B6 



ROCKY MOUNTAIN MAPLE 



A'cer gla'brum, syns. A. ne'o-mexica'num, A. triparti'tum 



A. glabrum 



ROCKY MOUNTAIN MAPLE 



(A glabrum) 



Leaves opposite, mostly hairless (gla- 

 brous), rounded in outline, 1 to 3 

 (sometimes up to 5) in. across, thin, 

 dark green and lustrous above, paler 

 below, often marked with red, 3- to 5- 

 lobed, sometimes 3-parted to base; 

 lobes pointed or blunt, with toothed 

 edges, center lobe usually narrowed 

 and entire below the middle; indenta- 

 tions (sinuses) between lobes usually 

 deep and narrow 



Leafstalk (petiole) 1 to 6 in. long, 

 grooved, often bright red 



"Seeds" (samaras) paired, hairless, % 

 to IK in. long; wings spreading at an 

 acute or right angle, nearly straight on 

 back, often rose-colored in summer; 

 sinuses usually acute 



Twigs hairless, red, reddish brown or 

 pale greenish brown 



DOUGLAS MAPLE 

 (A douglasii ) 



Leaves opposite, hairless, thin, 1 to 

 4 in. long, about as wide, 3- to 5-lobed 

 or sometimes 3-parted; lobes taper- 

 pointed, sharply toothed on edges 

 usually to base; sinuses between lobes 

 usually shallow and open 



"Seeds" paired, hairless, % to 1J in. 

 long; wings incurved on back; sinuses 

 between wings usually rounded 



Twigs hairless, purplish or red 



