284 Order 38.— ANACAKDIACE^. 



trees or shrubs. Lvs. alternate, mostly compound. Fls. often, by- 

 abortion, imperfect. 



*i leaves simple. Flowers perfect (or all abortive In cultivation) Nos. 9, 10 



I leaves compound. Flower polygamous, (a) 



a Fls. in clustered sprites preceding the trifoliate leaves ( No. 8 



a Fls. in a.xillary panicles, v>iih the 8 — IS-foliate leaves. Poisonous Nos. — 7 



a FJs. in terminal thyrses, with tho'^ — 31-foliate leaves, (b) 



b Common petiole winged between the leaflets No. 4 



b Common petiole, not "winged Nos. 1—3 



1 R. glabra L. Lvs. and Iranches glahmis ; Ifts. 11 to 31, lanceolate, acumin.^tc, 

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

 ground, U. S. and Can. Shrub, 6 to 15f high, consisting of many stragghng 

 branches, smooth, except its fruit. Lto. sessile, except sometimes the terminal 

 odd one. Fls. in terminal, thyrsoid, dense panicles, greenish-red, 9 J . Fertile 

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

 tains mallic 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 rod. 



2 R. typhina L. Brandies and petioles densely villous; Ifts. 11 to 31, oblong- 

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

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

 low barren places, Can. and U. S. St. with straggling, thick branches. Ltf. 

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

 minal, thyrsoid, dense panicles, yellowish-green, often ? J or 9 g J . Drupes 

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

 of a sulphur-yellow, and used in dyeing. 



I'i. L.4.0INIATA. Lfts. very irregularly coherent and incised ; panicles partly 

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

 8 R. pumila Mx. Procumbent, villoxis-pubescent ; lfts. 9 to 13, oval or oblong, 

 'loareely 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 bencith, 

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



4 R. copallina L. Mountain Sumac. Branches and petioles pubescent; 1ft; ?. 

 to 21, oval-laneeolate, 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. Lfta.' 1 to 3' long, 

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

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



jS. Lfta. coarsely and unequally serrate. N. Y. (Barratt.) 



5 R. venenata DC. Poison Sumac. Doa Wood. Very glabrous ; lfts. 7 to 13, 

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

 drupes greenish-yellow, smooth. A shnib 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, 

 ] as wide, sessile, except the odd one. Panicles axillary, 9 $ , those of the 

 barren ones more difluso. Fls. 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 pemicioua effluvium. ' 



6 R. toxicodendron L. Poison Oak. Polson Ivy. Erect, or decumbent ; lvs. 

 pubescent ; lfts. 3, broadly oval, acuminate, angular or smuate-dentate ; tl.s. in 

 r?.cemou.s, axillary, 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, J as wide, petiolate, the common petiole 4 te 

 6' long. Fls. small, 9 $. Drupes pale-brown. Poisonous, but less so than 

 the last. 



7 R. radioans L. Chiibing Ivy. Stems chmbing by means of innumerable 

 radicating tendrils; leaflets ovate, Bmooth, entire; fls. racemed in axillary 

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

 or 50f] comni'jii in damp woods. Can. and U. S. The stem becomes 1' to 2' ia 



