Acacia. | XLVII. § MIMOSEH (OLIVER). 343 
Nile Land. Abyssinia, Schimper! Southern Nubia, Schweinfurth. Hor Tama- 
nib, Red Sea, J. K. Lord! : 
Nearly allied to A. Verek, from which the different proportion in length of spike and 
leaf, and the narrower fruit distinguish it. 
10, A. purpurea, Bolle in Peters’ Mossamb. Bot. i. 6. A small tree 
with green-grey tomentose or thickly pubescent extremities. Leaf- 
rachis clothed with yellowish pubescence, bearing concave sessile 
glands between the pinnwe, which are in 8 pairs; leaflets 12-jugate, 
very shortly petiolulate, oblong, obtuse, thinly pilose, 3 lines long, 14 
lines broad. Spikes equalling the leaves, dense, pilose. Flowers 
purple. Calyx hairy with finely pointed teeth. Petals free nearly to 
the base. Legume not seen. 
Mozamb. Distr. Zambesi, Dr. Peters. : 
Ido not know this plant, nor have I identified it amongst Dr. Kirk’s collections. 
Dr. Bolle puts it in Mr. Bentham’s section Vulgares—Diacanthe. 
ll. A. erubescens, Welw. mss. A small much-branched tree ; ex- 
tremities obsoletely pubescent, pale cinnamon-brown. Infra-stipular 
prickles short, sharply recurved. Leaf-rachis 1-1} in., slender, thinly 
pubescent, with a sessile small gland below the lowest pinne ; pinne 
in 4-5 pairs, leaflets 10-14-jugate, linear-oblong, obliquely broadly 
pointed, glabrous, drying pale green, 2-3 lines long. Spikes axillary 
on leatless branches, about 14 in. long with the short peduncle, rather 
dense. Flowers rose-white (grey-yellow when dry), sessile. Calyx 
cupuliform, 5-fid, with ovate- or oblong-lanceolate teeth, clothed with 
short dense grey tomentum. Petals united two-thirds their length, 
rather longer than the calyx and similarly pubescent externally. Ovary 
very shortly stipitate. Legume not seen. 
Lower Guinea. Bumbo, Angola, Dr. Welwitsch!” 
Affords abundantly the best gum collected in this region (Dr. W.). 
12. A. ataxacantha, DC.; Benth. in Hook. Journ, Bot, 1842, 511. 
Shrub with long slender branches, puberulous or pubescent at first, 
at length often glabrate. Prickles scattered, short, decurved, some- 
times wanting. Leat-rachis 3~6 in. long, with a raised or ger ar 
gland near the base; pinne in 7—15 pairs, leaflets linear, subfalcate, 
pointed or obtuse, 2 lines long more or less, in 20-40 pairs ; stipules 
membranous, ovate-lanceolate, 4-cordate at base, deciduous. Spikes 
axillary, solitary or geminate, 2-3 in. long; flowers rather dense, sub- 
sessile, white. “Calyx shortly toothed. Petals united nearly through- 
out, twice as long as the calyx. ‘ Legume 2-valved, broadly linear, 
flat, chartaceous, glabrous.”—Guill. et Perr. Fl. Seneg. i. 244. 
Upper Guinea. Senegambia, Heudelot! Quorra, T. Vogel! Confluence of 
Quorra and Tschada, Barter ! 
13. A. macrostachya, Jieichend.; Benth. in Lond, Journ. oe 
1842, 511. Extremities rusty tomentose-pubescent, with scattere: 
occasionally infra-stipular short recurved prickles. Leaf-rachis a 
larly pubescent with a conspicuous oblong sessile gland near the base, 
