<i>Calypso bulbosa</i> var. <i>americana</i> - Fairy slipper, Calypso, Venus' slipper.<br><p>Original caption:<br>
Calypso<br><i>Cytherea bulbosa</i> (Linnaeus) House<br>
(<i>Calypso borealis</i> Salisbury)<br></p>
Plate 43a
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 1, University of the State of New York, State Museum, Albany.