294 Karl M. Wiegand and Arthur J. Eames 



4. A. nigrum Michx. f. Black Sugar Maple. 



In more loamy gravels and in bottom lands, usually in richer soil than the last 

 preceding species ; frequent. May 12-30. 



Most abundant in the valley of Cayuga Lake and the stream valleys along its 

 eastern shores; rare elsewhere: near the mouth of Enfield Glen (D. !) and in the 

 alluvium through the glen; Negundo Woods (D.) ; lower Six Mile Creek; Indian 

 Spring (£>.!); Renwick (D. !) ; Fall Creek, n. of Forest Home; around McLean 

 Bogs ; near Chicago Bog ; Taughannock Gorge ; common in Salmon Creek valley ; 

 Paine Creek, abundant (D. !) ; Big Gully (Z). !); and elsewhere. 



W. Que. and w. N. H. to S. Dak., southw. to Ala., La., and Kans. ; rare or 

 absent on the Coastal Plain. A tree primarily of the rich soils of the Mississippi 

 Valley. 



A sufficiently distinct species, differing from A. saccharum in many characters. 



5. A. PLATANOIDES L. NORWAY MAPLE. 



Escaped from cultivation and established in Cascadilla Glen on both sides above 

 and below the campus bridge. 

 Native of Eu. 



6. A. pennsylvanicum L. Striped Maple. Moosewood. 



Damp shaded woodlands in ravines and on the tops of the higher hills, in rocky 

 gravelly neutral or acid soils; frequent. May 10-June 1. 



Tops of hills in Danby, Caroline, and Spencer ; Coy Glen ; Six Mile Creek, Fall 

 Creek, and other ravines; "cold woods on the high hills" (D. !), where it is common 

 on the lighter, more residual soils ; around McLean Bogs ; rare n. of Taughannock 

 Gorge and Shurger Glen. 



E. Que. to w. Ont., southw. to Conn, and the Great Lakes, and in the mts. to Ga. 



7. A. spicatum Lam. Mountain Maple. 



Damp thickets on ravine slopes and in rocky woods, in gravelly or rocky cal- 

 careous (?) soils; frequent. May 15-June 15. 



Especially abundant in nearly all the ravines of the basin, but mostly absent on 

 the more residual acid soils on the hilltops, where A. pennsylvanicum is common; 

 sometimes in swampy woods, as at Headwaters Swamp and Beaver Brook. 



Newf. and Lab. to Hudson Bay and Man., southw. to Conn., N. Y., Tenn., Midi., 

 and e. Iowa, and in the mts. to Ga. ; almost or quite absent on the Coastal Plain. 

 A northern plant of the Appalachian forest belt. 



8. A. Negundo L. (Negundo accroides of Cayuga Fl.) Box Elder. 

 Alluvial river banks and bottom lands ; rare. May. 



"In 'Negundo Woods' at a bend of the creek, V/2 miles south of Ithaca. Dis- 

 covered here by Professor B'ranner, when a student, June, 1873" (D.). When first 

 discovered there were about twenty trees. These have since been cut down, but 

 small trees are still present on this spot. The Ithaca station is one of the few in 

 N. Y. State for this plant. (See Dudley for fuller account.) Now widely es- 

 caped from cultivation, and in such condition frequent. 



W. N. E. to Man. and the Rocky Mts., southw. to Fla., Tex., and Mex. ; rare or 

 absent in most of N. E. and on the Coastal Plain. A tree of the rich Mississippi 

 bottom lands. 



81. HIPPOCASTANACEAE (Horse-Chestnut Family) 

 1. Aesculus L. 



1. A. HlPPOCASTANUM L. COMMON HoRSE-ChESTNUT. 



Escaped from cultivation in various places. May 15-30. 

 Native of Asia. 



