Subfamily: Mimosoideae.
Phylogenetic Number: 2.3.01.
Tribe: Mimoseae.
Group: Dinizia.
Species Studied - Species in Genus: 1 studied; 1 in genus.
Fruit: A legume; unilocular; 15–35 cm long; 5–7 cm wide; 0.1–0.5 cm thick; 2–9 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 to curved; not plicate; not twisted; symmetrical; broadly oblong; not inflated; flattened; without beak; short tapered at apex; aligned with longitudinal axis of fruit; tapered at base to rounded at base; aligned with longitudinal axis of fruit; with the apex and base uniform in texture; coriaceous; seed chambers externally faintly visible; margin not constricted; margin without sulcus; margin plain; wing(s) absent; stipitate; with the stipe up to 25 mm long; indehiscent. Replum invisible. Epicarp glossy; monochrome; brown (to blackish brown); with surface texture uniform; glabrous; eglandular; without spines; not smooth; with elevated features; faintly veined; reticulately veined; not tuberculate; prominent longitudinally wrinkled (paralleling both margins); 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; smooth; without adhering pieces of testa; nonseptate (though seed chambers fringed by spongy tissue); not exfoliating; entire. Seed(s) 5–10; length transverse to fruit length; neither overlapping nor touching; in 1 series. Funiculus to 13 mm long; of 1 length only; filiform; S-curved. Aril absent.
Seed: 10–13 mm long; 6–7 mm wide; 1.5 mm thick; not overgrown; not angular; symmetrical; oblong; compressed; 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; glossy; not modified by a bloom; colored; monochrome; black; glabrous; not smooth; with recessed features; faintly, parallel striate (testa splitting along striations during imbibition); chartaceous. Pleurogram absent. Pseudopleurogram absent. Fracture lines absent. Rim absent. Wing(s) absent. Raphe not visible. Hilum present; visible, or fully concealed; concealed by funicular remnant; without faboid split; punctiform; apical at apex of radicle tip; recessed; not within corona, halo, or rim. Lens not discernible. Endosperm present; thick; not pluglike and not resembling tip of radicle; covering entire embryo; adnate to embryo (masking true position of radicle). Cotyledons smooth; both outer faces convex; both the same thickness; both more or less of equal length; not folded; margin entire 180 degrees from base of radicle; similar at apex; partially concealing radicle; with lobes; with lobes not touching; with the interface division terminating at base of radicle; without margins recessed; inner face flat; glabrous on inner face. Embryonic axis straight; parallel 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 rudimentary; glabrous.