Calliandra antioquiae

Macrophyllidious treelets 2 m and probably taller, with virgate long-shoots and densely thatched brachyblasts, glabrous except for sometimes puberulent ventral face of lf-axes or minutely ciliolate lfts, the sub-coriaceous brown-olivaceous lfts scarcely bicolored, the capitula of reportedly red fls arising singly from elaminate nodes of brachyblasts axillary to coeval or lately fallen lvs. Stipules firmly papery, triangular-lanceolate 4-8 x 1.5-3 mm, lustrous, striately nerved, persistent. Lf-formula i/1½, each pinna consisting of a perfect distal pair of lfts and one smaller posterior one inserted 1-2 mm above base of pinna-rachis; petioles 15-26(-40) mm, at middle 0.7-1 mm diam; rachis of pinnae 7-12 mm; lft-pulvinules 0.6-1.2 x 1.3-2 mm, coarsely cross-wrinkled; lft-blades narrowly or broadly elliptic from inequilateral base, obtuse apiculate, the distal pair 3.5-5.6 x 0.7-2 cm, ±2.8-3.7 times as long as wide; midrib displaced to divide blade ±l:2-2.5, almost straight, the inner posterior primary nerve almost as strong, produced well beyond midblade, the outer primary nerves progressively much shorter, the secondary and weak reticular venules prominulous dorsally, immersed on upper face. Peduncles stout, 2-3.5 cm, bracteate below middle; capitula ±20-fld, the subglobose receptacle ±2.5 mm diam; bracts ovate 1-1.5 mm, striate, persistent; fls homomorphic; pedicels cryptic 0.3-0.4 mm; perianth 5-merous glabrous, both calyx and corolla prominently striate; calyx campanulate 1.8-3.4 x 2.2-4 mm, the depressed-deltate or semicircular teeth 0.25-0.8 mm; corolla broadly tubular, slightly dilated upward, 8-9.5 mm, the lobes 1.5-2 mm; androecium 38-58-merous, 28-40 mm, the stemonozone 0.6-1.6 mm, the tube 6-8.5 mm, 1-3 mm shorter than corolla; ovary at anthesis glabrous; intrastaminal nectary 0. Pods 3-5 x 0.6-0.65 cm, glabrous, the marginal ribs in dorsal view ±2 mm wide, the recessed valves lignescent, umbonate over 1-2 seeds, sharply cross-venulose; seeds (few seen) compressed-ellipsoid, in broad view ±6.5 x 3.5 mm, the close-fitting testa smooth but not highly lustrous, brown, the pleurogram narrowly U-shaped 5 x 2 mm.