SCHOOLCRAFT COUNTY AND VICINITY 101 



Brassica nigra (L.) Koch. Black mustard. Occasional as a weed 

 about cities and villages. 



Sisymbrium officinale leiocarpum DC. Smooth-podded hedge-mus- 

 tard. A weed about dwellings and in waste places. Frequent. The 

 species with pubescent pods may yet be noticed. 



Sisymbriwn altissimum L. (Norta altissima (L.) Britton). Tumble 

 mustard. In cities and villages as a weed. Often plentiful. 



Erysimum cheiranthoides L. (Cheirinia cheiranthoides (L.) Link.). 

 Worm-seed mustard. Mostly as a weed in cities and villages. Occa- 

 sional in fields. 



Radicula nasturlium-aquaticum (L.) Britton & Rendle. True water- 

 cress. In brooks and ditches. Frequent. 



Radicula palustris (L.) Moench. Marsh cress. Wet open places and 

 often in shallow water. Frequent throughout. 



Radicula armoracia (L.) Robinson. (Armoracia armoracia (L.) Brit- 

 ton). Horseradish. Escaping into moist places of cities and villages 

 and persisting. Frequent. 



Dentaria diphylla Michx. Crinkle-root. In hardwoods. Apparently 

 infrequent. 



Cardamine pennsylvanica Muhl. Pennsylvania bitter-cress. In very 

 wet and open or shaded swampy places. Often abundant. 



Arabis lyrata L. Lyre-leaved rock-cress. On and near, the sandy 

 beaches of Lake Michigan and Lake Superior. Often plentiful. 



Arabis glabra (L.) Bernh. Tower mustard. Frequent in dry open 

 places or in open woods. 



SARRACENIACEAE. Pitcher-plant Family 



Sarracenia purpurea L. Pitcher-plant. Common in tamaraek-nlaek 

 spruce swamps. 



DROSERACEAE. Sundew Family 



Dr oser a rotundifolia L. Round-leaved sundew. Boggy open ground. 

 Frequent. 



CRASSULACEAE. Orpine Family 



Sedum acre L. Mossy stonecrop. Dry open sandy ground in and near 

 cities and villages. Sometimes covering the ground and abundant. 



Sedum purpureum Tausch. (Sedum triphyllum (Haw.) S. F. Gra; 

 Live-forever. Escaping from cultivation and persisl ing in various places. 

 Frequent. 



