Broad-crowned microphyllidious cauliflorous trees 6-35 m with blackish or light brown trunk potentially 6 dm dbh, sometimes branched from base upward, the young stems and all axes of lvs and inflorescence densely finely pilosulous with spreading, ± sinous, brown hairs to 0.3-0.5 mm, the bicolored lfts either glabrous overall or thinly ciliolate along midrib dorsally, above glossy dark green and convex, paler dull beneath, the inflorescence composed of short sessile spikes fasciculate on knots along the trunk and on annotinous and older branches well below coeval foliage. Stipules firm, lanceolate 2—4 x 0.6-1.2 mm, brown-silky dorsally, glabrous within, not visibly venulose, deciduous, the terminal resting- buds of similar, loosely imbricate scales. Lf-formula vi_x (-xi)/( 16-) 18-27; lvs sessile, the lf-stk including pulvinus 7-12 cm, the very short first pinna-pair inserted close to lf-pulvinus and deflexed amplexicaulous, the longer distal interpinnal segments 10-18 cm; between first pinna-pair a sessile, shallow-cupular thick-rimmed, dark reddish brown nectary 0.8-1.4 mm diam, similar but smaller ones between 1-3 furthest pinna-pairs and often a minute one at tip of some pinna-rachises; pinnae strongly decrescent downward from below mid-lf, thence subequilong, the rachis of longer ones 4.5-8 cm, the longer inter- foliolar segments 2-4.5 mm; lfts abruptly decrescent near base of pinna-rachis (the anterior of the first pair often reduced to a paraphyllidium), slightly or scarcely decrescent distally, all sessile against rachis, the pulvinule 0.2-0.4 mm in dorsal view, wider than long, the lft-blades narrowly rhombic-oblong from obliquely truncate, postically blunt-auriculate base, triangular and sharply apiculate at the more or less porrect apex, the longer ones 7-12 x 2-5 mm, (2.4-) 2.6-3.5 times as long as wide; venation of mature lfts mostly reduced to the simple midrib, this only slightly forwardly displaced beyond midblade, but 1 weak primary nerve sometimes produced, on posterior side of midrib, well beyond midblade but not brochidodrome, tertiary venules not externally evident. Fl-spikes sessile, the axis 8-13 mm; bracts deltate 1.2-1.5 mm, like the whole perianth densely pilosulous externally overall; calyx campanulate 1.9- 2 mm, nearly as wide, the depressed-deltate teeth 0.35-0.5 mm; corolla "white," subcylindric 5-7 mm, the ascending lanceolate teeth 1.3-1.8 mm; androecium 34—42-merous, 15.5-18 mm, the stemonozone 0.6 mm, the included tube 3.5-5 mm, the tassel reddish distally; nectarial disc ±0.3 mm tall, twice as wide; ovary at anthesis glabrous, narrowly ellipsoid tapering into the style; stigma minute poriform. Pods (Larpin 867 + photos; de Granville 5872, NY) pendulous, sessile, in profile falcately linear 8.5-11 x 0.6 cm, 8-9-seeded, bluntly tetragonal (not laterally compressed), the thick, rigidly ligneous, transversely dilate, longitudinally shallow-sulcate sutures as wide as the pod itself, in section ±1 mm thick, the valves as thick but only half as wide, scarcely elevated over seeds, the whole fruit densely minutely brownish- pilosulous overall; dehiscence follicular, through the seminiferous (convexly arcuate) suture, the valves gaping widely; seeds basipetal, discretely uniseriate, narrowly ellipsoid 10.5(-"15") x 3(-"6") mm, the testa when dry papery castaneous exareolate, described as "greenish white, peripherally pink" when fresh.

In lowland primary forest, at least sometimes on stream banks, and ascending on Montagnes de la Trinite to scrub-forest on granite at 470 m, locally plentiful but known only from the basins of the Sinnamary and Approuague/Arataye rivers in N and N-centr. French Guiana (±3°10'N, 52°40'-53°25'W). — Map 24. — Fl. VII(-?).