MICHIGAN" FLORA. 15 



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., ana Detroit. Infrequent. 



NASTURTIUM 

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



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



Marsh cress. 94. palustre, DC. (***) 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. Armor acia, 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. Thaliam, Gay. C. & S. 



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



Tansy Mus- 100. canescens, Nutt. Th. 



tard. 



Shores of Gr. Lakes, etc. Pitcher, Houghton, Winchell, eU al. 



Infrequent. 



CAMELINA 

 False Flax. ioi. sativa, Crantz. C. & S. 



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



Not common. 



THALASPI 



Penny cress. 102. arvense, L. S. E. 



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



CAPARIDACEJE. 



(Caper Family.) 



POLANIS1A 



Poionisia. 103. graveolens, Raf. S. 



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



Not rare. 



VIOLACEJE. 



(Violet Family.) 



IONIDIUM 



Green violet. 104. concolor, Benth. & Hook. 0. & S. 



Hubbardston(l); Lansing— Real; Ann Arbor,— Allm. Cat.; etc. 



Scarce and local. 



VIOLA 



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



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



SSS&&M 1°G- Selkirk!!, Pamh. U. P. 



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



