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        <ExplanationTxt>Two members of the governing body of the Garden Club of America (the supported organization) also serve as members of the governing body of Casey Trees (the supporting organization). The President of the Garden Club of America ("GCA") annually appoints two members of the Board of Directors of the GCA to serve on Casey Trees' Board of Directors. One of these members is chosen from among the members of the Board of Directors of the GCA, and one is chosen from among the officers of the GCA. Service as a director of Casey Tees shall automatically terminate in the event that such director no longer serves as an officer or director of GCA, for any reason whatsoever. Because of this relationship, the supported organization has a significant voice in the supporting organization's investment policies, timing of grants, manner of making grants, selection of grant recipients, and other use of income or assets (the "significant voice" test).</ExplanationTxt>
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      <Form990ScheduleAPartVIGrp>
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        <ExplanationTxt>The mission of the GCA is to stimulate the knowledge and love of gardening, to share the advantages of association by means of educational meetings, conferences, correspondence, and publications, and to restore, improve, and protect the quality of the environment through educational programs and action in the fields of conservation and civic improvement. Substantially all Casey Trees activities conducted are in direct furtherance of the mission of the GCA. Casey Trees was organized by the GCA in 2001 to accept a permanently restricted endowment granted by the Eugene B. Casey Foundation of Gaithersburg, Maryland. Casey Trees provides support to the GCA through its reforestation projects in Washington, D.C.</ExplanationTxt>
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      <Form990ScheduleAPartVIGrp>
        <FormAndLineReferenceDesc>Schedule A, Part IV, Section E, Line 2b:</FormAndLineReferenceDesc>
        <ExplanationTxt>Casey Trees holds title to and manages exempt use assets through its ownership of Casey Tree Farm, LLC. Casey Trees activities include tree planting and the protection of the "urban canopy."</ExplanationTxt>
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        <ExplanationTxt>Casey Trees staff have periodic meetings with DC officials and provide testimony for the City Council hearings on potential legislation and its impacts on the mission of Casey Trees.</ExplanationTxt>
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        <Desc>Limited Partnership Interests</Desc>
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      <FootnoteTextInd>X</FootnoteTextInd>
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        <FormAndLineReferenceDesc>Part II, Line 5:</FormAndLineReferenceDesc>
        <ExplanationTxt>The conservation agreement and related documents state the Casey Trees maintains the following rights with regard to monitoring and enforcement policies: 1. A perpetual easement and right to preserve and protect the conservation values of the property; 2. A perpetual easement and right to enter upon and inspect the property at reasonable times, and upon prior reasonable notice in order to monitor the landowner's compliance with and otherwise enforce the terms of the easement; provided, however, in cases where holder determines that immediate entry is reasonably necessary to prevent, terminate or mitigate a violation or suspected violation of this conservation easement, such entry may be without prior notice to land owner. 3. A perpetual easement and right to prevent (including the right to see injunctive relief) for any activity on or use of the property that is inconsistent with terms of the conservation easement and the purpose, and to require restoration of such areas or features of the property that may be damaged by any inconsistent activity or use; and 4. A perpetual easement and right to display on the property, at its discretion such signs as it may customarily use to identify lands under conservation easement, the terms of the conservation easement or the conservation values being protected. If Casey Trees determines that the landowner, or third parties under landowner's authority or control or acting with landowner's knowledge, is in violation of the terms of the conservation easement, Casey Trees will give written notice to landowner of such violations and demand corrective action. If landowner fails to cure the violation within 30 days after receipt of notice, Casey Trees may bring action at law or in equity in a court of competent jurisdiction to enforce terms of the conservation easement.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part II, Line 9:</FormAndLineReferenceDesc>
        <ExplanationTxt>The Organization holds a conservation easement on real property located in Washington, DC. The purpose of the conservation easement is to prevent uses and development of the property that would degrade the scenic, open space and natural character of the property. Additionally, the property will be managed to provide open space, to protect existing and future tree canopy, and to protect water quality and open space. The conservation easement held by the Organization was obtained via gift deed from the property owner of record at the time of donation. Since this easement has no marketable value, the Organization assigned a nominal value of $1 to the easement and recorded it as conservation easement, which is included in other assets in the audited financial statements at June 30, 2016.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part V, Line 4:</FormAndLineReferenceDesc>
        <ExplanationTxt>Casey Trees' endowment is used to fund operations.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part X, Line 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>The Organization had no significant uncertain tax positions at June 30, 2017 and 2016.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part XI, Line 4b - Other Adjustments:</FormAndLineReferenceDesc>
