272 NATURAL HISTORY OF PLANTS. 
Calyx sometimes subhypogynous, gamosepalous oblique; teeth or 
lobes nearly equal, or oftener posterior shorter. Petals sessile or 
shortly unguiculate; standard ovate or orbicular; wings oblong, 
slightly adhering to keel or androceum ; keel erect, obtuse or acumi- 
nate, gibbous (Jndigastrum’) or furnished with a more or less projecting 
spur on both sides. Stamens 10, 2-adelphous; 9 connate into a thin 
sheath cleft above and long persisting; vexillary stamen free; an- 
thers uniform, glabrous or pilose, surmounted by gland-like promi- 
nent connective. Germen sessile or very shortly stipitate, 1, 2 or 
oftener -ovulate ; style glabrous ; stigma capitate, often penicillate. 
Legume either terete, 4-gamous, or sub-compressed, septate between 
seeds, 2—c-seeded (Huindigofera’); or plano-compressed, straight, 
arched, or circinate with thin margins, 2—o-seeded (Brissonia*) are 
more rarely 1-seeded ; or short globose unarmed (Spheridiophora’) ; 
or short faleate subtriquetrous, with dilated echinate dorsal suture 
(Acanthonotus’). Seeds globose, square, or cylindrical, truncate at 
both ends, exarillate; embryo exalbuminous ; radicle cylindrical or 
clubbed.—Shrubs, undershrubs, or herbs, more or less covered with 
hairs; hairs sometimes simple, sometimes attached by middle (plz 
medifixi), forked appressed ; leaves imparipinnate, or more rarely digi- 
tate 3-foliolate or simple; leaflets entire, stipellate or exstipellate ; 
flowers’ in axillary racemes or spikes, sessile or’ oftener pedicellate, 
each solitary at axil of a bract; bracts caducous’ (AU hotter regions’). 
Fruct., ii., 317, t. 148.—Lamx., Dict., iii. 244; 
Suppl. iii. 145; Zvi. t. 626.—DC., Prodr., ii. 
221.—ENDL., Gen., n. 6530.—B. H., Gen., 
494, n. 91 (including : Acanthonotus BENTH., 
Amecarpus BENTH., Brissonia Desvx., Eile- 
manthus Hocust., Hemispadon ENDL., Indi- 
gastrum Jaus. & Spacu, Oustropis Don (G.), 
Spheridiophora DESvx.). 
1 Jaus. & Spacu, Jil. Pl. Orient., v. 101, 
t. 492, 493. 
2? Bentu., Gen., loc. cit., sect. 3.—Oustropis 
Don (G.), Gen. Syst., ii. 214 (Indigofera gra- 
cilis SPRENG. ;—Lotus Bot. Mag., t. 2808 ;— 
Eilemanthus Hocust., in Flora [1846], 593). 
3 Desvx., in Ann. Sc. Nat., sér. 1, ix. 409.— 
Amecarpus BENTH., in Lindl. Veg, Kingd., 554, 
4 Desvx., Journ. Bot., i. 125, t. 6.—Jaus. 
& SPacu, op. cit., t. 494, 
5 Bentu., Niger, 293. 
6 Pink, purple, yellowish, or white. 
7 This genus is divided by Bent am (loc. cit.) 
into 4 sections: w. germen 1l-ovulate: 1. Acan- 
thonotus, legume falcate, echinate dorsally; 2. 
Sphaeridiophora, legume globose unarmed: 8, 
germen 2-0 -ovulate; 3. Huindigofera, legume 
terete 4-gonous or subcompressed; 4. Ame- 
carpus, legume compressed, straight arched or 
circinate ; sutures tapering. 
8 Jacg., Hort. Schenb., 230-236, 365; Icon. 
Rar., t. 569-571.—H. B. K., Nov. Gen. et Spec., 
vi. 455, t. 580.—VeEnt., Ch. de Plant., t. 30, 44; 
Jard, Mailm., t. 44, 55.— WALL, Pl. Asiat. 
Rar., t. 279.—Enpu., Atakta, i, t. 3 (Hemi- 
spadon). — Wieut, Toon, t. 314, 315, 330-333, 
365-369, 385-387, 403, 404, 983.— Hoor., 
Icon., t. 188.—Jaus. & Spacu, Ill. Pl. Orient., 
t. 481—494,—Gurxt. & Prrr., FU. Seneg. Tent., 
i. 172, t. 46-48.—BentH., in Mart. Fl. Bras., 
ie 35, t. 5,6; Fl. Austral., ii. 194.—Tuw., 
Enum, Pl. Zeyl., 83,— Harv. & Sonp., Fil. Cap., 
ii. 163.—Baxer, in Oliv. Fl. Trop. Afr. ii. 65.— 
Bot. Reg., t. 300, 386, 789, 957, 991, 1744; 
(1842) t. 57; (1848) t. 14; (1846) t. 22.— Bot. 
Mag,, t. 198, 465, 476, 742, 3000, 3065, 3348, 
5063.—Watp., Rep., i. 660; ii, 856; v. 514; 
Ann., i. 280; ii. 362; iv. 486. 
