ORDER 37. SAPINDACE^. 73 



5 Leaves simple. Flowers perfect (or all abortive in cultivation) Nos. 10, 11 



S Leaves compound. Flowers dioecious. A tree. South Florida No. 3 



$ Leaves compound. Flowers polygamous., .(a) 



a Flowers in clustered spikes preceding the trifoliate leaves No. 8 



a Flowers in axillary panicles, with the 3-13-foliate Ivs. Poisonous Nos. 57 



a Flowers in terminal thyrses, with the 9-31-foliate leaves. . .(b) 



b 'Common petiole winged between the leaflets No. 4 



b Common petiole not winged Nos. 13 



I II. si'liibra L. Lvs. and branches glabrous; Ifts. 11 31, lanceolate, acuminate, 



acutely serrate, whitish beneath ; fr. red, with crimson hairs. Thickets and pastures. 

 ii 15f. The fruit hairs are extremely acid, and dye red. June, July. 

 Si 1C. typlilna L. Branches and petioles densely villous; Ifts. 11 31, oblong-lanceo- 

 late, acuminate, acutely serrate, pubescent beneath ; fruit red, with crimson hairs. 

 Rocky soils. 10 20f. Branches thick, straggling. Drupes acid. Wood yellow. June. 

 ft. laciniata, Lfts. irregularly gashed ; panicles leafy. Hanover, N. H. (Ricard.) 



3 R. p ii m II a MX. Procumbent, villous-pubescent ; Ifts. 9 13, oval or oblong, coarsely 



toothed ; drupes red, silky pubescent. N. Car. to Qa. Branches If high. 



4 R. copallina L. Mountain Sumac. Branches and petioles pubescent ; Ifts. 921, 



oval-lanceolate, mostly entire, unequal at base, common rachis winged ; fls. in dense 

 panicles ; drnpes red, hairy. Rocky hills. 2 8f. Thyrse sessile. July. 



5 R. venenata DC. Poison Sumac. Dog-wood. Very glabrous ; Ifts. 7 13, oval, at>- 



raptly acuminate, very entire; panicles loose, axillary, pedunculate ; drapes greenish- 

 yellow, smooth. Swamps. 10 15f. Flowers green. Very poisonous. June. 



6 R. Toxicodendron L. Poison Oak. Poison Ivy. Erect, or decumbent ; Ivs. pu- 



bescent ; Ifts. 3, broadly oval, acuminate, angular, or sinuate-dentate ; drapes smooth, 

 rouudit-h. Thickets, Can. to Ga. Perhaps runs into the next. June. 



7 R. radicans L. Climbing Ivy. Stems climbing by moans of innumerable radi- 



cating tendrils ; leaflets ovate, smooth, entire. Ascending trc-isp. 20 50f. Drapes 

 dull white. Stems 12' in thickness. June. 



8 R. aromatica Ait. Sweet Sumac. Lfts. sessile, incisely creuate, pubescent be- 



neath, lateral ones ovate, terminal one rhomboid ; fls. in close aments, preceding the 

 leaves ; drupe globous, villous. Copses. 2 6f. Flowers yellowish. May. 



9 R. Metoplnm L. Lfts. 37, smooth, entire, ovate, acumin. ; drapes smooth. 301 



10 R. cotlnoldes N. Smooth; Ivs. oval, obtuse, entire, acute at base, thin, long- 

 stalked : fls. minute, in loose, erect panicles; drupes smooth. Mts. Car. to Ark. 



II R. COTINUS. Venetian Sumac. Smoke-tree. Lvs. obovate, entire, thick; floweis 

 mostly abortive, pedicels diffusely branched and hairy. Italy. 



ORDER XXXVII. SAPINDACE^E. MAPLEWORTS. 



Trees, shrubs, or rarely Jierbs, with simple or compound, alternate or 

 opposite leaves. Flowers mostly unsymmetrical, often irregular, 4 or 5- 

 merous, with the sepals and petals both imbricated in the bud, with the 

 stamens 5 to 10, inserted on a hypogynous or perigyiious disk. Ovary 2 or 

 3-celled, lobed, and with 1 or 2 (rarely more) ovules in each cell. Embryo 

 mostly curved or convoluted, with little or no albumen. Figs. 100, 224, 

 230, 236, 237, 308, 312, 444, 515. 



I ACERINE^E. Leaves opposite. Flowers regular, diclinous. Fruit a doable samara.. .(a) 



a Disk annular. Petals 4 or 5 or 0. Leaves simple, lobed ACER. i 



a Disk obsolete. Petals none. Leaves pinnately compound NKOUNDO. 1 



II. STAPHYLE^E. Leaves opposite. Flowers regular, perfect. Stamens 5 STAPHTLEA. S 



III. HIPPOCASTANEjE. Leaves opposite. Flowers irregular. Stamens 7 ..fiscuLUS. 



IV SAPINDE/E. Leaves alternate. FUwers polygamo-dio3cious...(6) 



