PLATE XXIII 



LARGE YELLOW LADY'S SLIPPER, C. hirsutum (C. 

 pubescens). Root. Same as previous varieties. Stem. 

 Leafy, i-2 high. Leaves. Oval, slightly hirsute. 

 Flower. Large, solitary, terminal, and nodding. Peri- 

 anth. With oval sepals, the two lower joined. Petals 

 linear and twisted, all yellowish-green or brownish- 

 purple. Lip much inflated, chrome yellow. Column 

 (.4). Much as other varieties. The sterile stamen (c) 

 yellow with red dots. Anthers (a). Stigma (6). 



The bright flower of the Yellow Moccasin appears in 

 boglands or damp woods, from Nova Scotia west to 

 Minnesota and south to Alabama, in May to July. It 

 is not quite so large as C. acaule, but larger than the Ram's 

 Head Slipper. It is not common I have found it only 

 once; but my quest was well rewarded then, for the deli- 

 cate, balloon-like sac is very lovely. 



SMALL YELLOW LADY'S SLIPPER, C. parviflorum. Root, 

 Stem, Leaves. Much as above. Flower. Smaller, 

 fragrant. Perianth. With bright yellow, hairy-lined 

 lip, marked with purple or crimson. Column. As 

 above. 



This variety often intergrades with C. hirsutum. It 

 may be a simple form of the latter. It grows in bogs, 

 damp woods, and on hillsides in the mountains, from 

 Newfoundland to Georgia and occasionally out to the 

 Pacific, from May to July. 



PRAIRIE MOCCASIN FLOWER, SMALL WHITE LADY'S 

 SLIPPER, C. candidum. Stem. 6'- 12* high. Leaves. 

 3-4, elliptic or lanceolate. Flowers. Fragrant, 

 generally solitary, terminal, white and brown. Perianth. 

 Much like C. hirsutum, with a white lip lined with 

 purple stripes. Column. As above. 



The White Lady's Slipper is much like the yellow. 

 It ranges in May to July, from New York to the Rockies. 

 John Muir found it, or a variety much like it, in the Yo- 

 semite Valley. This> together with the Small Yellow 

 Lady's Slipper, 4s the only fragrant cypripedium we 

 have. 



Although the Pacific coast is rich in beautiful flowers, 

 this white moccasin is the only cvpripedium it can boast. 



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