Acacia.] xlvii. § mimose^; (oliver). 347 



denticulate, glabrous. Petals united nearly throughout, twice as long 

 as calyx. Legume turgid, cylindrical, or subfusiform, straight or 

 curved, finely obliquely striate, glabrous, indehiscent or tardily open- 

 ing, 2-3 in. long. Seeds crowded, irregularly biseriate. 



Probably of American origin, and frequently cultivated throughout the Tropics for 

 the sake of the perfume afforded by its flowers, but not indigenous in Tropical Africa 

 unless in Angola (Loanda and Golungo Alto), where Dr. Welwitsch describes it as at 

 least subspontaneous. 



21. A. Sieberiana, DC. Prod. ii. 463. A tree varying from 20-30 

 ft. to more than twice the height; extremities at first villous-pubes- 

 cent or pubescent, often early glabrate or obsoletely puberulous. Sti- 

 pular spines straight, usually short on flowering shoots. Pinnae in 

 10-30 pairs ; rachis pubescent or glabrate with a sessile, rather large, 

 disciform gland near the base, and additional glands between the upper 

 pinnae ; leaflets linear-oblong, usually obtuse, in 20-40 pairs, glabrous, 

 or more or less pilose ; 1-2 lines long. Peduncles slender, thinly 

 pubescent or pilose, 1-2 in. long, solitary from the lower axils or fas- 

 cicled above ; involucel at the apex or varying to nearly the middle of 

 the peduncle. Flowers capitate ; calyx shortly toothed, pubescent 

 above. Legume 2-valved, straight or slightly curved, compressed, acu- 

 minate, much narrowed at the base, margins parallel, 6-7 in. long, 

 | in. more or less broad, seeds 13—15, uniseriate, embedded in pulp ; 

 valves coriaceous, dark-brown, smooth, glabrous, at length when 

 mature Assuring transversely (fruit described from Dr. Welwitsch's 

 specimens). — Benth. in Hook. Journ. Bot. 1842, 498 ; A. Sing y Guill. 

 et Perr. Fl. Seneg. i. 251. 



Upper Guinea. Senegambia, Sieber ! Dollivger ! 



North Central. Common 60 miles South of Kouka, E. Vogel! (A tree attaining 

 80 ft., nearly wholly glabrous, rigid with fewer pinnae and longer spines than in the 

 ordinary state. Calyx glabrous or nearly so. This plant may prove distinct when 

 fruit is found). 



Nile Land. Madi (680.5), Spehe and Grant ! (leafy specimen only). 



Upper Guinea. Ambriz, Pungo Andongo and Cazengo, Angola, Dr. Welwitsch! 



22. A. abyssinica, Hochst. ; Benth. in Hook. Journ. Bot. 1846, 97. 

 Tree ; extremities softly pubescent or at length nearly glabrous. Sti- 

 pular spines very short ; occasionally stipules scarcely spinose. Pinnae 

 in 6—30 pairs from a pubescent or glabrous rachis with or without a 

 gland near the base and one or two between the upper pinna? ; leaflets 

 in 20-40 pairs, linear, obtuse or subacute, 1 J lines long. Peduncles 

 3-5 from each axil, Jin. long more or less, pubescent, involucellate 

 near the base. Flowers capitate. Calyx-teeth pilose. Petals united 

 nearly throughout, 2-3 times longer than the calyx. Legume com- 

 pressed, linear-oblong, straight or subfalcate, shortly and broadly 

 pointed or obtuse, at length 2-valved, valves continuous, slightly con- 

 vex when mature, coriaceous, longitudinally often obsoletely areolate- 

 venose ; 3-5 in. long, §- j in. broad. — A. ariphocarpa, Hochst. in Hb. 

 Schimp. Abyss. No. 522 j Benth. I.e. 96. Liga Nefasia, Hochst. in Hb. 

 Schimp. Abyss. No. 940. 



