92 BOTANY OF MICHIGAN 



IRIDACEAE. Iris Family 



Iris versicolor L. Larger blue-flag. Damp open or shaded ground. 

 Seldom abundant. 



Sisyrinchium angustifoliwn Mill. Pointed blue-eyed grass. On and 

 near the sandy beach of Lake Michigan. Apparently infrequent. 



ORCHIDACEAE. Orchis Family 



Cypripedium parviflorwn Salisb. Smaller yellow lady's slipper. 

 Damp rich or swampy shaded ground. Apparently not common. 



Cypripedium parviflorwn pubescens (Willd.) Knight. Larger yellow 

 lady's slipper. Damp places in hardwoods. Frequent. 



Cypripedium aindidum Muhl. Small white lady's slipper. Swampy 

 ground near Manistique. Plentiful. W. T. S. Cornell. 



Cypripedium hirsutum Mill. (C. reginae Walt.) . Showy lady's slipper. 

 Swampy ground and margin of wet woods. Apparently infrequent. 



Cypripedium acaule Ait. (Fissipes acaulis (Ait.) Small). Stemless 

 lady's slipper. In tamarack-black spruce swamps or shaded sandy 

 ground. Seldom abundant. 



Habenaria bracteoia (Willd.) R. Br. (Coeloglossum bracteatum (Willd.) 

 Pari.). Long-bracted orchis. Frequent in hardwoods. 



Habenaria hyperborea (L.) R. Br. (Limnorchis hyperborea (L.) Rydb.). 

 Tall leafy green orchis. Frequent in open hardwoods. 



Habenaria dilatata (Pursh) Gray. {Limnorchis dilatata (Pursh) Rydb.). 

 Tall white bog orchis. Bogs and often in wet sand. Frequent and often 

 plentiful. 



Habenaria obtusata (Pursh) Richards. (Lysiella obtusata (Pursh) Rich- 

 ards). Small northern bog orchis. Tamarack-black spruce swamps 

 and also in other very low wet shaded places. Apparently not common. 



Habenaria hookeri Torr. (Lysias hookeriana (A. Gray) Rydb.). 

 Llooker's orchis. Noticed as occasional in hardwoods. 



Habenaria orbiculata (Pursh) Torr. (Lysias orbiculata (Pursh) Rydb.). 

 Round-leaved orchis. Noticed in hardwoods. Apparently infrequent. 



Habenaria macrophylla Goldie. Large round-leaved orchis. Rich 

 shaded ground. Apparently infrequent. 



Pogonia ophioglossoides (L.) Ker. Rose pogonia. In open boggy 

 places. Frequent. 



Calopogon pulchellus (Sw.) R. Br. (Limodorum tuberosum L.). Grass 

 pink. Open boggy places. Often plentiful. 



Arethusa bulbosa L> Arethusa. Wild pink. Very wet and boggy 

 open places near tamarack-black spruce swamps. Never abundant. 



Spiranthes gracilis (Bigel.) Beck. (Ibidium gracile (Bigel.) House). 

 Slender ladies' tresses. Dry open ground near Manistique. Apparently 

 infrequent. Very probably overlooked. 



