196 
FLORA OF ADEN. 
■| — J inch long, hard and sharp, divaricate ; pinnae 4 — 8 pairs, f — 1 inch 
long. Leaflets 10 — 20 pairs, T 3 ^ — £ by inch, sessile, rigidly coria- 
ceous, linear-oblong, acute, green, suogiabrous, base oblique, rounded. 
Mowers in globose heads, J — J inch in diameter, fragrant, deep yellow 
peduncles § — 1 inch long, crowded on axillary nodes, slender, terete, 
pubescent, with a ring of small deflexed ciliate bracts at or near the 
apex ; bracteole solitary, deltoid, on a long slender stalk, ciliolate. 
Calyx T V inch long, membranous, teeth short, triangular, acute. Corolla 
y 1 * ^ inch long ; lobes very short ; obtuse. Ovary glabrous. 
Pods 2 — 3J by \ inch, subcylindric, turgid, slightly curved, conspicu- 
ously striately veined, glabrous, brown ; mesocarp pulpy. Seeds 
biseriate. 
Locality : — Cultivated at Shaikh O’thman (Defl.). 
Distribution .-—Indigenous in America, but naturalized in India,, 
Burma and other countries. 
2 , Prosopis Linn. 
Erect prickly trees or shrubs. Leaves 2-pinnate ; stipules small or 0. 
Leaflets small, narrow. 
Flowers 5-merous, usually sessile, in narrow spikes or subsp.icate 
racemes. Calyx campanulate, shortly toothed or subentire. Petals 
connate below the middle or at length free, valvate. Stamens 10, free, 
shortly exserted ; anthers crested with a deciduous gland. Ovary sessile 
or stalked ; ovules many ; style filiform ; stigma minute, terminal. 
Pod turgid, cylindric or oblong, straight, falcate, or variously 
twisted, septate between the seeds ; mesocarp thick, spongy. Seeds 
usually ovoid, compressed. 
Species about 18. 
Distribution : — Tropical and subtropical regions of the world. 
The following species is cultivated near the tanks of Aden : 
1. Prosopis juliflora DC. Prodr. 11, 447 ; Benth. in Trans. Linn. 
Soc. vol. 30, 387. 
Prosopis glandulosa Torrey Ann. N. Y. Lyc. II, 192, t. 2. 
Algarobia glandulosa Torr. & Gray FI. I, 399 ; Gray, PI. Wright, 
I, 60. 
Prosopis odorata Torr. in Frem. Rep. 313, t. 1, excl. fruct. 
Description A shrub or tree, glabrous or puberulent, with stout 
axillary spines, or often unarmed. Leaflets 6 — 30 pairs, short-oblong to 
linear, 3 — 18 inches long, obtuse or acute. 
Spikes shortly peduncled, 2—4 inches long, usually dense, 1 — 3- 
fruited. Flowers nearly sessile, a line long. 
