ORDER XXX. AMYRIDACE^. 255 



4. R. copalli'xa, (L.) A branching shrub ; branches pubescent. 

 Leaves pinnate. Leaflets 9 — 21, obliquely-lanceolate, slightly revolute, 

 glabrous on the upper surface, pubescent on the lower, unequal at the 

 base. Petiole winged and jointed. Flowers in terminal panicles, some- 

 what leafy. Fruit red, hairy, sour. — Dull yellow. ^ . Aug. Com- 

 mon. 3 — 12 feet. Sumach. 



5. R. ver'xix, (L.) A shrub, with glabrous branches, poisonous. 

 Leaflets 7 — 13, membranaceous, oval, acuminate, entire, glabrous. 

 Flowers in slender panicles, axillary, mostly dioecious. Fruit sub-glo- 

 bose, smooth, greenish- white. — Greenish. ^ . May — June. Middle 

 and upper districts of Geo. and Car. 



Poison Sumach. R. venenuto, D. C. 



6. R. toxicodendron, (L.) A small, slender shrub. Leaves trifoliate, 

 somewhat pubescent ; leaflets broad-oval or rhomboidal, acuminate, the 

 lateral ones nearly sessile, unequilateral. Flowers in axillary racemes. 

 Fruit sub-globose, white, poison. — White. ^ . April — May. Com- 

 mon in dry pine woods. 2 — 6 feet. Poison Oak. Poison Vine. 



7. R. rad'icaxs, (L.) This plant agrees in many respects with the 

 R. toxicodendron, and is made a variety of that species by Torrey <fe 

 Gray. A large vine, climbing the highest trees, giving out radicles all 

 along the stem, which enter the bark of the tree, and afford support to 

 the vine ; small glabrous branches numerous. Leaves ternate, ovate, 

 lanceolate, acute or acuminate, generally entire, lower ones rhomboidal. 

 Differs entirely in habit from the R. t, preferring damp places. Fruit 

 white. — Yellow. ^ . May. Common. 40 — 60 ft. long. Poison Ivy. 



8. R. aromat'ica, (Ait.) A small aromatic shrub ; the young branch- 

 es tomentose. Leaves pubescent when young, glabrous and coriaceous 

 whtu old, ternate. Leaflets sessile, rhomboid-ovate, incisely toothed, 

 the terminal one narrowed at the base. Flowers dioecious, in axillary 

 compact panicles, amentaceous. Fruit nearly spherical, light red, his- 

 pid, acid. — Yellow. \ . May — June. Upper districts of Car. and 

 Geo. 2—3 feet. 



Order XXX.— AMYRIDA'CEJE. R. Br. 



Flowers perfect, regular. Sepals 4, small, persistent. Petals 

 4. Stamens hypogynous, 8. Ovary solitary, simple, 1-celled, 

 on a thickened disk ; ovaries 2 — 6, pendulous. Fruit drupa- 

 ceous, 1 -seeded. Seeds anatropous, without albumen. 



Gexus I.— AMY'RTS. L. 8—1. 

 (From the Greek a, and muron, bairn.) 



Genus same as the Order. 



1. A. Florida'xa, (Xutt.) A shrub. Leaves on very short petioles, 

 3-foliate ; leaflets ovate, strongly veined. Flowers somewhat panicled. 

 Drupe* sub-globose. — White. East Florida. 



Order XXXI.— AURAXTIA'CE^. Corr. 



Calyx tubular, 4 — 5-cleft, urceolate or campanulate. Petals 

 4 — 5, broad at the base, inserted on an hypogynous disk. Sta- 