        <ExplanationTxt>Direct fundraising event expenses -88,249.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part XII, Line 2d - Other Adjustments:</FormAndLineReferenceDesc>
        <ExplanationTxt>Direct fundraising event expenses 88,249.</ExplanationTxt>
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        <GrossRevenueEvent1Amt>53902</GrossRevenueEvent1Amt>
        <NonCashPrizesEvent1Amt>8217</NonCashPrizesEvent1Amt>
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        <RentFcltyCostsTotalEventsAmt>15000</RentFcltyCostsTotalEventsAmt>
        <FoodAndBeverageTotalEventsAmt>26624</FoodAndBeverageTotalEventsAmt>
        <EntertainmentTotalEventsAmt>29490</EntertainmentTotalEventsAmt>
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        <PersonNm>Mark Buscaino</PersonNm>
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        <TotalCompensationFilingOrgAmt>187749</TotalCompensationFilingOrgAmt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section A, line 7a</FormAndLineReferenceDesc>
        <ExplanationTxt>The Garden Club of America selects two members of Casey Trees' Board of Directors.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, line 11b</FormAndLineReferenceDesc>
        <ExplanationTxt>A copy of the Form 990 is first reviewed and approved by Casey Trees' outside accountant and management. Upon management's approval, the Form 990 is forwarded to the audit committee for review prior to submission. A copy of the Form 990 is then provided to the Board of Directors before it is filed.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, line 12c</FormAndLineReferenceDesc>
        <ExplanationTxt>In connection with any actual or possible conflict of interest, an interested person must disclose the existence of the interest as soon as s/he realizes a conflict of interest exists to the Executive Committee of the Board of Directors or a governing body established by the Board President. After exercising due diligence with all the information available to it, the Executive Committee or governing board shall determine whether Casey Trees can obtain with reasonable efforts a more advantageous transaction or arrangement from a person or entity that would not give rise to a conflict of interest. If not, the Executive Committee or governing board shall determine by a majority vote whether the transaction or arrangement is in Casey Trees' best interest, for its own benefit, and whether it is fair and reasonable. In conformity with the above determination it shall make its decision as to whether to enter into the transaction or arrangment. A record of the aformentioned proceedings shall be kept that identifies the person(s) with the potential conflict of interest, the nature of the conflict itself, the names of the members of the committee present for deliberations, and the nature of the discussion and resolution(s). Failure to report a conflict of interest may result in disciplinary action including termination.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, line 15</FormAndLineReferenceDesc>
        <ExplanationTxt>When hiring an Executive Director, the Board President shall review documents pertaining to the cash and non-cash compensation for Executive Directors of similar organizations to determine if the compensation package is appropriate. Setting of the initial salary level will account for skills, experience, locality adjustments, etc. Thereafter, on an annual basis, the Board President will review the Executive Director's performance, and account for factors such as internal and external pay equity and others as appropriate, to determine if a salary increase or other compensation is warranted. The President may assign this duty to another board member(s) at his/her discretion as needs dictate. The setting of the initial salary/benefit levels, and any increases, shall be reviewed and agreed to by the Executive Committee of the Board.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section C, line 18</FormAndLineReferenceDesc>
        <ExplanationTxt>Casey Trees makes its Form 1023 available upon request. Casey Trees makes available a public disclosure copy of its Federal Form 990 upon request and on Guidestar.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section C, line 19</FormAndLineReferenceDesc>
        <ExplanationTxt>Casey Trees makes its governing documents, certain policies (including conflict of interest policy) and financial statements available upon request based on the discretion of management.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part XII, Line 2c</FormAndLineReferenceDesc>
        <ExplanationTxt>Casey Trees' Audit Committee assumes responsibility for oversight of the audit of its financial statements and selection of an independent accountant. The Audit Committee was established during fiscal year 2009. In prior years, the Finance Committee assumed responsibility for oversight of the audit.</ExplanationTxt>
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          <CityNm>Washington</CityNm>
          <StateAbbreviationCd>DC</StateAbbreviationCd>
          <ZIPCd>20017</ZIPCd>
        </USAddress>
        <PrimaryActivitiesTxt>To manage real estate and property, grow trees and conduct tree research.</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>VA</LegalDomicileStateCd>
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          <CityNm>New York</CityNm>
          <StateAbbreviationCd>NY</StateAbbreviationCd>
          <ZIPCd>10022</ZIPCd>
        </USAddress>
        <EIN>131626773</EIN>
        <PrimaryActivitiesTxt>To stimulate the knowledge and love of gardening.</PrimaryActivitiesTxt>
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        <ExemptCodeSectionTxt>501(c)(3)</ExemptCodeSectionTxt>
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