PLANTS OF IOWA 181 



SENNA FAMILY. 



CERCIS, L. 



2331. C. canadensis, L. Red Bud. 



Common on bluffs, along the Mississippi; south. 

 CASSIA, L. 



2332. C. chamcecrista, L. Partridge Pea. 

 A common weed, in dry soils. 



2333. C. marylandica, L. Wild Senna. 

 Common in damp soil. 



2334. C. tora, L. Low Senna. 

 Introduced; rare. 



GLEDITSIA, L. 



2335. G. triacanthos, L. Honey Locust. 

 Frequent in rich woods. 



GYMtyocLADus, Lam. 



2336. G. dioica, (L.) Koch. Kentucky Coffee-tree. 

 Not common, in rich woods. 



PAPILIONACE^;. PEA FAMILY. 



BAPTISIA, Vent. 



2337. B. tinctoria, (L.) E. Br. Wild Indigo. 

 In dry soil, infrequent. 



2338. B. bracteata, Ell. Large-bracted Wild Indigo. 

 Open places. 



2339. B. alba, (L.) R. Br. White Wild Indigo. 

 Rare; south. 



2340. B. leucantha, T. & G. Wild Indigo. 

 Common on rich prairies. 



CROTALARIA, L. 



2341. C. sagittalis, L. Rattle-box 

 In dry soil, frequent. 



LUPINUS, L. 



2342. L. perennis, L. Wild Lupine. 

 Not common. 



MEDICAGO, L. 



2343. M. sativa, L. Alfalfa. 

 Introduced from Europe. 



