2l6 DAVENPORT ACADEMY OF SCIENCES. 



Gymnocladus, Lam. 



196. G. Canadensis, Lam. Kentucky Coffee-tree. 



Alluvial soil along the Mississippi River; not uncommon. 



Gleditschia, L. 



197. G. triacanthos, L. Honey-Locust. 



Rich woods, especially along rivers; frequent. 



ROSACEA. 



Prunus, Tourn. 



198. P. Americana, Marshall. Wild Plum. 

 Woods ; common. 



199. P. Chicasa, Michx. Chickasaw Plum. 



Muscatine Island, near the upper end of the " Big Timber;" 

 also on the Illinois side opposite this point. 



200. P. Virginiana, L. Choke-Cherry. 



Borders of woods and banks of streams ; frequent. 



201. P. serotina, Ehrh. Wild Black Cherry. 

 Woods; frequent. 



Spiraea, L. Meadow-Sweet. 



202. S. salicifolia, L 



Low grounds ; rather common. 



203. S. lobata, Jacq. Queen of the Prairie. 



Moist prairies and boggy places of the Cedar River region; 

 infrequent. 



204. S. Aruncus, L. Goat's-Beard. 



Rich soil at Wild Cat Den and Wyoming Hill. 



Physocarpus, Maxim. 



205. P. opulifolius, Maxim. Nine-bark. 

 Moist places in hilly woods ; not frequent. 



Rubus, Tourn. Bramble. 



206. R. occidentalis, L. Black Raspberry. 

 Fence-rows and open woods; common. 



207. R. villosus, Ait. High Blackberry. 



Borders of woods, open thickets, etc.; common. 



208. R. Canadensis, L. Dewberry. 



Dry fields and borders of woods; frequent. 



