284 Oeder 38.— ANAGAHDIACB^. 



trees or shrubs. Lvs. alternate, mostly compound. FIs. often, by 

 abortion, imperfect. 



§ Leaves simple. Flowers perfect (or all abortive in onltivation) Nos. 9, 10 



§ Leaves compound, Flower polygamous, (a) 



a FIs. in clustered spikes preceding the trifoliate leaves Ho. 8 



a FIs. in^xillary panicles, wUh the 8— 18-foliate leaves. Poisonous Nos. 5—7 



a Hs. in terminal thyrses, with the 9— 31-foliat8 leaves, (b) 



b Common petiole winged between the leaflets No. 4 



b Common petiole, not winged Nos. 1—3 



1 R. glabra L. Los. and branches glabrous; Ifts. 11 to 3], lanceolate, acuminate, 

 acutely serrate, whitish beneath; firred with crimson hairs. — Thiclseta and waste 

 ground, U. S. and Can. Shrub, S to 15f high, consisting of many straggling 

 branches, smooth, except its fruit. Lfts. sessUe, except sometimes the terminal 

 odd one. FIs. in terminal, thyrsoid, dense panicles, greenish-red, ? $ . Fertile 

 ovaries, clothed with grayish down, which in fruit becomes crimson, and con- 

 tains mallio acid (bi-malate of lime, Prof Rogers), extemely sour to the taste, 

 Jn., Jl. The bark of this and other species may be used in tanning. The drupes 

 dye red. 



2 R. typhina L. Branches and petioles densely mttous; Ifta. 11 to 31, oblong- 

 lanceolate, acuminate, acutely serrate, pubescent beneath ; fr. red, with crimson 

 hairs. — A larger shrub than the former, attaining the height of 20^ in rocky or 

 low barren places, Can. and TJ. S. St. with straggling, thick branches. Lvs. 

 at length 2 to 3f long ; lfts. sessile, except the terminal, odd one. FIs. in ter- 

 minal, thyrsoid, dense panicles, yellowish-green, often $ ^ or i ^ $. Drupes 

 compressed, compact, the crimson down very acid. Jn. The wood is aromatic, 

 of a sulphur-yeUow, and used in dyeing. 



/3. LAOmiATA. Lfts. very irregularly coherent and incised; panicles partly 

 transformed into gashed leaves. Hanover, N . H. (Eiokard). 



3 R. pumila Mx. Procwnibent, villous-pubesceni ; lfts. 9 to 13, oval or oblong, 

 coarsely toothed; drupes red, silky-pubescent. — In upper Carolina. Shrub, 

 creeping extensively, with branches 1 to 2f high, bearing a subsessile, terminal, 

 thyrsoid panicle. Lfts. all sessile, clothed with a velvety pubescence beneath, 

 the three upper often confluent. This species is very poisonous. 



4 R. oopallina L. Mountaut Sumac. Branches and petioles piibesceni; lfts 9. 

 to 21, oval-lanceolate, mostly entire, unequal at base, common petiole winged; 

 fls. in dense panicles ; drupes red, hairy. A. smaller shrub, not half the hight of 

 the last, in dry, rocky places, U. S. and Can. Compound petiole about 6' long, 

 expanding into a leafy margin, between each pair of leaflets. Lfts. 1 to 3' long, 

 near J as wide, dark-green, and shining on the upper surface. Panicles of & 

 terminal, sessile, thyrsoid, 9 $ , greenish. Drupes acid. Jl. 



j3. Lfls. coarsely and unequally serrate. IT. T. (Barratt.) 



5 R. venenata DO. Poison Sumac. Doo 'Wood. Very glabrous ; lfts. 7 to 13, 

 oval, abruptly acuminate, very entire; panicles loose, axillary, pedunculate; 

 dnipes greenish-yellow, smooth. A shrub or small tree of fine appearance, 10 to 

 15f high, in swamps, U. S. and Can. Trunk several inches diam., with spread- 

 ing branches above. Petioles wingless, red, 6 to 10' long. Lfts. about 3' long, 

 J as wide, sessile, except the odd one. Panicles axillary, ? $ , those of the 

 barren ones more diffuse. Pis. very small, green. Drupes as large as peas. Jn. 

 The whole plant is very poisonous to the taste or touch, and even taints the air 

 to some distance around with its pernicious effluvium. 



6 R. toxicodendron L. PoisoiT Oaic Poison Ivt. Erect^ or decumbent; lvs. 

 pubescent ; lfts. 3, broadly oval, acuminate, angular or sinuate-dentate ; fls. in 

 raoemous, axiUary, subsessile panicles; drupes smooth, roundish. — Can. to the 

 uplands of Ga. A small, weak shrub, 1 to 3f high, young branches, and lvs. 

 beneath downy. Lfts. 2 to 6' long, | as wide, petiolate, the common petiole 4 to 

 5 long. Fls. small, ? $. Drupes pale-brown. Poisonous, but less so than 

 the la.st. 



7 R. rddicans L. Cumbing Itt. Stems clunbing by means of innumerable 

 radicating tendrils; leaflets ovate, smooth, entire; fls. raoemed in axillary 

 panicles. A vigorous, woody climber, ascending trees and other objects 10 to 40 

 or 601; common in damp woods, Can. and TJ. S. The stem becomes 1' to 2' in 



