Subchapter vi. Botanic Garden and National Garden 2 U.S. Code §2141. Supervision of Botanic Garden 2 U.S. Code §2142. Superintendent of Botanic Garden and greenhouses 2 U.S. Code §2143. Utilization of personnel by Architect of the Capitol for maintenance and operation of Botanic Garden 2 U.S. Code §2144. Disbursement of appropriations for Botanic Garden 2 U.S. Code §2145. Restriction on use of appropriation for Botanic Garden 2 U.S. Code §2146. National Garden 2 U.S. Code §2147. Plant material exchanges 2 U.S. Code §2148. Administration of educational outreach and services