RHUS. PENTANDRTA. TRIGYNTA. 32S 



A shrub 8—15 feet hisrh, the last year's branches very villous. 

 Leaves puinate ; leaflets 10 — 15 pairs, sessile, whitish beneath, 

 with distant serratures ; petiole 2 feet or more in length. 

 Flonvera polygamous ? in large oblong dense panicles, greenish- 

 yellow. Berries entirely covered with a purple villus. 



Hab". Among rocks in hilly situations, and in thickets ; com- 

 mon. June. Stag'a.horn. 



3. R. copalUnum L. : petiole winged ; leaflets in manj 

 pairs, oval-lanceolate, very entire, shining on the upper sur- 

 face; panicle sessile ; flowers dioecious. Willd, Spec. I. 

 p. 1480. Jac^. //or/. Sc/ioen, Ilf. p.50. t. 341. Mich. 

 Fl. I. p. 182. Pursh FL I. p. 205. Big. Bost. p. 72. 

 Elliott Sk, 1. p. 362. Walt. Car. ^. 255. Roem, ^^ 

 S c h u 1 1. VI. p. 647. P I u k. Aim. 31 8. t. 56. f. 1. 



A small shrub, witli terete pubescent branches. Leaves pinnate, 

 dark green ; leaflets 4 — 6 pairs, with an odd one, acute at each 

 extremity, pubescent on the under surface; petiole with a 

 broad winged margin, which is contracted at the insertion of 

 the leaflets. Panicle smaller than in the preceding species, 

 pyramidal. Pefa/s greenish-yellow, berries red, small, com- 

 pressed, hairy, and of a pleasant acid taste. 



Hab. In dry woods and on hill sides. July. Mountain Sumachs 



4. R. VernixL.: very smooth; leaflets in many pairs, 

 oval, abruptly acuminate, entire ; panicle loose ; flowers dioe- 

 cious. WiLld. Spec. I p. 1479. Mich. Fl. I. p. 205. 

 PurshFLl.i>'\S3. B i g. Bost. p. 72. Ejusd. Med. Bot. 

 I. p. 96. t. 10. £' //ioU iS'/:. I.p. 362. R o e m, ^ S c hxilt, 

 VI. p. 646. Dili. Elth. p. 390. t. 292. f. 377. 



A shrub or small tree. Leaves and petioles very smooth ; leaf- 

 lets about 5 pairs, oval-oblong, margined, sometimes with ob- 

 solete angular teeth ; partial petioles very short Flowers 

 greenish, in loose slender racemes, which are clustered at the 

 extremity of the branches, peduncle and fiedicels pubescent. 

 Berries subglobose, very smooth, nearly white when ripe. 



Hab. In swamps and v^et woods ; rare near New- York. June — 

 July. Stvamfi Sumach. — Foisott Elder. 



The effluvium of this plant is a violent poison to some per- 

 sons, though, as Dr. Big-elo no remarks, the majority of con- 

 stitutions are unaft'ected by it. 



* * Leaves ternate. 



5. R. Toxicodendron L. : stem erect; leaflets broad- 

 pval, entire, or sinuate-dentate, subpubescent beneath ; 

 flowers dioecious, in sessile axillary racemes. IV Hid. Spec. 

 1. p. 1 48 1 . Elliott S/c. I. p. 363. W a 1 1. Car. p. 255 . 

 R. Toxicodendron ,3. quercifoliuni Mich. Fl. I. p. 183. 

 Pu r sh Fl. \. p. 205. R o c m, S,- Schult.Yl. p. 652. 



