This image is in the public domain and can be downloaded from the SEPARATE PUBLIC DOMAIN DATABASE [once photographed] When using it, please include the following credit statement: Courtesy of the Hunt Institute for Botanical Documentation, Carnegie Mellon University, Pittsburgh, Pa., on indefinite loan from the Smithsonian Institution.
from Asa Gray, United States exploring expedition during the years 1838, 1839, 1840, 1841, 1842 under the command of Charles Wilkes, U.S.N.Atlas. Botany. Phanerogamia. Vol. 1. New York, G. P. Putnam, 1857. Pl. 28.