228 IOWA ACADEMY OF SCIENCES. 



POMACES. 



Malus Juss. Wild Crab-apple. 



313. M. ioensis (Wood) Britton. (Pijrus ioensis Bailey.) 



Rare in woods. 

 Amelanchier Medic. June Berry. 



314. A. ahii folia Nutt. Frequent in woods. A western 



species rarely found in this region. 

 Crat^gus L. Thorn Apple. 



315. C. punctata Jacq. Rare in woods near Iowa Lake. 



316. C. coccinea L. Our most common species. 



317. C. mollis (Torr. and Gray.) Scheele. (C suhviUom 



Schrad.) Frequent in timber. Our thorn apples 

 are much confused and perhaps include several 

 of the recently published species. 



DRUPACE^. 



a^nericana Marsh. Wild Plum. Very common 



in open woods. 



virginiana L. Choke Cherry. Very common 



in open woods. 



serotina Ehrh. Wild Black Cherry. Rare in 



woods west of Estherville. 



C^ESALPINACE.E 



Cassia L. Sensitive Pea. 



321. C. chanueci'isfa L. Common in dry sandy soil. 

 Sometimes cultivated. 



PAPiLIONACE^. 



Baptisia Vent. Wild Tndigo. 

 .322. B.hradeata Ell. {B. leacopJum ^utt) Common; 

 prairies and border of woods. 

 Melilotus J uss. 

 323. M alba Desv. White Sweet-clover. Frequent;, 

 adventive from Europe. 



