66 NEW YORK STATE MUSEUM 



In swamps and open wet woods, Newfoundland to Ontario, Minnesota 

 and Georgia. Flowering in June and July, more rarely in August in the 

 far north. Known also as Whip-poor-will's Shoe. 



It is doubtful if any wild flower surpasses this in beauty. It has been 

 gathered so extensively for its flowers in some localities that it has become 

 rather rare. It is one of the plants that above all others needs protection 

 in the way of education that will lead lovers of wild flowers to admire its 

 beauty where it grows, and to use caution in picking. 



Yellow or Downy Lady's-slipper 

 Cypripedium pubescens Willdenow 



Plate 31 



Stems tall and leafy, i| to 2\ feet high; leaves oval or elliptic 3 to 6 

 inches long, \\ to 3 inches wide, pointed; sepals ovate-lanceolate, usually 

 longer than the lip, yellowish or greenish yellow and striped with purple, 

 petals narrower, usually twisted and elongated; lip much inflated, sub- 

 globose, 1 to 2 inches long, pale yellow to bright yellow and sometimes 

 with purple lines, a tuft of white, jointed hairs inside at the top; sterile 

 stamen triangular, the thick, somewhat triangular stigma incurved. 



In rich woods and thickets, Nova Scotia to Ontario and Minnesota, 

 Alabama and Nebraska. This species is usually regarded as a form of 

 Cypripedium parviflorum Salisbury, which has a small, later- 

 ally compressed lip one-half to three-fourths of an inch long. Since 

 numerous intermediate forms occur it is probable that they represent forms 

 of a single variable species. 



Ram's-head Lady's-slipper 



Criosanthes arietina (R. Brown) House 

 {Cypripedium arietinum R. Brown) 



Plate 32b and Figure V 



Stems 6 to 12 inches high, with three or four elliptic or lanceolate 

 leaves 2 to 4 inches long, one-third to 3 inches wide, one-flowered ; sepals 



