ORDER XXX. AMYRIDACEiE. 2o5 



4. R. copalo'na, (L.) a branching shrub ; brand) es pi)>)esc'nt. 

 LeavcR pinnate. Lvifict^^ — 21, obliquc-ly-hmcoolate, slightly revnhit.-, 

 ghibro s on the upper surface, pubevsceut ow the lower, unequal at the 

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

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

 mou. 8—12 feet. Sumach. 



5. R. ver'nix, (L.) a slirub, with glabrous branches, poi^onoua 

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

 Flowers in slender panicles, axillary, mostly dioecit^us. Fruit sub glo- 

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

 and upper districts of Geo. and Car. 



Poison Sumach. R. veneiiata, D. C. 



6. R. toxicoden'dron, (L.) A small, slender shrub. Leaves trifoliate, 

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

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

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

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



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

 R, toxicodendron, and is made a variety of that species by Torrey & 

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

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

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

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

 Differs entirely in habit from the R. t., prefei-ring 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 

 when old, ternate. Leaflets sessile, rhomboid-ovate, iricisely toothed, 

 the terminal one narrowed at the base. Floivers 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.— AMYPJDA'CE.E. 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 — C, pendulous. Fruit drupa- 

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



Genus I.— AM'YRIS. L. 8—1. 

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



Genus same as the Order. 



1. A. Florida'na, (Nutt.) A shrub. Leaves on very short petioles, 

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

 Drupes sub-globose. — White. East Florida. 



Order XXXI.— AURANTIA'CE.E. Corr. 



Cahj.r: tubular, 4 — 5-oleft, urceolate or campanulate. Petuls 

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



