Fillaeopsis

Taxonomy

Fillaeopsis H.A.T. Harms Bot. Jahrb. Syst. 26: 258. 31 Jan 1899.

Subfamily: Mimosoideae.
Phylogenetic Number: 2.3.03.
Tribe: Mimoseae.
Group: Fillaeopsis.
Species Studied - Species in Genus: 1 studied; 1 in genus.

Description

Fruit: A legume; unilocular; 20–60 cm long; 10–20 cm wide; 0.1–0.4 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 to curved; not plicate; not twisted; asymmetrical; broadly oblong; not inflated; flattened; without beak; rounded at apex; aligned with longitudinal axis of fruit; tapered at base to rounded at base; slightly oblique with longitudinal axis of fruit; with the apex and base uniform in texture; sub coriaceous; seed chambers externally invisible; margin constricted; margin slightly constricted along both margins; margin without sulcus; margin plain; wing(s) absent; stipitate; with the stipe up to 10 mm long; with all layers dehiscing; splitting along suture(s). Dehiscence of valves along both sutures; medial and up and down; passive, or active; with valves occasionally twisting. Replum invisible. Epicarp glossy; monochrome; brown; with surface texture uniform; glabrous; eglandular; without spines; not smooth; with elevated features; veined; transversely veined relative to fruit length; not tuberculate; transversed ribbed (ca. 4 cm apart); exfoliating in part; without cracks; without embedded tissue, much thicker than epicarp, running from base to apex. Mesocarp absent. Endocarp present; visible; dull; opaque; monochrome; brown; transversely reticulate (fibrous below surface); without adhering pieces of testa; nonseptate (but with straw-colored transverse lines between seeds up to 3 cm long and about 4 cm apart); not exfoliating; entire. Seed(s) up to 10; length transverse to fruit length; neither overlapping nor touching; in 1 series. Funiculus 6–7 mm long; of 1 length only; filiform; curved. Aril absent.

Seed: 70–130 mm long; 25–35 mm wide; 0.01–0.03 mm thick; not overgrown; angular; symmetrical; oblong; 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; brown; glabrous; not smooth; with elevated features; rugose; chartaceous. Pleurogram absent. Pseudopleurogram absent. Fracture lines absent. Rim absent. Wing(s) present; conspicuous continuous around seed (5–25 mm wide (widest at each end)). Raphe not visible. Hilum present; fully concealed; concealed by wing; without faboid split; punctiform; 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 flat; 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; notched at radicle; with the interface division terminating at base of radicle; without margins recessed; inner face flat; glabrous on inner face. Embryonic axis straight; perpendicular to length of seed; without a joint evident between the radicle and the cotyledons. Radicle differentiated from cotyledon; straight with embryonic axis; centered between cotyledons. Plumule rudimentary; glabrous.

Distribution