No. 14.] FLOWERING PLANTS AND FERNS. I29 



Sisyrinchium atlanticum Bicknell. 



Fields, meadows and borders of salt marshes. Common 

 on and near the coast ; occasional or local inland. June. 

 Rarely occurs with white flowers. 



ORCHIDACEAE. ORCHIS FAMILY. 



CYPRIPEDIUM L. Lady's Slipper. Moccasin Flower. 



Cypripedium parviflorum Salisb. (small-flowered). 

 Smaller Yellow Lady's Slipper. 



Rare or occasional. Dry sandy or rocky woods. May — 

 June. 



The rootstock and roots are medicinal and are officinal. 



As in the following variety, contact with this plant poisons 



the skin of some people, the glandular hairs containing an 



irritant oil. 



Cypripedium parviflorum Salisb., var. pubescens (Willd.) 



Knight (downy). 

 Cypripedium pubescens Willd. 

 Cypripedium hirsutum of authors, not Mill. 

 Large Yellow Lady's Slipper. Yellow Moccasin Flower. 



American Valerian. 



Rocky woods and cold swamps. Rare in the eastern part 

 of the state and near the coast, becoming occasional or fre- 

 quent northward and westward. May — June. 



The rootstock and roots are medicinal and are offlcinal. 



C5rpripedium hirsutum Mill, (hairy). 

 Cypripedium spectabile Salisb. 

 Cypripedium reginae Walt. 

 Showy Lady's Slipper. 



Rare or local. Swamps or wet meadows : Willington (Mrs. 

 C. S. Phelps), Milford (Fames), Norfolk (Miss M. C. Sey- 

 mour), Danbury (H. C. Ryder), Cornwall (E. E. Brewster), 

 Salisbury (Mrs, C. S. Phelps). June. 



Cypripedium acaule Ait. (stemless). 



Stemless, Pink or Wild Lady's Slipper. Whip-poor-will's 



Shoe. Wild Valerian, 



Frequent. Dry open sandy or rocky woods, often under 

 evergreen trees. May — June. 



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