TUSCOLA COUNTY 193 



FUMARIACEAE. Fumitory Family 



D icentra cucullaria (L.) Bernh. Dutchman's breeches. Rich shaded 

 ground. Frequent. 



Dicentra canadensis (Goldie) Walp. Squirrel corn. In rich shad d 

 ground near Murphy's Lake. Probably frequent throughout. 



Cordalis sempervirens (L.) Pers. Pale corydaiis! Dry open placi 

 especially burned over ground. Frequent. 



CRUCIFERAE. Mustard Family 



Alyssum alyssoidcs L. Yellow alyssum. Frequent as a weed along 

 roads and in villages. 



Thlaspi arvense L. Field penny-cress. Waste places about cities and 

 villages. Frequent. 



Lepidium virginicum L. Wild peppergrass. Common as a w< sed along 

 roads and about farm buildings. 



Lepidium apetalum Willd. Apetalous peppergrass. Common a'ong 

 roads, railroads and a weed in cultivated fields. 



Capsella bursa-pastoris (L.) Medic. Shepherd's purse. A common 

 weed in all cultivated grounds. 



Camelina sativa (L.) Crantz. Gold-of-pleasure. Along railroads and 

 in waste places of cities and villages. Frequent. 



Cakile edentida (Bigel.) Hook. American sea rocket. In sand along 

 the beach of Saginaw Bay, often growing below the wave line. 



Raphanus raphanistrum L. Wild radish. Jointed charlock. ' Escaped 

 in sandy places near dwellings." C. A. Davis. 



Brassica arvensis (L.) Ktze. Common mustard. Charlock. A com- 

 mon weed in grain fields and waste places. 



Brassica nigra (L.) Koch. Black mustard. "Cultivated and waste 

 land." C. A. Davis. 



Conringia oricntalis (L.) Dumart. Hare's ear mustard. Along 

 railroads and in waste places of cities and villages. 



Sisymbrium officinale leiocarpum DC. Smooth podded hedge-mus- 

 tard. A common weed along roads and about farm built linn 



Sisymbrium altissimum L. Tumble mustard. Noticed along the 

 road near Murphy's Lake and in villages. Spreading. 



Erysimum cheiranthoides L. Worm-seed mustard. A weed along 

 roads, about farm buildings and in cultivated grounds. 



Radicula nasturtium-aquaticum (L.) Britten & Rendle. True water 

 cress. In ditches and small streams. Abundant in a small stream west 

 of May ville where it climbed three feet and more upon willows like 

 a vine. 



Radicula palustris (L.) Moench. Marsh cress. Frequenl and often 

 abundant in ditches and wet marshy places. 

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