26 C. K. Dodge 



cruciferab; 



Alyssum alyssoides L. Yellow Alygsum. — Dry ground in and about 

 cities and villages. Frequent throughout. 



Lepidium virginicum L. Wild Peppergrass. — A common weed in culti- 

 vated grounds, on roadsides, and in and about cities and villages. 



Capsella Bursa-pastoris (L.) Medic. (Bursa bursa-pastoris h., Britton). 

 Shepherd's Purse. — A common weed in cultivated grounds and in and about 

 cities and villages. 



Cakile edentula (Bigel.) Hook. American Sea Rocket. — On and near 

 sandy beach of Lake Superior near Huron Mountain Club. Common on 

 the sandy beaches of the Great Lakes. 



Brassica arvensis (L.) Ktze. (Sinapis arvensis L.). Wild Mustard, 

 Common Mustard. — A bad weed in grain fields, and frequent about cities 

 and villages. 



Sisymbrium officinale leiocarpum DC. Smooth-podded Hedge Mustard. 

 — A common weed on roadsides and in waste places of cities and villages 

 throughout. Included in Brysimmn officinale L. in Britton & Brown. 



Sisymbrium altissimuiv h. (Norta altissima L., Britton). Tumble Mus- 

 tard. — A weed about cities and villages and along railroads throughout. 

 Plentiful. 



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

 Wormseed Mustard. — A weed along railroads, in fields, and waste places of 

 cities and villages. Frequent. 



Radicula Nashirtium-aquaticum (L.) Britton & Rendle. (Sisymbrium 

 nasturtium-aquMticum L.). True Water Cress. — Creeks and ditches about 

 Marquette and Big Bay. Plentiful. 



Radicula palustris (L.) Moench. Marsh Water Cress. — Wet open- 

 places or in shallow water near Huron Mountain Club. Frequent through- 

 out. 



Radicula Armoracia (L.) Robinson. (Armoracia armoraciah., Britton), 

 Horseradish. — Noted throughout in damp open ground about and in cities 

 and villages. 



Dentaria diphylla Michx. Two-leaved Toothwort, Crinkle-root. — Rich 

 shaded ground near Big Bay. Probably frequent throughout. 



Dentaria laciniata Muhl. Cut-leaved Toothwort — Rich shaded ground 

 along Salmon Trout River near Huron Mountain Club. Probably frequent 

 throughout. 



Cardamine parviflora L. Small-flowered Bitter Cress. — Rocky summit 

 of Huron Mountain. Probably to be found in similar situations throughout. 

 Noted by B. Gladewitz. 



Cardamine pennsylvanica Muhl. Pennsylvania Bitter Cress. — Along 



Salmon Trout River near Huron Mountain Club. Apparently infrequent. 



Arabis lyrata L. Lyre-leaved Rock Cress. — On sandy beaches and 



shores, and on rocky hills about Huron Mountain Club. Probably plentiful 



throughout. 



