26 
190. A. sacchaPinum, Wang. Sugar Maple. Hard or Rock Maple. 
Rich and open woods; infrequent or rare south, more common 
north. April — May. 
191. A. dasycarpum, Ehrh. Soft, River, White or Silver Maple, 
vf Damp woods, and banks of streams and lakes; frequent. 
Very commonly cultivated as a shade tree. 
192. A. rubrum, L. Red, Swamp or Soft Maple. 
Swamps or wet woods ; frequent north. April — May. 
Used extensively as a shade or ornamental tree. 
I*. 
NEGUNDO, Moench. 
193. N. aceroides, Moench. Ash-leaved Maple. Box-elder. 
Banks of streams, lakes and moist open woods; not common. 
April — May. (B.) 
Evanston. Hog Island, Brennan/ Englewood, Williams. Whiting, 
Ind., Brennan, 
Cultivated, to some extent, for ornamental purposes. 
STAPHYLEA, L. 
194. S. trifolia, L. American Bladder-nut. 
Wet and rather dark woods; not rare. May — June 15th. 
0\ Hyde Park. Banks of the Desplaines River, Babcock. Northwest. 
AN AC ARDI ACEiE. 
RHUS, L. 
T 195. R. typhina, L. Staghorn Sumach. 
Sandy soil; not common. June — July. (B.) 
Calumet Region. South Chicago and south, on sand ridges, 
frequent or rare northward. 
In- 
196. R. glabra, L. Smooth Sumach. 
^ Fields, etc. ; frequent. May — June. / ! / 
197. R. eopallina, L. Dwarf Sumach. 
Probably infrequent, except locally. 
A single clump has been noted near Summit. The leaflets were entire. 
Calumet, 1886. Miller’s and Gibson’s,' Ind., Babcock ! Hog 
Island, Brennan. * 
198. R, venenata, D C. Poison Sumach. Dog-wood. Poison Elder. 
Swamps, especially south; not common. June — July. 
Calumet, July, 1886. Miller’s, Ind., north to South Chicago. 
Graceland, Babcock. Hog Island, Brennan. 
