C W Powell in his Panama garden from the Annual Report of the Board of Regents Smithsonian Institution 1924
Smithsonian Institution
Acquired from a website, <a rel="nofollow" class="external free" href="https://archive.org/stream/annualreportofbo1924smit#page/n461/mode/1up">https://archive.org/stream/annualreportofbo1924smit#page/n461/mode/1up</a>