bureau website.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Pt VI, Line 6</FormAndLineReferenceDesc>
        <ExplanationTxt>The organization's members are those that pay dues.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Pt VI, Line 7a</FormAndLineReferenceDesc>
        <ExplanationTxt>Members of the council are elected by the members, excluding associate members, of TBS present at our annual meeting which is held in March. A slate of officers which is drawn up by a committee that consists volunteers(general members and or council members) is presented in February and voted on in March.Alternate names for council positions may be entered according to the by-law procedures.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part III, Line 4d</FormAndLineReferenceDesc>
        <ExplanationTxt>Organized botanical field trips in Torrey range. 17798. 11500. 1812.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part IX, Line 24e</FormAndLineReferenceDesc>
        <ExplanationTxt>Field Trips 701. 701. 0. 0.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part IX, Line 24e</FormAndLineReferenceDesc>
        <ExplanationTxt>Memberships 200. 0. 200. 0.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part IX, Line 24e</FormAndLineReferenceDesc>
        <ExplanationTxt>Annual meeting 391. 391. 0. 0.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part IX, Line 24e</FormAndLineReferenceDesc>
        <ExplanationTxt>Council meeting 0. 0. 0. 0.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>