MICHIGAN ACADEMY OF SCIENCE. 
175 
199. Sisymbrium officinale (Lin.) Scop., Yar. leiocarpum, D. C. Hedge 
Mustard. Smooth siliques. 
The common form and very plentiful everywhere in waste 
grounds. 
200. Brassica arvensis (Lin.) B. S. P. Charlock. 
A weed in w r aste grounds. 
201. Brassica arvensis (Lin.) B. S. P. Var. orientals, (Lin.) Sinapsis 
orientalis, Lin. Cent. Plant I. 53, Am. Ac. IY, 280, 1759. 
Differs from the species in having the siliques pedicles and the 
plant more or less retrose hispid. 
Not so common, but in similar situations. 
202. Barbarea Barbarea (Lin.) MacM. Yellow Cress. 
Low grounds. Frequent. 
203. Barbarea Barbarea (Lin.) MacM., Yar. longisiliquosa (Carion). 
Barbarea vulgaris, Var. longisiliquosa Carion, 1859 according 
to Fernakl in Rhodora XI, 139, 1909. 
Differs in having the siliques oppressed to the rachis. 
Low r grounds. Common. 
201. Coclilearia Armoracia, Lin. Horseradish. 
Low grounds. Frequent. 
A commercial drug. The root is a well known condiment. In 
medicine it is used in chronic atony of the digestive apparatus, 
and externally as a. rubefacient. 
205. Radicula Nasturti um-aq u:a ticum (Lin.) Britten and Rendle. 
Water Cress. In streams. Common. 
206. Cardamine bulbosa (Schreb.) B. S. P. Bitter Cress. 
Open wet woods. Frequent. 
207. Cardamine pratensis, Lin. Cuckoo-flower. 
Low wet grounds. Rare. 
208. Bursa Bursa-pastoris (Lin.) Britton. Shepherd’s Purse. 
Waste grounds. Common. 
A commercial drug and employed as an astringent in diarrhoea, 
etc. 
209. Camelina microcarpa. Andrz. False Flax. 
Waste grounds. Common. 
210. Camelina sativa (Lin.) Crantz. False Flax. 
Waste grounds. Frequent. 
211. Arabis laevigata (Muhl.) Poir. Rock Cress. 
Sterile grounds. Rare. 
212. Alyssum alyssoides, Lin. Yellow Alyssum. 
Waste grounds. Common. 
Order XIX. Sarraceniales. 
Family 36. Sarraceniaceae. 
213. Sarracenia purpurea, Lin. Pitcher Plant. 
Marl bogs. Common. 
A commercial drug. The rhizome is used as a stimulant tonic 
in diarrhoea, dyspepsia, etc. 
Order XX. Rosales. 
Family 37. Sedaceae. 
214. Penthorum sedoides, Lin. Ditch Stonecrop. 
Ditches. Frequent. 
A commercial drug under the name of Yirginia Stonecrop. 
