MICHIGAN ACADEMY OF SCIENCE. 155 



not yet noticed in Lambton Co., is occasionally found near Port Huron, St. 

 Clair Co., Mich. 



Aletris farinosa L. Colic-root. Star Grass. — Occasional in open prairie- 

 like ground on the delta islands of St. Clair River. A few specimens no- 

 ticed in damp ground north of Sarnia. 



Smilax herbacea L. Carrion-flower. — Frequent in moist meadows and 

 along banks of streams. 



Smilax ecirrhata (Engelm.) Wats. Upright Smilax. — Frequent in damp 

 rich woods and thickets. 



Smilax hispida Muhl. Hispid Greenbrier. — Common in open woods and 

 thickets. 



Dioscoreaceae. Yam Family. 



Dioscorea villosa L. Wild yam-root. Common in thickets. According to 

 Bulletin 89 of the U. S. Agricultural Department, Bureau of Plant Industry, 

 this should be named Dioscorea paniculata Michx. 



AmaryUidaceae. Amaryllis Family. 



Hjrpoxis hirsuta (L.) Coville. Star Grass. — Frequent and often abundant 

 in meadows and open woods. 



Iridaceae. Iris Family. 



Iris versicolor L. Larger Blue Flag. — Very common in wet places. 



Iris germanica L. Fluer-de-lis. — Inclined to escape from cultivation into 

 streets and roads and persist. 



Sisyrinchium mucronatum Michx. Michaux's Blue-eyed Grass. — Occa- 

 sional in meadows, fields, and open woods. 



Sisyrinchium angustifolium Mill. Northern Blue-eyed Grass. — Frequent 

 in meadows, fields, and damp sandy ground. 



Sisyrinchium granineum Curtis. Common Blue-eyed Grass. — Frequent in 

 damp meadows. 



Orchidaceae. Orchid Family. 



Cypripedium arietinum R. Br. Ram's Head Lady's Shpper. — Occasional 

 in sandy shaded ground among small oaks and poplars at Port Franks. A 

 few small specimens found growing on sand dunes. First noticed by Miss 

 Maggie McKinley of Sarnia. 



Cj^ripedium parvifiorum Salisb. Smaller Yellow Lady's Slipper. — Fre- 

 quent in very wet and marshy ground. 



C5rpripedium parvifiorum pubescens (Willd.) Knight. Larger Yellow 

 Lady's Shpper. — Frequent in rich woods and thickets. Small specimens in 

 sand noticed at Port Franks. Becoming scarce. 



Cypripedium candidum Muhl. Small White Lady's Slipper. — Frequent 

 in damp places on the delta islands of St. Clair River. A few specimens 

 noticed north of Sarnia. 



Cypripedium hirsutum Mill. Showy Lady's Slipper. — Formerly abun- 

 dant in swamps and borders of damp woods. Now very scarce and liable to 

 become extinct from constant picking. 



Cypripedium acaule Ait. Stemless Lady's Shpper. — Occasional in dry 

 open woods. 



Orchis spectabiUs L. Showy Orchis. — Occasional in rich woods and 

 thickets. 



