LEAF INDEX. 



27 



SlMPLE-ALTERNATE-LOBED. 



Pinnately lobed, long and narrow, fragrant, fern-like shrub. 

 Climbing or trailing, leaves large, mostly cordate. 



Margin sharply serrate, lobes and notches acute, nearly smooth. 



Margin toothed, lower surface white-woolly or rusty-woolly. 



Lobes not toothed, petiole attached to lower surface of blade. 



See also (a climber escaped from cultivation, lobes irregular and 



entire). 

 Lobes pinnate, sinuses acute, small trees or tall shrubs, thorny. 



Leaves nearly smooth, teeth tipped with fine brown glands. 

 Base obtuse or cordate, leaves broadly ovate, petiole slender. 

 Base acute or wedge-shaped, thorns mostly < 2 in. long. 



Base acute or wedge-shaped, thorns > 2 in., petioles stout. 



Myrica asplenifolia 67b 



Vitis riparia 19b 



Vitis aestivalis 19a 



Me nispermi im 



Canadense 5a 



Solarium Dulcamara 54a 

 (Hawthorns) 



Cratcegus coccinea 

 Cratcegus 



rotundifolia 

 Cratcegus 



macracantha 



29a 



29c 



29b 



Cratcegus mollis 29d 

 Cratcegus tomentosa 29e 

 (Gooseberries) 

 Ribes lacustre 31c 



Kibes cynosbati 3 la 



Ribes oxyacanthoides 31b 

 (Currants mainly) 

 Ribes prostratum 31d 

 Ribes floridum 3 1 e 



Ribes Hudsonianum 31f 





Leaves, twigs and petioles very pubescent. 



Base obtuse or cordate, teeth tipped with fine glands. 



Base acute or wedge-shaped, teeth without glands. 

 Stems spiny or prickly, lobes palmate, sinuses acute, not tall. 

 Spines mostly 3 or more at leaf -bases, branches bristly, swamps. 

 Spines 1-3 at leaf-bases, prickles weak and scattered, dry soil. 

 Spines mostly solitary and pale, branches nearly unarmed, wet soil. 

 Stems unarmed, lobes palmate and serrate, sinuses acute, shrubs. 

 Stems reclining, leaves ill-scented when crushed. 

 Leaves resinous-dotted beneath, length and width nearly equal. 



See also (rare and northern, leaves broader than long, swamps). 

 Leaves downy beneath, not resinous, base cordate, wet soil. 

 Leaves smooth, bark in layers, height 3-10 ft. gravelly shores. 

 Leaves large, hairy or slightly bristly, stipules narrow, lobes 



tapering. 



Lobes pinnate, sinuses rounded, branches unarmed, large trees. 

 Lobes acute and bristle-pointed, often with a few bristly teeth. 



Lobes mostly 8 or more, usually toothed, a common tree. 



Lobes mostly 6 or 8, sinuses deep, shining above, southern. 



Very deeply lobed, much toothed, shining, in wet soil, southern. 



Lobes obtuse and rounded, large trees. 



Smooth and pale or slightly glaucous beneath, mostly in dry soil. 

 White-hoary beneath, sinuses deep, low ground and shores. 

 Margin mostly wavy, soft-downy beneath, southern tree, swamps. 



Lobes irregular, some leaves merely toothed or entire, southern trees. 



Lobes palmate, apex notched, sinuses rounded, a large tree. Liriodendron 



Ribes rubrum 

 Spircea opulifolia 



Rubus odoratus 

 (Oaks) 



Quercus rubra 

 Quercus coccinea 

 Quercus palustris 



Quercus alba 

 Quercus macrocarpa 

 Quercus bicolor 



31g 

 25c 



26a 



7 



73 



73i 



73b 

 73c 



Lobes palmate, pointed, apex tapering, very broad, a large tree. 

 Margin entire or 1-3 lobed, petiole slender, aromatic tree. 

 Margin sharply serrate, nearly smooth, length not > 3 in. 

 Margin toothed, very rough to touch above, downy beneath. 

 See also (tree with nearly smooth leaves, escaped from gardens). 



Tulipifera 3a 

 Platanus occidental 64a 

 Sassafras officinale 55a 

 Pyrus coronaria 28a 

 Morus rubra 63a 



Morus alba 63b 



