226 IOWA ACADEMY OF SCIENCES. 



289. A. hracln/ca7-j)a {Torr. &(jYay) Britton. [A.confinh 



S, Watson; A. dnuHuioiidii (Jray.) Common in 

 dry woods. 



Erysimum L. 



290. E. cheiranthoidcs L. Worm-seed. Common in 



woods. 



CAPPARIDACE^. 

 POLANISIA Raf. 



291. P. tracJii/>!pen)i(( Torr. & Gray. Common along 



shores of lakes, growing in sand. The plant has 

 a strong, offensive odor. 



crassulace^. 

 Penthorum L. 



292. P. sedoules L. Common in low ground and 



marshes. 



saxifragace^. 

 Heuchera L. 



293. //. hispida Pursh. Dry prairies; infrequent. 

 Parnassia L. Grass of Parnassus. 



294. P. caroliniana Michx. A very pretty plant, once 



common on low prairies, but rapidly disappear- 

 ing. 



GROSSULARIACE^. 

 RiBES L. 



295. B. cynoshati L. Prickly Gooseberry. Infrequent 



in woods. 



296. B, gracile Michx. Smooth-fruited Gooseberry. Very 



common in woods. The fruit sometimes sold 

 in the market. 



297. B. floridum L'Her. Wild Black Currant. Very 



common in woods. The fruit, resembling the 

 black currant of the garden in flavor, is liked 

 by some people. 



ROSACEA. 



tSpiR^A L. Meadow-sweet. 



298. S. salicifolia L. A pretty little shrub, common in 



woods, and low prairies. 



