<i>Coptis trifolia</i> (L.) Salisb. - Goldthread, Goldenroot, Yellow snakeroot.<br>Original caption: A. GOLDTHREAD - <i>Coptis trifolia"</i>
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.
<i>Wild Flowers of New York</i> Part 1, Plate 60 (A). Page 235. University of the State of New York, State Museum, Albany.