IOWA ACADEMY OF SCIENCES. 
233 
ACERACE^. 
Acer L. 
367. A. saccharinum L. ( A . clasycarpum Ehrh.) Soft 
Maple. Frequent on river banks, and very com- 
mon in cultivation. 
368. A. nigrum, Michx. (A. saccharinum var. nigrum 
Torr. and Gray.) Hard or Sugar Maple. Com- 
mon in woods, preferring dryer ground than the 
preceding species. 
BALSAMINACEiE. 
Impatiens L. 
369. 1 . biflora Walt. (/. fulva Nutt.) Spotted Touch- 
me-not. Springy places in woods. 
370. I. aurea Muhl. (I. pallida Nutt.) Pale Touch- 
me-not. With the preceding, and more com- 
mon. 
RHAMNACE^E. 
Ceanothus L. 
371. C. americanus L. New Jersey Tea. 
shrub, frequent on dry prairies. 
A 'pretty 
VITACE^E. 
Vitis L. Wild Grape. 
372. V. vulpina L. (V. riparia Michx.) Very common 
in woods and artificial groves. 
Parthenooissus Planch. 
373. P. quinquefolia (L.) Planch. ( Ampelopsis quinque- 
folia Michx.) Virginia Creeper. Common in 
woods, and also in cultivation. 
tiliace^e;, 
Tilia L. Basswood. 
374. T. americana L. Common in low woods. The 
sweet scented flowers much frequented by bees. 
