104 MISSOURI BOTANICAL GARDEN. 



gray, on old trunks falling away in large flakes so as to 

 expose the brown inner layers; branches smooth, gray; 

 twigs glabrous, reddish, with scattered pale brown elongated 



lenticels which are crowded and very prominent on dwarf 

 shoots; buds red or brown, the inner scales of flower buds 

 red tomentose above on the back. — New Brunswick to 



Florida 



(Red 



5 



com 



pact growth. Bark thinner, dark gray 

 arating in large flakes; branches smo 



o 



but 



almost 

 : buds 



often nearly black. — New Brunswick and Canada to 

 Dakota, Missouri, Eastern Texas, and the South Atlantic 

 States. Not separable from the Silver Maple by its twigs, 



trunk 



gnized when 



Var. Drummondii (Hook. & Arn.) Sargent (Woolly 

 Swamp Maple). — Large tree. Bark about as in the type, or 

 even whiter and smoother; twigs gray, densely covered 

 above with white wool, as are the buds. — Swamps, Georgia 

 to the Gulf, west to Texas, and thence northwards to 

 southeastern Missouri. 



Group V. Hard or Sugar Maples (Plate 16). 



Buds nearly sessile, gray to brown or black: exposed scales 8 to 16. 



A. grandidentatum Nuttall (Western Hard Maple). 

 Small tree. Bark thin for the group, light gray, smooth 

 or finally separating in thickish flakes about 2 in. long; 

 twigs glabrous, dark red, with scattered very small pale 

 lenticels, at length striate and gray ; buds conical, acute, 

 nearly black, the scales often sharp-pointed and the upper 

 more or less silvery pubescent. — Montana to the mountains 

 of Nevada, New Mexico, Southern Texas and Mexico. 



A.saccharum Marshall (Sugar Maple). — Large round- 

 topped tree. Bark thick, gray, rough ; twigs buff, more or 



17 



