ORDER 37.-SAPINDACE^E. 73 



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



Leaves compound. Flowers dioecious. A tree. South Florida No. 9 



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, ivith the 9-31-foliate leaves.. .(6) 



b Common petiole winged between the leaflets No. 4 



b Common petiole not winged NOB. 13 



1 R. glabra L. Lvs. and branches glabrous ; Ifts. 1131, lanceolate, acuminate, 



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

 6 15f. The fruit hairs are extremely acid, and dye red. June, July. 



2 B. typhina L. Branches and petioles densely villous ; Ifts. 1131, 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. 



/3. laciniatn. Lfts. irregularly gashed ; panicles leafy. Hanover, N. H. (Bicard.) 



3 R. pumila MX. Procumbent, villous-pubescent ; Ifts. 913, oval or oblong, coarsely 



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



4 R. copallina L. Mountain Sumac. Branches and petioles pubescent ; Ifts. 9 21, 



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

 panicles ; drupes red, hairy. Rocky hills. 2 Sf. Thyrse sessile. July. 



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



ruptly acuminate, very entire ; panicles loose, axillary, pedunculate ; drupes 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 ; drupes smooth, 

 roundish. Thickets, Can. to Ga. Perhaps runs into the next. June. 



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



cating tendrils ; leaflets ovate, smooth, entire. Ascending tree?, 20 50f. Drupes 

 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 globcus, villous. Copses. 2 6f. Flowers yellowish. May. 



9 R. NIetopium L. Lfts. 37, smooth, entire, ovate, acumin. ; drupes smooth. 301. 



10 R. cotiuoides N. Smooth; Ivs. oval, obtuse, entire, acute a* base, thin, long- 

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



11 R. COTINUS. Venetian Sumac. Smoke-tree. Lvs. obovate, entire, thick; flowera 

 mostly abortive, pedicels diffusely branched and hairy. Italy. 



ORDER XXXVII. SAPINDACE^E. MAPLEWORTS. 



Trees, shrubs, or rarely herbs, 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. Flower* regular, diclinous. Fruit a double samara... (a) 



a Disk annular. Petals 4 or 5 or 0. Leaves simple, lobed ACER. 1 



a Disk obsolete. Petals none. Leaves pinnately compound NEODNDO. 3 



II. STAPHYLE M. Leaves opposite. Flowers regular, perfect. Stamens 5 STAPHYLKA. 3 



III. HIPPOCASTANE/E. Leaves opposite. Flowers irregular. Stamens 7 jEscULTJS. * 



IV SAPTN'DE.E. Leaves alternate. Flowers polygamo-dioeciou8...(6) 



4 



