FABACEAE  

Single-stemmed or multi-stemmed shrubs or small trees. Leaves simple, flat, obovate to +/- orbicular, petiolate, densely tomentose on both surfaces, coriaceous; stipules paired. Flowers 2-4(-6), decussate, in axillary, pedunculate inflorescences; bracts sheathing pedicel, sometimes clasping calyx, densely tomentose; bracteoles 0. Calyx with base intrusive; upper 2 lobes fused higher up; lateral lobes often coherent with upper lobes or carinal lobe. Corolla yellow, longer than calyx, glabrous; standard transversely elliptic, apex emarginate, claw thick, rigid; wing petals oblong to obovate, slightly longer than keel, tips imbricate; keel petals semicircular, rostrate, auriculate, apex obtuse. Stamens diadelphous, free almost to the base; anthers slightly dimorphic, 5 + 5, alternately dorsifixed and subbasifixed. Ovary 5- or more-ovuled; style slender, slightly upcurved, densely hairy at least on lower half. Pod coriaceous, linear to obliquely-oblong, compressed to somewhat inflated, 5-8-seeded, densely sericeous to tomentose. Seeds elliptic to obovate in side view, dark green to black or orange-brown to reddish brown.

Unarmed shrubs, often with leafless branches. Leaves rare, 1-foliolate; stipules 0. Flowers showy, bright yellow, in terminal, many-flowered racemes; bracts and bracteoles minute, caducous. Calyx subspathaceously split at back; teeth 5, short, upper 2 free, lower 3 connate into a lip. Petals: vexillum large; wings obovate; keel incurved, acuminate, longer than wings, claw adnate to staminal tube. Stamens monadelphous; alternate anthers short and versatile, alternately longer and basifixed. Ovary sessile, many-ovuled; style incurved, glabrous; stigma oblong, decurrent on inside. Pod linear-oblong, glabrous, flat, dehiscent, 2-valved, subseptate between seeds inside. Seeds many, estrophiolate. x= 6, 8, 9, 13 ( polyploidy).

Erect or decumbent herbs or shrublets. Leaves pinnate; leaflets in 6-12 pairs, opposite, asymmetric at base, stipulate; stipules conspicuous, appendaged at base, with appendage 2-auricled, one ear rounded and short, the other linear and longer, persistent. Flowers in short, dense, axillary, scorpioid cymes; bracts entire, scarious, brownish, caducous, with persistent bracteoles below calyx. Calyx 2-lipped. Petals: vexillum +/- orbicular; keel petals united dorsally, free at apex. Stamens 10, alternately long and short, united into a tube for two-thirds, split above. Ovary shortly stipitate, with 2-9 ovules; style inflexed, glabrous; stigma terminal. Pod enclosed within accrescent calyx, jointed; joints indehiscent. Seeds reniform. x= 19.

Trees, shrubs, perennial or annual herbs. Leaves paripinnate; extrafloral nectaries often present on leaf stalks or raceme axes or both, verruciform, claviform or phalloid, secretory surface convex. I nflorescence a 1-many-flowered raceme, primitively axillary, often becoming corymbose-paniculate towards end of branchlets or rarely cauliflorous; bracteoles 0. Petals 5, yellow, exceptionally white, either subiso- or strongly heteromorphic, vexillar one interior in bud. Stamens 5-10, straight filaments shorter than or not over twice as long as basifixed anther, when less than 10 stamens fertile then whole set accrescent toward abaxial side of flower, adaxial ones dwindling to staminodes, perfect anthers either truncate, obliquely produced into a pollen cup, or beaked, lateral sutures glabrous, their dehiscence terminal by pore or short slit. Pod terete, 4-angulate, turgid, or plano-compressed, sometimes winged lengthwise along either sutures or valves; valves varying from papery to coriaceous or ligneous, cavity often transversely septate, seeds 1- or rarely 2-seriate, oriented either transversely or basipetally; indehiscent or tardily dehiscent along ventral suture, or through both sutures, but valves never coiling. Seeds not punctate. x= 7 (can also be 14, polyploidy).

Herbs, annual, diffuse, prostrate or spreading, pilose. Leaves digitately 3-foliolate; stipules small or foliaceous, solitary or in pairs. Flowers solitary or 1-5 in short racemes opposite leaves; bracts and bracteoles setaceous. Calyx with campanulate tube; lobes narrow, subequal, upper 2 broader and falcate. Petals: vexillum ovate or oblong; wings narrow; keel similar to wings. Stamens monadelphous, with somewhat split sheath; anthers small, uniform. Ovary sessile, many-ovuled; style straight, glabrous, with terminal stigma. Pod oblong, linear or linear-lanceolate, acute, inflated or scarsely so, when mature gaping along adaxial suture. Seeds many, on short, filiform funicle. x= 6, 7.