Subfamily: Mimosoideae.
Phylogenetic Number: 2.3.02.
Tribe: Mimoseae.
Group: Aubrevillea.
Species Studied - Species in Genus: 2 studied; 2 in genus.
Fruit: A legume; unilocular; 9–22 cm long; 2–5.5 cm wide; 0.1–0.4 cm thick; more than 9 times longer than wide; with deciduous androecial sheath; with deciduous corolla; with deciduous calyx; without orifice formed by curving of fruit or fruit segments; straight; not plicate; twisted (1–2 twists near base and occasionally medial or apical twist); asymmetrical; oblong; not inflated; flattened; without beak; short tapered at apex; aligned with longitudinal axis of fruit; short tapered at base; aligned with longitudinal axis of fruit; with the apex and base uniform in texture; chartaceous; seed chambers externally visible; margin not constricted; margin without sulcus; margin plain; wing(s) absent; stipitate; with the stipe up to 20 mm long; indehiscent. Replum invisible. Epicarp dull; multicolored; mottled; tan; with brown overlay; mottling color combination constant; with mottling over seed chambers; with surface texture uniform; glabrous; eglandular; without spines; not smooth; with elevated features; veined; reticulately veined; not tuberculate; not exfoliating; without cracks; without embedded tissue, much thicker than epicarp, running from base to apex. Mesocarp absent. Endocarp present; visible; dull; opaque; monochrome; tan; reticulate; without adhering pieces of testa; nonseptate; not exfoliating; entire. Seed(s) 1–7; length parallel with fruit length to transverse to fruit length; neither overlapping nor touching; in 1 series. Funiculus to up 20 mm long; of 1 length only; filiform; S-curved to contorted, or plicate. Aril absent.
Seed: 13–15 mm long; 12–14 mm wide; 2 mm thick; not overgrown; not angular; symmetrical; reniform; flattened; with surface smooth; without visible radicle and cotyledon lobes; without hilar sinus; without umbo on seed faces; without medial ridge on each face. Cuticle not exfoliating; not inflated; not wrinkled. Testa present; without pieces of adhering epicarp; not adhering to endocarp; free from endocarp; dull; not modified by a bloom; colored; monochrome; brown; glabrous; not smooth; with elevated features; rugose (with reticulate pattern); chartaceous. Pleurogram absent. Pseudopleurogram absent. Fracture lines absent. Rim absent. Wing(s) absent. Raphe visible; color of testa, or lighter than testa; tan. Hilum present; fully concealed; concealed by funicular remnant; without faboid split; punctiform; apical at apex of radicle tip; flush; not within corona, halo, or rim. Lens discernible (on same side of hilum as micropyle); up to 5 mm long; with margins straight; irregular; not in groove of raphe; flush; dissimilar color from testa; darker than testa; black; not within corona, halo, or rim. Endosperm absent. Cotyledons smooth; both outer faces flat; both the same thickness; both more or less of equal length; not folded; margin entire 180 degrees from base of radicle; similar at apex; completely concealing radicle; split over radicle; with the interface division terminating at base of radicle; without margins recessed; inner face flat; glabrous on inner face. Embryonic axis straight; perpendicular to length of seed; without a joint evident between the radicle and the cotyledons. Radicle differentiated from cotyledon; straight with embryonic axis; centered between cotyledons. Plumule moderately developed; glabrous.