Carlquist, Sherwin John, 1930-2021. [Nephalia (Cyathea) aquilina leaf close-up in Puerto Rico], photograph, 19XX; (https://texashistory.unt.edu/ark:/67531/metapth1646386/m1/1/: accessed July 16, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .