Subfamily: Caesalpinioideae.
Phylogenetic Number: 1.4.05.
Tribe: Detarieae.
Group: Cynometra.
Species Studied - Species in Genus: 9 studied; 20–25 in genus.
Fruit: A legume; unilocular; 3–8 cm long; 2.5–5.5 cm wide; 1.5–4 cm thick; length less than twice as long as width; with deciduous androecial sheath; with deciduous corolla; with deciduous calyx; without orifice formed by curving of fruit or fruit segments; straight to curved (nearly); not plicate; not twisted; symmetrical, or asymmetrical; oblong; with 1 straight and 1 curved suture; widest near middle or D-shaped; not inflated; compressed to terete; without beak; tapered at apex; oblique with longitudinal axis of fruit to right-angled with longitudinal axis of fruit; rounded at base; oblique with longitudinal axis of fruit; with the apex and base uniform in texture; ligneous; seed chambers externally invisible; margin not constricted, or constricted (near apex); margin without sulcus; margin plain; wing(s) absent; substipitate to nonstipitate; indehiscent. Replum invisible. Epicarp dull; monochrome; dirth tannish to reddish brown; with surface texture uniform; glabrous; eglandular; without spines; not smooth; with elevated features; not veined; not tuberculate; scurfy; exfoliating in part; without cracks; without embedded tissue, much thicker than epicarp, running from base to apex. Mesocarp present; surface not veined; 1-layered; without balsamic vesicles; without fibers; without reniform canals; solid (or nearly so); ligneous. Endocarp present; visible; dull; opaque; monochrome; reddish brown; without adhering pieces of testa; nonseptate; not exfoliating; remaining fused to mesocarp and epicarp; entire. Seed(s) 1–2; length parallel with fruit length to transverse to fruit length; neither overlapping nor touching; in 1 series. Funiculus 0.1–1.5 mm long; of 1 length only; thick; straight. Aril absent.
Seed: 22–45 mm long; 15–30 mm wide; 8–15 mm thick; not overgrown; not angular; asymmetrical; D-shaped; 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; dull; not modified by a bloom; colored; monochrome; reddish brown, or black; glabrous; not smooth; with elevated features, or recessed features; rugose (because of cotyledon); shallowly pitted with small separate pits; coriaceous. Pleurogram absent. Pseudopleurogram absent. Fracture lines absent. Rim absent. Wing(s) absent. Raphe not visible. Hilum present; visible; without faboid split; larger than punctiform; 0.1–0.7 mm long; with curved outline; circular; apical according to radicle tip but marginal according to seed length; flush; not within corona, halo, or rim. Lens not discernible. Endosperm absent. 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; completely concealing radicle, or partially concealing radicle (almost completely); with lobes; with lobes touching (auriculate) and not touching; without basal groin formed by lobes; with the interface division terminating at base of radicle; without margins recessed; inner face flat; glabrous on inner face. Embryonic axis straight (or nearly so); perpendicular to length of seed; without a joint evident between the radicle and the cotyledons. Radicle differentiated from cotyledon; centered between cotyledons. Plumule rudimentary (occasionally encircled by ring of reddish brown hairs); glabrous.