Vouacapoua

Taxonomy

Vouacapoua J.B.C.F. Aublet Hist. Pl. Guiane Suppl. 9. Jun 1775.

Subfamily: Caesalpinioideae.
Phylogenetic Number: 1.1.08.
Tribe: Caesalpinieae.
Group: Peltophorum.
Species Studied - Species in Genus: 3 studied; 3 in genus.

Description

Fruit: A legumelegume:
usually dry, dehiscent fruit derived from a single carpel that opens along two longitudinal sutures
; unilocular; 7–9 cm long; 4.5–6 cm wide; 2.5–4 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; oblanceolate; not inflated; compressed to terete; without beak; tapered at apex, or long tapered at apex; aligned with longitudinal axis of fruit; tapered at base, or long tapered at base; oblique with longitudinal axis of fruit; with the apex and base uniform in texture; ligneous; seed chambers externally visible; 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. Replum invisible. Epicarp dull; monochrome; brown (reddish); with surface texture uniform; pubescent and indurate (reddish brown); with hairs erect; eglandular; without spines; not smooth; with elevated features; not veined; not tuberculate; warty; 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; ligneous. Endocarp present; visible; dull; opaque; monochrome; brown to tan (reddish to reddish tan); spongy; without adhering pieces of testa; nonseptate; not exfoliating; remaining fused to mesocarp and epicarp; entire. Seed(s) 1; length parallel with fruit length. Funiculus 0.1–1.5 mm long; of 1 length only; flattened; triangular. Aril absent.

Seed: 35–45 mm long; 30–35 mm wide; 27–30 mm thick; not overgrown; not angular; symmetrical; circular (subcircular); 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; brown (reddish); glabrous; not smooth; with elevated features; rugose; nearly osseous. Pleurogram absent. Pseudopleurogram absent. Fracture lines absent. Rim absent. Wing(s) absent. Raphe visible, or not visible (faint if present). Hilum present; fully concealed; concealed by funicular remnant; without faboid split; larger than punctiform; 0.1–3 mm long; with curved outline; elliptic to circular; marginal according 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; completely concealing radicle; entire over radicle; with the interface division terminating at base of radicle; without margins recessed; inner face concave; 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 moderately developed; glabrous.

Distribution

Guianas and Brazil (Amazonia).

New World; South America (Guianas and Brazil (Amazonia)); Brazil and Ecuador.