220 LEGUMINOSjE. 



220. S. brachycarpa, Benth. ! Sufrrutescent ; stem angular, virgate, pilose ; pinnae 

 8(-4)-jugal : leaflets 15-30-jugal, linear, glabrescent; peduncles as long as the globose 

 flower-heads, superior racemose ; legume short, acuminate -. prickles marginal. — Leaflets 

 1"'— 1§'" long: peduncles distant, 4'" long ; immature legume 5 '"-6"' long. — Hab. Trini- 

 dad !, Cr., at S. Anns ; [Mexico to Brazil !]. 



84. LEUC&NA, Benth. {exclus. spec.) 



Calyx 5-dentate. Stamens 10 : anthers ovoid-oblong, eglandular. Legume broadly linear, 

 stipitate, flat-compressed, chartaceous, bivalved : seeds compressed, transverse to the valves. 

 — Woody plants ; leaves bipinnate, with petiolar glands ; flower-heads globose, white, 



221. I*, glauca, Benth.! Unarmed; branches and petioles powdery-puberulous ; 

 pinnse 4-8-jugal : leaflets 10-i0-jugal, oblong-linear, pointed, oblique at the base, glabres- 

 cent, glaucous beneath ; peduncles often fascicled ; calyx half as long as the distinct petals ; 

 anthers oblong, glabrous. — Catesb. Carol. 2. t. 42 sup. — Mimosa, L. Acacia, W. A. 

 leucocephala, Li.— A tree ; leaflets 3"'-4'" long ; legume 5"-6" long, 8"'-10"' broad.— Hab. 

 Bahamas!, Swains.; Jamaica!, Al., March; Antigua!, Wullschl., Dominica!, Imr., S. 

 Vincent !, Guild.; [Mexico ! to Brazil ! ; trop. Africa ! and Asia !]. 



85. ACACIA, W. 



Corolla §— 4(-3-6)-cleft. Stamens ao-10: anthers eglandular, globose : pollen compound. 

 Legume devoid of a thickened margin, compressed, rarely cylindrical. — Leaves bipinnate in 

 the West Indian species ; flowers in peduncled heads or spikes, racemes, or clustered, 

 usually yellow. 



Bentham has excluded from Acacia the monadelphous and the decandrous species. 

 Monadelphy however in this genus is often an obscure character, and gradually increased 

 in nearly related species, while decandrous species exist still among Bentham's Acacia and 

 Calliandree (e.g. A. tamarindifolia,~W ., C. mollissima, Benth., etc.), the separation of which 

 would lead to establishing several new and artificial genera. It appears that, in Mimosa, 

 from the structure of the legume, more natural genera may be formed than from the flower, 

 and if this principle cannot be followed up, as long as the fruit in many instances is unknown, 

 it was possible to adopt it here, the legume of most of the West Indian species having been 

 examined. 



Sect. 1. Euacacia. — Legume dry, bivalved, compressed. — Stipules not spinescent. 

 § 1. Flowers spicate ; stamens oo, subdistincl. — Petioles glanduliferous. 



222.* A. Catechu, W. Branchlets and petioles whitish-pubescent ; pinna 10-30- 

 jugal : leaflets 30-50-jugal, linear, bluntish, ciliate, glabrescent : petiolar gland solitary, 

 scutellate, in the middle between the node and the lowest pinna? ; spikes elongated, axillary, 

 exceeded by the leaves ; legume stipitate, broadly linear, flat-compressed, glabrous : valves 

 slightly reticulated with veins. — Roxb. Corom. 2. 1. 175. — Mimosa, L. — A tree, unarmed 

 or with infrastipular prickles j leaflets 2'" long ; flowers whitish (but yellow in Roxburgh's 

 figure) ; legume 5"-6" long, 6"'-8'" broad : stalk 4"'-6"' long.— Hab. Naturalized in 

 Jamaica !, March, common ; Antigua !, Wullschl. ; [introduced from the East Indies !]. 



A. scleroxyla, Tuss. (Fl. 1. t. 21 ; Desc. Fl. 2. t. 93), a Haiti species, is very similar, 

 but from its figures differs by a sessile legume, and the petiolar gland immediately below 

 the lowest pinnae -. it has whitish flowers. 



223. A. xradiflora, W. Unarmed ; branchlets and petioles puberulous or glabrescent ; 

 pinna 4s-G-jugal : leaflets 10-lQjugal, oblong, unequal-sided, rounded at the top, shining 

 above, glabrescent beneath : petiolar glands between all the pinnae, scutellate ; spikes elongated, 

 peduncled, pubescent ; legume shortly stipitate, oblong-linear, flat-compressed, glabrous : 

 valves coriaceous. — Plum. Ed. Burm. 1. 11. — A. muricata, W. Mimosa, L. M. nigricans, 

 V. A. Rohriana, DC— A. tree; leaflets 5 "'-8'" long, 2"'-3'" broad; legume 4" long, 8'" 

 broad: stalk 3'" long.— Hab. Antigua!, Wullschl.; [Haiti!, S. Thomas!]. 



