LEAF INDEX. 25 



SIMPLE-ALTERNATE-ENTIRE. Continued. 



Erect shrubs, leaves nearly sessile, petioles mostly < \ in. 

 Width mostly 1 in. or more, obtuse, twigs very tough, each 



tipped by a leaf. Dirca palustris 57a 



Resinous-dotted, smooth, oval, base acute, apex mostly 



mucronate. Gaylussacia resinosa 42a 

 Small, leathery, often rusty beneath, or finely toothed. 



swamps. Cassandra calyculata 49a 

 Scarcely woody, leaves narrow, pointed, almost sessile, in 



dry soil. HelianthemumCanadense 7a 

 Branching shrubs with slender twigs, often greenish, or 



warty, or downy. (Blueberries) 

 Very downy on leaves and twigs, leaves mostly < l in. 



x 5 in., low, in swamps. Vaccinium Canadense 43d 

 Pale or downy beneath, width not < | in., height 



often 5 ft. or more. Vaccinium corymbosum 43f 



Very pale, or glaucous beneath, rather rare shrubs of the south or far north. 

 Leaves < 1 in., rounded, veiny beneath, a low 



northern shrub. V actinium uliginosum 43g 

 Oval or obovate, length 1-4 in., apex acute, or 



tapering, southern. Vaccinium stamineum 43a 

 Oval or obovate, length 1-2 in., apex rounded or 



mucronate, southern. Vaccinium vacillans 43e 

 See also (a shrub of the far north, leaves silvery-scurfy on 



both sides). Elaeagnus aryentea 59a 



Trees or tall shrubs, petioles > in. (the trees are mostly southern). 



Petiole about 1 in. or less, some leaves lobed, aromatic tree. Sassafras officinale 55a 



Petiole about 1 in. or more, not lobed, very large, downy 



beneath, tall tree. Magnolia acuminata 2a 

 Petiole about in. or more, apex tapering, veins curved, 

 often slightly toothed, or pale-pubescent beneath, 



a small tree, common. Cornus alternifolia 34g 



See also (leaves nearly as last, rough-barked southern tree, 



in swamps). Nyssa sylvatica 35a 



Petioles J in. to ^ in., shrubs or small trees, in moist soil. 

 Leaves mostly < 2 in. x 1 in., petiole slender and often 



purplish. Nemopanthes Canadensis 14a 

 Leaves mostly > 2 in. x 1 in., base acute, apex acute, or 



tapering, pale beneath, bark very aromatic. Lindera Benzoin 56a 



Leaves obovate, length mostly > 6 in., small southern tree. Asimina triloba 4a 



