,IOWA ACADEMY OP SCIENCES. 
211 
Castalia . 
257. C . odorata .) Woodv. and Wood. {Nym- 
phcea odorata Ait.) Frequent in pools and 
swamps. 
CERATOPHYLLACE^ . 
Ceratophyllum. 
258. C. demersum L. Ponds and swamps; frequent. 
KANUNCULACE^. 
Caltha. 
259. C. palustris L. Common in bogs and wet 
meadows . 
ISOPYRUM. 
260. I. hiternatum (Raf .) T. & Gr. Frequent in moist 
woods. 
Actjea. 
261. A. (Ait.) Willd. (A. spicata rithraWiWdi.) 
Common in woods. 
Aquilegia. 
262. A. canadensis L.- Rocky woods and high river 
banks; common. 
Delphinium. 
263. D. carolinianum Walt. (Z). aznreum Michx.) Dry 
hills and prairies; common. 
Anemone . 
264. A. carolinianal^ddit. Prairies; frequent. 
2d5. A. cylindrica . Dry, open ground; frequent. 
266. A. vir giniana 1 j . Woods; frequent. 
267. A. canadensis \j . {A . pennsylvanica L.) Damp 
open ground; corhmon. 
Hepatica. 
268. H. acuta (Pursh.) Brit. {H. acutiloha DC.) 
Cold woods; common. 
Syndesmon. 
269. S. thalictroides (L.) Hoff mg. {Ammonilla ihalict- 
voider Spach.) High woods; common locally. 
