Tkkks ok ink \(»i<riiKKX I'mikh Spaiks !!• 



• )•".. Leaves evcnl_\- piiinad- or hipinnate : axillary hud- 



superposed. 7.1. 



fil. Lobes or teeth at the hase of the leaflets with promi- 

 nent ^reeii inlands beneath; leaves pinnate, very 

 large with disagreeable odor. Ailanthus. (1!)). 



(>4. Lobes or teeth if present without green glands. (Jo. 



()•'). LeaHets glandular ])unetate; i)ith not ."(-angled; small 

 trees or .^hrubs. <><I. 



li-V LeaHets not punctate. 07. 



fill. Leaves pinnate, with stii)ular ■^piuc•>. 



Zanthoxylum. (17). 



(i(i. Leaves tritloliate, without stipular s])ines; bark with 

 disagreeable odor; axillary bufl> sui^erposcd. cov- 

 ered by the petiole base. Ptelea. (IS). 



ii7. L.ase of petiole covering the axillary buds, or if not, 

 the petioles and stems prickly; some times with 

 stipular spines. ()8. 



• i7. llase of petiole not covering the axillary buds; not 



spiny or prickly. 7('. 

 ^ii<. Leaflets entire. (>!•. 

 ()S. Leaflets serrate or dentate, simply pinnate; pith very 



large; bark resinous or milky. Rhus. (42). 

 fiS. Leaves serrate; bipinnate, petioles and stems prickly. 



Aralia. (7S). 



C)9. Leaflets mucronate, usually <)btuse; with stipular 



spines; base of petiole solid. Robinia. ('A'\). 

 CtU. Leaflets abruptl}^ acute; without stipular spines ; base 



of petiole covering the buds like a cap. 



Cladrastis. {'V2). 

 7". Lcaflet.s entire or if occasionally few-t(^othed then 



the rachis prominently winged. 71. 

 7ii. Leaflets serrate, dentate, or lobed. the rachis not 



winged. ~'2. 

 7L Leaflets decidedly ine(|uilateral, obliquel}- lanceolate 



or falcate, acuminate. Sapindus. (.'?8). 

 71. Leaflets not ine(|ui!ateral or only slightly so. not 



slender falcate, the rachis winged; twigs pul)esce!U. 



Rhus. (IJ). 

 71. Leaflets not ine(iuilateral or only .slightl>- so; not 



slender f.alcate; rachis not winged; twigs glabrous. 



Toxicodendron. (48) 



