LEAF INDEX. 



17 



COMPOUND-ALTERNATE-PINNATE ; leaflets 5 or more. 



Stipules long and narrow, joined along petiole, leaflets 5-9. (Wild Roses) 

 Stems with spines in pairs at base of stipules. 



Spines short, hooked, leaflets mostly 7, finely serrate, wet 



shores. Rosa Carolina 27d 



Spines slender, straight, leaflets mostly 5, coarsely toothed, 



dry soil. Rosa humilis 27e 



Stems mostly without spines in pairs at base of stipules. 



Stems- unarmed or nearly so, not resinous, common. Rosa blanda 27c 



Stems very prickly, leaves often resinous or pubescent. Rosa acicidaris 27b 



Stems climbing, leaflets often only 3, southwestern. Rosa setigerd 27a 



Stems or branches prickly or bristly, shrubs. 



Leaflets 5 or 3, downy-glaucous beneath, mostly with narrow stipules. 



Twigs and petioles densely bristly, bristles weak and straight. Rubus strigosits 26b 



Twigs and petioles with stout hooked prickles, stem very 



glaucous. 

 Leaflets more than 5, without stipules. 



Margins nearly entire, prickles stout, bark aromatic. 



Rubus occidentalis 26c 



Xanthoxylum 



Americanum lla 

 33a 



Margins sharply serrate, stem erect but short and bristly. J rnlia hispida 



Leaflets 7-21, entire, or nearly so, southern shrubs. 



Petiole winged between leaflets, bases oblique, sometimes 



toothed at apex. Rhus copallina 

 Leaflets 7-13, quite entire, petiole not winged, very poisonous, 



swamps. Rhns venenata 

 Leaflets many, often > 17, serrate, shrubs or small trees, twigs coarse. (Sumacs) 



Twigs and petioles thickly soft-hairy, pale beneath, common. 

 Twigs and petioles smooth, leaflets glaucous beneath, rare. 

 Leaflets 11-17, nearly smooth, taper-pointed, a small tree, in 



swamps. 



See also (a northern shrub or tree , leaflets more downy and less 



pointed). 



Leaflets 11-19, petioles soft-downy, bark and leaves fragrant, 



large tree. 



See also (a large southern tree, leaflets sometimes > 20, petioles 



finely downy). 

 Leaflets 9 or less, finely serrate, trees. 



Leaflets mostly 5, long and taper-pointed, bark rough. 

 Leaflets 7 or 9, nearly smooth, fragrant, moist soil. 

 Leaflets 7 or 9, densely pubescent, fragrant, southern. 

 Leaflets 3 to 7, often curved, nearly smooth, southern. 

 2 



Rhus typhina 

 Rhus gldbra 



Pyrus Americana 

 Pi fr us sambucifolia 

 Juglans cinerea 



23c 

 23d 



23a 

 23b 



28d 

 28e 

 65a 



