ORDER XLIV. ROSACEA. 297 



1. D. buachylo'ba, (D. C.) Stem glabrous, unarmed. Leaves bipin 

 nate, 6 — 14 pairs of linear leaflets, numerous, with a gland at the baso 

 of each pair, or only at the lowest pair. Fiowcrs in axillary heads, 

 Zyumes crowded, by abortion often 1 — 2-seeded. — White. %. Flor- 

 ida and Southwestern States. 1 — 3 feet. 



Genus LI.— ACA'CIA. Necker. 15—10. 

 (From ac, a point, and akaso, to sharpen, many of the species having thorns.) 



Flowers polygamous. Calyx 4-toothed. Petals slightly 

 united at the base. Stamens 10, inserted into the base of the 

 corolla. Legume 1-celled, many-seeded. Plants with bipin- 

 nate leaves ; leaflets numerous. Flowers in heads or spikes. 



1. A. lute' a, (Leav.) Stem herbaceous, procumbent, unarmed, pu 

 bescent, with angular branches; stipules nearly subulate, petioles with- 

 out glands. Leaflets linear-oblong, ciliate. Flowers on axillary pedun- 

 cles, in oblong heads; calyx deeply cleft ; petals ovate-acute. Legumes 

 stipitate, compressed, about half an inch long. — YelloAV. %. Ala. and 

 Lou. 



Genus LIL— VACHEL'LIA. W. h Am. 



Calyx 5-toothed. Floivers polygamous. Petals united, 

 forming a 5 — 6-toothed corolla. Stamens numerous, distinct. 

 Legume cylindrical, turgid, filled with pulp. Seeds in a double 

 row. 



1. V. Farnesia'na, ("W. & Arn.) A small tree, with stipular spines. 

 Leaves bipinnate ; leaflets numerous. Flowers in globular heads. Pe- 

 duncles axillary. Yields gum. — Yellow. ^ . Flor. and Lou. 



The Order Leguminosse is one of the most extensive, and important. It yields to 

 medicine and the arts its full proportion of the substances derived from the vegetable 

 kingdom. In the Pea and Bean it affords two important articles of food, and in point 

 of beauty many of its productions are^carcely rivalled. Among the most important 

 articles of the Materia Medica derive* from this order are the gums Traaacanth, 

 Arabic, and Kino ; Senna, Tamarind, Catechu, from a species of Acacia; Dragon's 

 Blood, Cowhage, from the Dolichos pruriens ; and Balsam Copaiva and Tolu. To the 

 arts it affords indigo, Logwood, Rosewood, a species of Mimosa, Sandal-wood, &c. ; 

 as food for men and animals, the Pea, the Bean, Clover, Lucerne, &o. 



Order XLIV.— ROSA'CE^E. 



Sepals usually 5, more or less united, persistent. I J etals 5, 

 perigynous, occasionally absent. Stamens numerous, inserted 

 into the lining of the calyx. Ovaries solitary or several, some- 

 times united with the calyx or with each other. Seeds anatro- 

 pous. Leaves alternate, stipulate, simple, or compound. 



ANALYSIS. 



1. Calyx inferior 2 



Calyx superior 12 



2. Ovary solitary 3 



Ovaries more than 1 5 



8. Style arising from the base of the ovary Chrysobalanus, 1 



Style terminal .... 4 



13* 



