FARWELL ON THE FLORA OF DETROIT. 49 



FAMILY 41. CRUCIFER-'E. Mustard Family. 



138. LEPIDIUM, Lin. 



388. campestre, Lin. Cress. On waste places on Belle Isle, etc. Rare. 



389. Virginicum, Linn. Peppergrass. Roadsides on Belle Isle, etc. Fre- 



quent. 



390. apetalum, Willd. With the last, but more common. 



139. COCHLEARIA, Lin. 



391. Armoracia, Lin. Horseradish. Waste places at Detroit. Frequent. 



140. SISYMBRIUM, Lin. 



392. officinale (Lin.) Scop. Hedge Mustard. Waste places on Belle Isle, 



etc. Common. 



141. SINAPIS, Lin. 



393. alba, Lin. White Mustard. Ballast grounds on Belle Isle and main- 



land. Common. 



142. BRASSICA, Lin. Turnip, Rutabaga, etc. 



394. nigra (Lin.) Koch. Black Mustard. Belle Isle. Rare. 



395. juncea (Lin.) Cosson. India Mustard. On Belle Isle. Common. 



396. arvensis (Lin.) B. S. P. Charlock. Belle Isle. Common. 



397. campestris Lin. Turnip. On ballast grounds at Detroit. Frequent. 



143. DIPLOTAXYS. DC. 



398. muralis (Lin.) DC. On ballast grounds at Detroit. Common. 



144. RAPHAXUS, Lin. Radish. 



399. Raphanistrum, Lin. White Charlock. On ballast ground at Detroit. 



Rare. 



145. BARBAREA, Ait. f. 



400. stricta, Andrz. Winter Cress. Near Palmer Park. Rare. 



146. RORIPA, Scop. 



401. sylvestris (Lin.) Bess. Water Cress. Ditches and roadsides at 



Detroit. Common. 



402. palustris (Lin.) Bess. Moist grounds on Belle Isle. Common. 



403. hispida (Desv.) Britt. With the last. Common. 



147. CARDAMIXE, Lin. 



404. hirsuta. Lin. Bitter Cress. Moist places on Belle Isle. Rare. 



405. Pennsylvanica, Muhl. Moist places on Belle Isle and elsewhere. 



Common. 



406. purpurea (Torr.) Britt. Moist woods on Belle Isle. Common. 



407. bulbosa (Screb.) B. S. P. At Linden Park. Frequent. 



148. DENTARIA, Lin. Pepper-root. 



408. laciniata, IMuhl. Toothwort. Moist woods on Belle Isle. Common. 



149. Bursa, Weber. Shepherd's Purse. 



409. Bursa-Pastoris (Lin.) Britt. Roadsides, etc., on Belle Isle, etc. 



Common. 



150. CAMELINA, Crantz. 



410. sativa (Lin.) Crantz. False Flax. Waste places on Belle Isle, etc. 



Frequent. 



151. SOPHIA, Adans. Tansy Mustard. 



411. pinnata (Walt.) Britt., var. brachycarpa (Richards.) Sisym- 



brium hrachycarpon Richards. Frank. Journ. 744:1823. Leaves 

 stems, and inflorescence sparsely glandular, otherwise glabrous: 

 pods uni- or bi-seriate even on the same plant. Intermediate be- 

 tween S. pinnata and S. incisa. Roadsides on Belle Isle. Common. 



7 



