LEAF INDEX. 



33 



.SIMPLE-ALTERNATE-SERRATE or Toothed or Crenate. Continued. (III.) 



Leaves mostly narrow and pointed, and > 2 in. long, not 

 fragrant, teeth low, often glaucous or woolly beneath, 



twigs slender, bark very bitter. (Willows) 



Woolly beneath, twigs downy, teeth irregular, or often nearly entire. 

 Margins slightly revolute, petiole about | in., shrubs. 



Downy above and on twigs, a low hoary shrub, in bogs. Salix Candida 

 Nearly smooth above, greyish below, tall shrub, often 



in dry soil. Salix humilis 

 Veins very plain, petioles about in. or more, often 



obovate, a small tree. Salix rostra,ta 

 Glaucous beneath, nearly smooth. 



Not long-tapering, not narrowly lanceolate, teeth often irregular. 

 Base and apex acute and nearly entire, sides unevenly 



toothed, very pale beneath. 



Base rounded or cordate, teeth fine, twigs yellow- 

 brown and shining. 



Teeth irregular, mostly woolly beneath, veins plain, 



often obovate, small tree. 



Base and apex acute or tapering, mostly silky beneath, 



leaves small, a shrub. 



Apex very long and slender, petiole mostly >| in., tree 



with dark bark. 



Salix discolor 

 Salix balsamifera 

 Salix rostrata 

 Salix petiolaris 

 Salix amygdaloides 



Green on both sides, nearly smooth, long-pointed. 



Very glossy, petiole stout with glands, broadly lanceolate. Salix lucida 

 Narrowly lanceolate, base mostly acute, petioles < ^ in. 

 Petiole distinct, teeth fine and close, a small tree with 



dark bark. Salix nigra 

 Nearly sessile, very narrow, teeth wide apart, a branching 



shrub. Salix longifolia 

 Petiole about ^ in. or longer, base mostly rounded, or 



subcordate. Salix cordata 

 Toothed at apex only, nearly sessile, oblanceolate, very fragrant. Myrica Gale 



Leaves' small, mostly < f in. x 1^ in. , teeth very fine, nearly 



sessile, small shrubs usually under 3 ft. in height, in swamps or poor soil. 

 Uppermost leaves very small, leathery, often rusty beneath, 



teeth not bristly. 

 Shining on both sides, teeth bristly, twigs green or yellowish. 



Pale and glaucous beneath, very low, much like the last. 



Leaves ovate, with 3 nerves from base, low shrubs, branching 



from deep-red root, in dry soil. 



Base rounded or subcordate, apex tapering, twigs and leaves 



downy. 

 See also (rare, smaller, leaves less pointed, nearly smooth). 



(SEE NEXT PAGE.) 



Cassandra calyculata 

 Vaccinium 



Pennsylvanicum 

 Vaccinium nigrum 



Ceanothus 



Americam of 

 Ceanothus ovatus 



76i 

 76g 

 76e 



76f 



76k 

 76e 

 76h 

 76b 



76c 



76d 

 67a 



49a 



43b 



43c 



1 8a. 

 1 -' 1 > 



