340 xlvii. § mimose^ (oliver). [Acacia. 



Gnillemin and Perrottet (Fl. Seneg. 245) would refer A. Senegal, Willd., DC. Prod. ii. 

 459, to this species. Mr. Bentham leaves the identification of this plant and of A. Asak, 

 Willd. doubtful (Hook. Journ. Eot. 1842, 509), but notes that they "are evidently 

 near A. hamuiosa, Bth. (an Arabian species) and A. VereJc, G. and P., and perhaps 

 identical with the one or the other.'' 



2. A. Lahai, Steud. et Hochst. ; Benth. in Lond. Journ. Bot. 1842, 

 506. A small or medium-sized tree; extremities glabrous, with a 

 brownish or ashen bark. Stipular spines occasionally very short, 

 usually prominent, patent, straight, J— 2 in. long, flattened below on 

 the upper face. Leaves puberulous or glabrescent; rachis 1J-4 in., 

 with a small gland near the base ; pinnae in 7-13 pairs ; leaflets linear- 

 oblanceolate or linear, rather obtuse, in 12—26 pairs, 1J— 2 lines long. 

 Spikes axillary solitary or 2-3 together, 2-4 in. long*. Flowers sessile. 

 Petals free at the apex, about 4 times as long as the short deltoid-toothed 

 calyx. Legume broadly oblong, obtuse, minutely apiculate, abruptly 

 narrowed at base into a stipes of \— \ in., flat, valves coriaceous, brown, 

 shining, much reticulate, 2-2J in. long, j-lj in. broad. — A. Rich. Fl. 

 Abyss, i. 240 ; Schweinf. Acacien-arten d. Nilgebiets, 359. 



Nile Land. Abyssinia, Dillon and Petit ! Schimper! Capt.Pullen! 



3. A. mellifera, Benth. in Hook. Lond. Journ. Bot. 1842, 507. Shrub 

 or small tree, wholly glabrous, with brownish or sometimes pale and 

 glaucous extremities, unarmed excepting a pair of short recurved infra- 

 stipular prickles, usually below each node. Leaves as broad as long, 

 not exceeding 1—2 in., glaucous at least beneath- pinna? in 2 pairs ; 

 leaflets unijugate, obliquely obovate-oblong or obovate-rotundate, ob- 

 tuse entire or retuse, the larger leaflets ^-^- in. long. Spikes axillary, 

 fascicled, equalling or exceeding the leaves. Pedicels about equalling- 

 the short truncate calyx. Petals 3-5 times longer than the calyx, 

 apparently united to the middle. Legume flat, few-seeded, oblong, 

 continuous or sinuous, apiculate, narrowed at base, valves thinly coria- 

 ceous, transversely venose, pale and glabrous, 1J-2 in. long, J-f in. 

 broad. — Minima mellifera, Vahl, Symb. ii. 103, and Inga mellifera, Willd. 

 Sp. PI. iv. 1006 (fide Benth. I.e.) 



Upper Guinea. Niger, Barter ! (" Yields a gum like gum-arabic") 

 Nile Land. Abyssinia, Sclumper ! Nubia, Dr. /Schweinf urth ! Sennaar, Kotschy! 

 Eordofan and Upper White Nile, Dr. Schweinf urth ! 

 Also on the Arabian side of the Ked Sea. 



4. A. nigrescens, Oliv. Arborescent, wholly glabrous ; young 

 shoots, peduncles, and leaves more or less glaucous. Infra-stipular 

 spines geminate, very acute, short or sharply recurved, brownish-black. 

 Leaves 1 j— 2J- in. long ; rachis slender, with 1 (or 2) slightly elevated 

 gland ; pinnae 3-jugate ; leaflets 1-jugate, broadly and very obliquely 

 obovate-rotundate, entire or retuse, reticulate, drying blackish paler 

 beneath, ^-J in. long, 3-5 lines broad. Spikes axillary, solitary in our 

 specimen, a little exceeding the leaves ; flowers rather lax at least 

 below, sessile or subsessile. Calyx deeply rather acutely toothed. Petals 



