ACACIA. LEGUMINOSAE. 277 
It is remarked in the Suppl. Plant. that the same tree is furnished with 
various sizes of thorns and of leaves ; so that our two varieties may prove not 
to be essentially distinct. ae 
858. (17) A. Arabica (Willd.:) subarboreous, armed: branches terete, gla- 
brous ; thorns stipulary, sometimes long, sometimes short or almost wanting : 
leaves bipinnated ; pinne about 5 pair, with “a gland between the first and 
last pairs; leaflets 15-20 pair, glabrous: peduncles aggregated, axillary or 
forming a termifial raceme by the abortion of the leaves: heads of flowers 
globose : corolla 5-cleft: stamens numerous, distinct: legumes stalked, com- 
pressed, thickish, contracted on both sutures between the seeds.— Willd. sp. 
4. p. 1085; DC. prod. 2. p. 461; Spr. syst. 3. p. 145; Wall.! L. n. 5246 ; 
Wight ! cat. n. 516, 590.—Mimosa Arabica, Lam. enc. meth. 1. p. 19; Rowb. 
Cor. 2.t. 149 ; fl. Ind. 2. p. 557.—Pluk. t. 221. f. 1. ; 
There are unarmed specimens of this in the Linnæan herbarium. 
£259. (18) A. leucophiea (Willd. :) arboreous ?, armed with stipulary thorns : 
leaves bipinnated ; pinnæ 7-12 pair, with a gland below the first, and be- 
tween some of the last pairs ; leaflets 16-30 pair, oblong-linear, pubescent or 
nearly glabrous: panicles large, terminal or from the upper axils ; branches 
and peduncles shortly tomentose: heads of flowers globose, shortly pedun- 
cled: corolla 5-cleft: stamens numerous, distinct: legume narrow, linear, 
long, curved, shortly tomentose (at least when young).— Willd. sp. 4. p. 1083; 
DC. prod. 2. p. 462; Spr. syst. 3. p. 155; Wall.! L. n. 5261; Wight! cat. n. 
579, 580, 581, 582, 583, 584.—A. alba, Willd.; DC. l. c.—Mimosa leuco- 
phlea, Roxb. Cor. 2. t. 150 ; fl. Ind. 2. p. 558.—M. alba, Rottl. in nov. act. 
nat. cur. Berol. 1803, p. 208. : > 
There is but one species, so far as we know, in India, with a panicled glo- 
bular inflorescence and stipulary thorns. 
§ 4. Armed with scattered prickles : heads of flowers globose. 
860. (19) A. pennata (Willd. :) diffuse, climbing : branches irregularly an- 
gled, slightly tomentose, armed with numerous small scattered nearly straight 
or recurved prickles : leaves bipinnated ;pinnæ 8-13 pair ; leaflets numerous, 
small, narrow-linear, semihastate, acute, glabrous : petiole tomentose, armed 
with a row of prickles on the under side, with a large flat gland near the 
base, and a small one between each of the 2-3 extreme pairs of pinnæ : pe- 
duneles gated, axillary, or forming naked racemes towards the ends of 
the branches: flowers in globular heads, polyandrous: legumes thin, 6-10- 
seeded.— Willd. sp. 4. p. 1090 (char. bad) ; DC. ? prod. 2. p. 464 ; Spr.? syst. 
2. p. 147; Wight! cat. n. 588.—A. cesia, Wall.! L. n. §253.—A. canescens, 
Grah.! in Wall.! L. n. 5256.—A. megaladena, Desv. Journ. bot. 1814. 1. 
p. 69; DC. L c. p. 465.—Mimosa, n. 216, Linn. ! in herb. Herm.! ; ft. Zeyl. 
—M. pennata, Linn. sp. p. 1507 (excl. syn.)—M. torta, Roxb. l. c. p. 566.— 
. ferruginea, Rottl. ! ;Spr. syst. 2. p. 207 ; DC. l c. 481.——Courtallum. 
861. (20) A. concinna (DC.:) diffuse: branches irre arly angled and 
armed with numerous scattered compressed recurved prickles: leaves bipin- 
nated; pinns; 6-8 pair; leaflets 15-25 pair, linear, somewhat semihastate, 
Obtuse, mueronate, glabrous: petioles armed with hooked prickles on the 
under side, with a large gland near the base and another between the extreme 
a stipules large, membranous-cordate: panicles terminal and axillary, 
; branches tomentose ; heads of flowers globular, peduncled, 3-5 toge- 
ther in the axils of a small leaf or deciduous bractea : corolla 5-cleft: stamens 
numerous, distinct : legumes large, succulent, contracted between the seeds ; 
valves when dry shrivelled and rugose on the surface, angled on the margin. 
— DC. prod. 2. p. 464; Wall.! L. n. 5250; Wight! cat. n. 566, 586, 589.— 
A. pennata, DC. ? J. c.—Mimosa concinna, Willd. sp. 4. P. 1039 ; Roxb. fi. 
Ind. 2. p. 564.—M. rugata, Lam. enc. meth. 1. p. 20; DC. l c. p. 431; Spr. 
d 
