Rhus. ANACARDIACE^. 217 



hairs. — IfV/A/. up. 1. p. 1484; DC. prodr. 2. p. 67. R. cotiuoides, Null./ 

 in herb. (icud. Phi I ad. 



On the high rocky banks of Grand River, Arkansas, Null all! certainly 

 indigenous. --Mr. Nuttall's specimens are in fruit oidy : an examination of 

 the Hovvers will probably prove it to be distinct from R. Cotinus, a native of 

 the South of Europe and Middle Asia, but not unfrequently cultivated in 

 gardens. 



§ 2. Fhmn^s perfect, poly gavious or diascious : disk entire or lobcd: drupe 

 roundish, sometimes hairy: nut smooth or sulcate. Leaves unequally 

 pinnate or 3-foliolate ; the petiole often uinged: flowers paniclcd. — 



S U.MAC, DC. 



y^. li. lyphina (Linn.): branches and petioles densely villous; leaflets 

 11-31, whitish and more or less pubescent beneath, oblong-lanceolate, acumi- 

 nate, acutely serrate ; panicles terminal, thyrsoid ; drupes densely clothed 

 with crimson \\Mxs.—Duham. arh. 2. t. 47 ; Mich.r. ! fl. 1. p. 1S2; Ell. sk. 

 I. p. 360; DC. prodr. 2. p. 67. R. Canadense, Mill. did. R. viridiflora, 

 Poir. diet. 7. p. 504 ; DC. I. c. 



Canada ! to S. Carolina & Louisiana ! June. — A shrub, or small tree (20 feet 

 high) with spreading branches. Petioles at length 2-3 feet long. Flowers green- 

 ish-yellow, often polygamous or dioecious by abortion. Drupe compressed ; 

 the hairs very acid. Cellular tissue of the wood orange-color, with a 

 strong aromatic odor: juice resinous, copious. — Stag-horn Sumach. 



-4'^. JR. glabra (hinn.): leaves and branches glabrous; leaflets 13-31, lan- 

 ceolate-oblong, acuminate, acutely serrate, glaucous beneath ; panicles termi- 

 nal, thyrsoid; drupes red, clothed with crimson hairs. — Mich.r.! f. 1. p. 

 182 ; Ell. sk. 1. p. 361 ; Bigel.fl. Bost. ed. 2. p. US-, Hook. ft. Bor.-Am. 1. 

 p. 126. R. Carolinianum, Alill. diet. R. elegans. Ait. Kew. {ed. 1.) p. 162. 

 R. Virginicum etc., Cate.^b. Car. app. t. 4. 



In rocky or barren places, Canada ! (on the Saskatchawan, Hooker) to Georgia 

 &. Louisiana ! July-Aug. — A stout shrub, 5-18 feet high, with a resinous milky 

 juice. Leaves usually smaller than in R. typhina. Flowers often dioecious. 

 Down of the drupes very acid (the malic, according to Cozzens, in ann. lye. 

 Neio-York 1. p. 42 ; bimalate of lime,) Prof W. B. Rogers in Amer.journ. 

 pharm. (n. ser.) 1. p. 56. The leaves and branches of this and the preceding 

 species are astringent and sometimes used in tanning. — Smooth Sumach. 



3. R. puniil a (Michx.): procumbent, villous-pubescent; leaflets about 11, 

 oval or oblong, slightly acuminate, coarsely toothed, with a velvety pubes- 

 cence ; panicles terminal, thyrsoid, nearly sessile; drupes clothed with a 

 red silky pubescence.— Tl/iWi.?'.'.' f.l.p. 182 ; Pursh,fl. 1. p. 204 ; DC. I. c. 



In grassy pine barrens, Mecklenberg County, N. Carolina, Michatt.r, Nutt- 

 all ! also on the Neuse River, Schweinitz ! — An extensively procumbent 

 shrub ; the branches about a foot high. The 3 upper leaflets often confluent ; 

 the terminal one when distinct attenuate at the base.— A very poisonous 

 species. 



4. R. Copallina TLinn.): branches and petioles pubescent; leaflets 9-21, 

 oval-lanceolate or oblong, mostly acute or acuminate, shining above, pubes- 

 cent beneath, unequal at the base ; petiole winged ; panicles terminal, thyr- 

 soid, sessile, sometimes leafy ; drupes red, hairy. 



a. leaflets entire, usually acuminate. — R. Copallina, Linn.; Walt. Car. p. 

 225 ; Michx. ! fl.l.p.l82; Jacq. hort. Schmnb. 3. p. 50. /. 341 ; Ell. sk. 1. 

 ;;. 362. 



0. leaflets coarsely and unequally serrate. 



y. leaflets (about 21) small, oblong, acute at the base; obtuse and slightly 

 mucronate at the apex ; petiole narrowly winded. 



23 



-h. 



