Memoir 15 N. Y. State Museum - Plate 171 - <i>Asclepias tuberosa</i> - Butterfly Weed; Pleurisy Root
Homer D. House, New York State Botanist. Walter B. Starr of the Matthews-Northrup Company, Buffalo, and Harold H. Snyder of the Zeese-Wilkinson Company, New York, photographers.
1918
<i>Wild Flowers of New York</i> Part 2, Plate 171. University of the State of New York, State Museum, Albany.