Subfamily: Faboideae.
Phylogenetic Number: 3.10.47.
Tribe: Phaseoleae.
Subtribe: Kennediinae.
Species Studied - Species in Genus: 10 studied; 15 in genus.
Fruit: A legume; unilocular; 3–7 cm long; 0.7–1.2 cm wide; 0.3–0.7 cm thick; 2–9 times longer than wide; with deciduous androecial sheath; with deciduous corolla; with persistent calyx; with calyx shorter than fruit; without orifice formed by curving of fruit or fruit segments; straight; not plicate; not twisted; symmetrical (or nearly symmetrical); linear; not inflated; compressed; without beak; tapered at apex; aligned with longitudinal axis of fruit to oblique with longitudinal axis of fruit; short tapered at base to tapered at base; aligned with longitudinal axis of fruit to oblique with longitudinal axis of fruit; with the apex and base uniform in texture; chartaceous to coriaceous; seed chambers externally visible, or invisible; margin not constricted, or constricted (rarely slightly); margin slightly constricted along both margins; margin without sulcus; margin plain, or embellished; margin with thickened sutural areas; wing(s) absent; nonstipitate; with all layers dehiscing; splitting along suture(s). Dehiscence of valves along both sutures; apical and down; active; with valves twisting. Replum invisible. Epicarp dull; monochrome; light to dark brown; with surface texture uniform; pubescent and indurate, or glabrous, or pubescent but soon deciduous; with hairs erect; with 1 type of pubescence; tomentose, or sericeous; with pubescence gray-brown, or gray; with pubescence uniformly distributed; with simple hairs; pliable; with hair bases plain; eglandular; without spines; smooth, or not smooth; with elevated features; not veined; not tuberculate; drying wrinkled; not exfoliating; without cracks; without embedded tissue, much thicker than epicarp, running from base to apex. Mesocarp present; thin; surface not veined; 2-layered; without balsamic vesicles; without fibers; without reniform canals; with spongy layer over solid layer; coriaceous. Endocarp present; visible; dull; opaque; monochrome, or mottled; brown, or tan; with mottling more or less uniform and over seed chambers (dark); with brown overlay; smooth; without adhering pieces of testa; septate; with septa thin (tissue paper-like), flexible; chartaceous; exfoliating in part; remaining fused to mesocarp and epicarp; without wings; entire. Seed(s) 4–9; length transverse to fruit length, or oblique to fruit length; neither overlapping nor touching; in 1 series. Funiculus 0.5–2.5 mm long; of 1 length only; flattened; triangular. Aril present; fleshy; when fleshy annular (bulbous and partially extended over lens at end opposite radicle lobe, narrow at end near radicle lobe); entire to crenate; covering less than 1/2 of seed; with tongues (or flap) on lips of 2-lipped rim-aril; with 1 tongue or flap on 1 lip of 2-lipped rim-aril; tan.
Seed: 3.7–8.5 mm long; 3.8–5 mm wide (including aril); 2.8–2.9 mm thick; not overgrown; not angular; asymmetrical; reniform; terete; 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, or mottled; with frequent mottles; brown (or dark brown); with brown overlay (darker); glabrous; smooth; coriaceous. Pleurogram absent. Pseudopleurogram absent. Fracture lines absent. Rim absent. Wing(s) absent. Raphe not visible. Hilum present; partially concealed; concealed by aril; with faboid split; with the lips of the faboid split the same color as the rest of the hilum; larger than punctiform; 2.4 mm long; with curved outline; elliptic; marginal according to radicle tip; flush; within halo; halo darker than testa. Lens discernible (but mostly hidden by aril); 0.5–1.5 mm long; with margins straight; linear; not in groove of raphe; confluent with hilum; flush; similar color as testa; darker than testa; within halo; halo color darker than testa. Endosperm present; thick; not pluglike and not resembling tip of radicle; covering entire embryo; adnate to embryo. Cotyledons not smooth; sulcate; 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; not concealing radicle; entire over radicle; without lobes; with the interface division terminating at base of radicle; without margins recessed; tan; inner face flat; glabrous on inner face. Embryonic axis oblique; oblique to length of seed, or parallel to length of seed; without a joint evident between the radicle and the cotyledons. Radicle differentiated from cotyledon; bulbose; lobe tip curved; oblique to cotyledons; centered between cotyledons; less than 1/2 length of cotyledons. Plumule well developed; glabrous.