Subfamily: Caesalpinioideae.
Phylogenetic Number: 1.4.14.
Tribe: Detarieae.
Group: Hymenostegia.
Species Studied - Species in Genus: 2 studied; 3 in genus.
Fruit: A legume; unilocular; 10 cm long; 4 cm wide; ?; 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; not plicate; not twisted; symmetrical, or asymmetrical; with nearly straight 1 straight and 1 curved suture; widest near middle or D-shaped (stated as "scimitar shaped"); not inflated; flattened; without beak; long tapered at apex; aligned with longitudinal axis of fruit; tapered at base; aligned with longitudinal axis of fruit; with the apex and base uniform in texture; ligneous; seed chambers externally invisible; margin not constricted; margin without sulcus; margin plain; wing(s) absent; substipitate; with all layers dehiscing; splitting along suture(s). Dehiscence of valves along both sutures; active; with valves separately enrolling. Replum invisible. Epicarp dull; monochrome; brown; with surface texture uniform; glabrous; eglandular; without spines; not smooth; with elevated features; faintly veined; reticulately veined; not tuberculate; lenticular; exfoliating in part; without cracks; without embedded tissue, much thicker than epicarp, running from base to apex. Mesocarp present; surface not veined; 1-layered, or 2-layered; without balsamic vesicles; with fibers; without reniform canals; solid; with fibers embedded in mealy tissue over solid layer; ligneous. Endocarp present; visible; dull; opaque; monochrome; brown; without adhering pieces of testa; nonseptate; not exfoliating; remaining fused to mesocarp and epicarp; entire. Seed(s) 1–2; length transverse to fruit length; neither overlapping nor touching; in 1 series. Funiculus of 1 length only. Aril absent.
Seed: 23–30 mm long; 14–20 mm wide; 4–6 mm thick; not overgrown; not angular; symmetrical, or asymmetrical; oblong to D-shaped; 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; blackish brown; glabrous; not smooth; with elevated features; minutely rugose; coriaceous. Pleurogram absent. Pseudopleurogram absent. Fracture lines absent. Rim absent. Wing(s) absent. Raphe not visible. Hilum present; fully concealed; concealed by funicular remnant; without faboid split; larger than punctiform; 0.1–1 mm long; with curved outline; elliptic; subapical to radicle tip; recessed; 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; partially concealing radicle, or completely concealing radicle; split over radicle (and lobes); with lobes; with lobes touching (auriculate); 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; oblique to length of seed; without a joint evident between the radicle and the cotyledons. Radicle differentiated from cotyledon; centered between cotyledons. Plumule glabrous.