Tetrapleura. | XLVII. § MIMOSEEH (OLIVER). 331 
2. T. andongensis, Welw. mss. Tree of 15-25 ft. or more; ex- 
tremities terete, glabrous, the epiderm early splitting longitudinally. 
Leaves 6-10 in. long, wholly glabrous; pinne in 38 or 4 pairs, occa- 
sionally alternate; leaflets about 14-16 to each pinna, usually alter- 
nate, distinctly petiolulate, elliptical or ovate-elliptical, very obtuse 
entire or retuse at the apex, venation very obscure, 6—9 lines long, 4-4 
in. broad, petiolule 1 line or less. Flowers not seen. Legume 4—9 in. 
long, 1 in. broad, pointed, each valve with a narrow coriaceous longi- 
tudinal wing about }—3 in. high. 
Lower Guinea. Angola, Pungo Andongo, Dr. Welwitsch! 
3. Besides the above, Dr. Welwitsch collected in Golungo Alto specimens of the fruit 
of probably a third species of Tetrapleura (T. obtusangula, Welw. mss.) The legume 
is about 4 in. long, clavate-tetragonous, obtusely apiculate and obtusely rhomboidal in 
transverse section. It was borne by a tree of 25-30 ft., the leaves of which Dr. Wel- 
witsch was unable to collect. : 
Possibly to the same species may belong fruits in the Kew Museum, collected in 
South Central Africa by Dr. Kirk. These are nearly 6 in. in length, and less distinctly 
clavate. Shorter legumes 34-4 in. long, obtuse and apiculate, curved or straight, inter- 
mediate in transverse section between the tetragonous fruit of T. obtusangula and the 
tetrapterous fruit of 7. Thonningii, were also collected by the same naturalist on the 
Rovuma river. 
7. PROSOPIS, Linn.; Benth. et Hook. f. Gen. PI. i. 591. 
Flowers 5-merous, sessile or subsessile. Calyx 5-toothed or 5-fid. 
Petals free (or connate below), oval, valvate, at the base very shortly 
consolidated with the disk and base of the filaments. Stamens 10, free, 
exserted; anthers obovate-rotundate, with a sessile incurved or anticous 
gland between the divergent apices of the cells (in P. oblonga). Ovary 
subsessile, oblong, multiovulate ; style slender, stigma terminal, minute, 
concave. Legume in P. oblonga (§ Anonychium) usually straight, sub- 
terete, with a thick hard pericarp transversely septate between the 
albuminous seeds; in P.? Kirkii (§ Circinaria) compressed, circinate, 
with exalbuminous seeds.—Trees, armed or unarmed. Leaves bipin- 
nate, leaflets firm or subrigid. Stipules 0 or inconspicuous. Flowers 
small, in dense axillary spikes. 
Fg of the species are American. The Tropical African species are peculiar to this 
ora, 
Pinne 2~3-jugate. Legume subterete straight . . . .....- LP oblonga. 
Pinne 6-7-jugate. Legume flat circinate . . . Se oh Donk. ivi 
1. P. oblonga, Benth. in Hook. Journ. Bot. iv. 1842, 348. A hard- 
wooded tree occasionally attaining 70 ft.; extremities unarmed, sub- 
terete, striate or slightly furrowed, puberulous. Leaves bipinnate, 
5-8 in., rachis terete, puberulous; pinne 2—3-jugate with a sessile 
gland between each pair; leaflets usually 5—11-jugate, elliptic-oblong 
oval or lanceolate, subacute, usually mucronate, thinly or obsoletely 
antedee or pubescent, oblique-based, subsessile, 3—1 in. long, }—§ in. 
road. Flowers white or greenish yellow in solitary axillary shortl 
pedunculate dense spikes 14-23 in. es Calyx minute, 5-fid, with 
