Colvillea

Taxonomy

Colvillea W. Bojer In W. J. Hooker, Bot. Mag. t. 3325, 3326. 1 Jun 1834.

Subfamily: Caesalpinioideae.
Phylogenetic Number: 1.1.23.
Tribe: Caesalpinieae.
Group: Peltophorum.
Species Studied - Species in Genus: 1 studied; 1 in genus.

Description

Fruit: A legume; unilocular; 26–27 cm long; 4–6 cm wide; 1–1.2 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; not plicate; not twisted; symmetrical; oblong; not inflated; flattened; without beak; long 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; ligneous; seed chambers externally visible (faint); margin not constricted; margin without sulcus; margin embellished; margin with wing(s); wing(s) present; wing(s) 1; wing(s) 5–12 mm wide; wing(s) sutural; wing(s) on 1 suture; substipitate; with all layers dehiscing; splitting along suture(s). Dehiscence of valves along both sutures; passive. Replum invisible. Epicarp dull to glossy; monochrome; dark brown; with surface texture uniform; glabrous; eglandular; without spines; not smooth; with elevated features; not veined; not tuberculate; rugose; checking and breaking into large plates but not exfoliating; with cracks; cracking transverse to fruit length; without embedded tissue, much thicker than epicarp, running from base to apex. Mesocarp present; surface not veined; 2-layered; without balsamic vesicles; with fibers; without reniform canals; with fibers longitudinally over mealy tissue; ligneous. Endocarp present; visible; dull; opaque; monochrome; tan; without adhering pieces of testa; subseptate; not exfoliating; remaining fused to mesocarp and epicarp; entire. Seed(s) 11–15; length transverse to fruit length; neither overlapping nor touching; in 1 series. Funiculus 6–7 mm long; of 1 length only; thick; curved (near the seed). Aril absent.

Seed: 17–78 mm long; 7–10 mm wide; 3–4 mm thick; not overgrown; not angular; symmetrical, or asymmetrical; oblong to 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; glossy; not modified by a bloom; colored; mottled; brown and yellow; with brown overlay; glabrous; smooth; osseous. Pleurogram absent. Pseudopleurogram absent. Fracture lines present; reticulate (in a concentric manner). Rim absent. Wing(s) absent. Raphe not visible. Hilum present; fully concealed; concealed by funicular remnant; without faboid split; punctiform; subapical to radicle tip; flush; not within corona, halo, or rim. Lens discernible; 0.3–0.5 mm long; with margins curved; elliptic; not in groove of raphe; mounded, or flush; dissimilar color from testa; black, or tan; not within corona, halo, or rim. Endosperm present; thin; not pluglike and not resembling tip of radicle; adnate to testa. 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; centered between cotyledons. Plumule well developed; glabrous.

Distribution