ACACIA. 



Ovary green, glabrous, shortly stipitate ; style capillary, length of the 

 stamens. Legumes flat, linear, thin, straight, glabrous, with about 6 

 seeds or fewer : seeds orbicular, flattened. — Yields Bengal Catechu, 

 according to Mr. Pereira, of bad quality. 



558. A. vera Willd. iv. 1085. DC. prodr. ii. 461. S. and C. 

 ii. t. 77. — Mimosa nilotica Linn. sp. pi. 1506. {Lob. ic. 

 ii. 95. f. 1.) — Africa from Senegal to Egypt. 



Leaves bipinnate, smooth, as well as the branches ; pinnae 2 pair ; 

 leaflets 8-10 pairs, oblong-linear; a gland between the pinnae. Spines 

 in pairs. Flowers in globose heads ; heads about 2 together, stalked, 

 axillary. Legume moniliform. — From this the best gum Arabic is said 

 to be obtained. 



559. A. arabica Willd. iv. 1084. DC. prodr. ii. 461. W. 

 and A. i. 277. — A. nilotica Delil. (sgypt. p. 31. Mimosa ara- 

 bica Lam. enc. meth. i. 19. Roxb. corom. pi. ii. t. 149.^/?. ind. 

 ii. 557. (Pluk. t. 221. f. i.) — Common all over India and Arabia. 



A small tree, with taper glabrous thorny branches. Thorns stipulary, 

 sometimes long, sometimes short or almost wanting : leaves bipinnate ; 

 pinnae about 5 pairs, with a gland between the first and last pairs ; 

 leaflets 15-20 pairs, glabrous. Peduncles aggregated, axillary or 

 forming a terminal raceme by the abortion of the leaves. Flowers in 

 globose heads. Corolla 5 cleft. Stamens numerous, distinct. Legumes 

 stalked, compressed, thickish, contracted on both sutures between the 

 seeds. — In the opinion of Ehrenberg this is a mere variety of A. vera. 

 Bark a powerful tonic. 



560. A. Seyal Delil. fl. (Egypt 142. t. 52. f. 2. 



561. A. tortilis Forsk. descr. 176. 



562. A. Ehrenbergii Hayne N. and E. pi. 

 med. t. 413. 



563. A. Senegal Willd. iv. 1077. 



564. A. brfota — Mimosa orfota Forsk. descr. 177. — Dahbi 

 in Arabia. 



Leaves twin, bipinnate ; pinnae of 4-5 pairs ; the last separated by a 

 scale. Leaflets 6-9 pairs, oval-linear, oblique at the base, half a nail 

 long. Spines 2 under each axil, in the room of stipules, very spreading, 

 as long as the leaf. Legumes not jointed, compressed, attenuated at the 

 base. — Leaves prevent fresh camel's milk from becoming acid for 

 several days. Fumigation with the wood and resin employed with 

 success by the Arabs in epilepsy. Forsk. 



565. A. leucophlaea Willd. iv. 1083. DC. prodr. ii. 462. 



W. and A. i. 277 Mimosa leucophlaea Roxb. corom. pi. ii. 



t. 150. /. ind. ii. 558. A. alba Willd. 1. c. DC. 1. c. — Coast 

 of Coromandel. 



A tree ? armed with stipulary thorns. Leaves bipinnate ; pinnae 

 7-12 pairs, with a gland below the first, and between some of the last 

 pairs; leaflets 16-30 pairs, oblong-linear, pubescent or nearly glabrous. 

 Panicles large, terminal or from the upper axils ; branches ami peduncles 

 shortly tomentose. Flowers in globose, shortly pedunculate heads. 

 Corolla 5-cleft. Stamens numerous, distinct. Legume narrow, linear, 

 269 



are other spe- 

 cies yielding a 

 gum like Gum 

 Arabic. 



