MICHIGAN FLORA. 439 



LEPIDIUM 



wild pepper- 90> virginicum, L. Th. 



wild p.-grass. 91. intermedium, Gr. Th. 



This and the preceding are both very common in fields and -waste places, 

 but usually not together. 



Pepper-wort. 92. campestre, R. Br. S. E. 



Macomb Co., and Detroit. Infrequent. 



NASTURTIUM 

 True water- 93. officinale, R. Br. (***) C. & S. 



PrGSS 



■ Ionia(!); Ann Arbor; South Haven; etc. Frequent in brooks. 



Marsh cress. 94. palustre, DO. (***) Th. 



Frequent. 



Hairy m. Cress. 95. palustre, DC, var. hispidum, Fisch. & Mey. Th. 



Lake cress. 96. lacustre, Gr. C. & S. 



From Fish Cr. (!) and Maple R. (!) southward. Frequent. 



Horseradish. 97. Armoracia, Fries. (***) 



Used in spring as a condiment. Escaped from gardens into waste places. 



Frequent. 



SISYMBRIUM 



Hedge Mus- 98. officinale, Scop. (***) 



Road- sides and wet places. Frequent. 



Mouse-ear 99. Thaliana, Gay. C. & S. 



In light sand; generally mistaken for Arabis lyrata. Common. 



Tansy Mus- 100. catiescens, Mutt. Th. 



tard. 



Shores of Gr. Lakes, etc. Pitcher, Houghton, Winchell, et. at. 



Infrequent. 



CAMELINA 



False Flax. loi. sativa, Orantz. C. & S. 



Road- sides and waste places. Flint; Ann Arbor; Macomb Co. ; etc. 



Not common. 



TIIALASPI 



Penny Cress. 102. awense, L. S. E. 



Ann Arbor— Allmend Cat. ; "Shores of Lake Huron."— Gray. Rare. 



CAPARIDACE^E. 



{Caper Family.) 



POLANISIA 



Poionisia. 103. graveolens, Raf. S. 



Shores of Gr. Lakes; South Haven; Detroit(!); Put-in P»ay(!), etc. 



Not rare. 



violace^:. 



{Violet Family.) 



IONIDIUM 

 Green Violet. 104. concolor, Benth. & Hook. O. & S. 



Hubbardston(!); Lansing— Beal; Ann Arbor,— AUm. Cat.; etc. 



Scarce and local. 



VIOLA 



Round-leaved 105. rotundifolia, Mx. U. P. 



Violet. ' 



Sugar Island— Winch. Cat.; Michigan— Gray. 



li'ea^uTred ™ 6 - Selkirkii, Pursh. TJ. P. 



V. Gillman, Gray, et al. A high northern plant. 



