Acacia.] xlvii. § mimose^ (oliver). 351 



the lowest and one or two of the upper or all the pairs, rachis pubes- 

 cent; leaflets in 10-15 pairs, linear, subacute. Inflorescence and 

 bracts as in A. arabica. Calyx shortly and obtusely toothed. Petals 

 connate f of their length, scarcely twice as long- as the calyx. Leg-urn e 

 linear, compressed, more or less distinctly moniliform, glabrous, each 

 article with a prominent central tubercle. 



South Central. Highlands of Batoka country, Dr. Kirk! 



31. A. Seyal, Delile, Fl. d'Egypte, 142, t, lii. 2. A small or medium- 

 sized tree ; extremities g-labrous or obsoletely puberulous ; bark brown 

 or reddish-brown (milk-white in var. t ftstula). Stipular spines patent, 

 1-2 in. long, rather slender, at length ivory-white, toward the ex- 

 tremity of flowering branches frequently very short, recurved. Leaves 

 glabrous ; pinme in 3-9 pairs ; rachis usually with at least one gland ; 

 leaflets linear-oblong obtuse, in 8-20 pairs, 1J-2J lines long. Pe- 

 duncles 1-5 from each node, occasionally shortly panicled or racemose, 

 f-lj in. long, glabrous, bearing the deciduous involucel below the 

 middle. Flowers capitate. Calyx-teeth short, obtuse. Petals united 

 | their length or more, twice as long as the calyx. Legume linear, 

 falcate, slightly but distinctly broadly constricted between the longi- 

 tudinally disposed seeds, narrowed at each end; valves coriaceous, 

 longitudinally areolate-nervose, 3-6 in. long, \-\ in. broad. — A. Gi- 

 rajf'ce, Sieb. Herb. Seneg. 



Upper Guinea. Senegambia, Sieber ! Lelieur ! 



North Central. Forming woods of enormous extent between the 12th and 16th 

 parallels, and occurring in isolated examples in dry stony places (not in sand) from the 

 Black Mountains (29° N. lat.) to Kouka, E. Vogel ! 



Nile Land. Abyssinia, Schweinfurth ! Upper Nile, 9°N. lat. (767.7), Speke and 

 Grant! Nuuia, Dr. Schweinfurth! 



Mozamb. Distr. Manganya hills, Zambesi land, Dr. Meller! 



Var. fistula (A. fistula, Schweinf. in Acacien-arten d. Nilgebiets, 344, t. 11-13). 

 Branches with a smooth milk-white bark. Leaflets often ^ in. long. Legumes as in 

 the type, |-g in. broad. 



Nile Land. Matamma, Dr. Schweinfurth! who also cites it as occurring in 

 Sennaar, and forming woods in Southern Nubia. The stipular spines are very subject 

 to a monstrous dilatation at the base, owing to insect-puncture. I should scarcely have 

 reduced this plant to A. Seyal, were it not that we possess a specimen connecting the 

 forms in the collection of Speke and Grant. 



32. A. stenocarpa, Hochst. ; A. Rich. Fl. Abyss, i. 238. Tree ; ex- 

 tremities brownish or red-brown, glabrous or minutely puberulous. 

 Stipular spines usually very short, straight or obsolete. Leaves glabrous 

 or glabrescent, rachis with at least a conspicuous sessile gland near the 

 base ; pinnte in 4—10 pairs ; leaflets linear-oblong, somewhat pointed, 

 1-2 J lines long, in 10-20 pairs. Peduncles \-\ in. long, 1-5 from 

 each axil, or in short terminal or axillary leafless racemes, glabrous or 

 puberulous, with a conspicuous early separating involucel near the base 

 or towards the middle. Flowers capitate. Calyx obtusely dentate. 

 Petals connate nearly throughout. Legume narrow-linear, flat, falcate 

 or curved nearly to a circle, scarcely or not at all constricted between 



