A. R. Harding, Ginseng and Other Medicinal Plants
“ The solitary terminal flower, which appears from May to June, is very showy and curiously formed, the lip being the most prominent part. This lip looks like a large inflated bay (1 to 2 inches long in the large Lady's-Slipper) , pale yellow or bright yellow in color, variously striped and blotched with purple. The other parts of the flower are greenish or yellowish, with purple stripes, and the petals are usually twisted. ”
