Cremastosperma westrae Pirie

Tree or shrub 4–8 m tall; young twigs and petioles sparsely to densely covered with appressed brown hairs ca. 0.1 mm long. Leaves: petioles 6–20 by 3–6 mm; lamina narrowly elliptic to slightly obovate or narrowly so, (15–)30–50 by (8–)12–20 cm (index 1.6–3), chartaceous to coriaceous, dark to olive green or brown above, lighter below, glabrous above, sparsely covered with appressed whitish hairs 0.1 mm long on veins below, base acute to rounded, apex acuminate (acumen 10–20 mm long), primary vein 2–5 mm wide at widest point, secondary veins 8–12, no intersecondary veins, distance between from 5–10 mm at the base to 40–60 mm closer to the apex, angles with primary vein from 50–80° at the base to 45–60° closer to the apex, not branching, forming more or less distinct loops in apical half, smallest distance between loops and margin 2–5 mm, tertiary veins mostly percurrent. Inflorescence of single, solitary flowers, on leafy or leafless twigs; peduncles, 2–3 by 2–3 mm (in fruit); pedicels 6–17 by 2–3 mm (in fruit), peduncles and pedicels rather densely to densely covered with erect whitish hairs 0.1 mm long; single lower bract, soon falling off; upper bract attached in the basal half of the pedicel, depressed ovate, ca. 1.5 by 2 mm, rounded, outer side densely covered with appressed brown hairs 0.2 mm long; closed flower buds depressed ovoid, flowers yellow in vivo, black with yellow indument in sicco; sepals free or fused for basal 0.5 mm, deltate, appressed, 2.5–3 by 2.5–3 mm, rounded, often persistent, densely covered (outside, sparsely inside) with appressed brown hairs 0.2 mm long; outer petals elliptic to slightly ovate, ca. 9 by 5 mm, rather densely to densely covered (outside, sparsely inside) with appressed brown hairs ca. 0.2 mm long, inner petals elliptic, ca. 8 by 4 mm, rather densely to densely (towards the apex outside, sparsely inside and at base) covered with appressed brown hairs 0.2 mm long; androecium ca. 6 mm diam., stamens ca. 1.3 mm long, connective appendage ca. 0.7 mm wide; gynoecium ca. 1 mm diam., carpels sparsely covered with erect brown hairs <0.1 mm long. Monocarps 6–10, ellipsoid, slightly asymmetrical, 18–22 by 10–12 mm, green, maturing to yellow, orange, red or black in vivo, reddish- to blackish-brown in sicco, with a small excentric apicule; stipes 4–14 by 1–2 mm; fruiting receptacle depressed ovoid, 3–6 mm diam.; monocarps and stipes sparsely to rather densely covered with erect whitish hairs <0.1 mm long or glabrous, receptacle densely covered with erect whitish hairs <0.1 mm long. Seeds ellipsoid, reddish-brown, surface wrinkled and slightly pitted, ca. 16 by 10 mm, raphe slightly sunken, encircling seed longitudinally.

Panama (Darién, Panamá, San Blas).