Cremastosperma magdalenae Pirie

Tree 3–7 m tall; young twigs glabrous. Leaves: petioles 6–14 mm long, 2–3 mm diam.; lamina narrowly elliptic to elliptic, 20–28 by 7–9 cm (index 2.5–3.1), chartaceous to subcoriaceous, olive to more lime green or brown above, darker below, glabrous on both sides, base obtuse to acute, apex acuminate (acumen 5–10 mm long), primary vein deeply grooved in basal 1/2 – 3/4, occasionally verrucose below, ca. 2 mm wide at widest point, glabrous, secondary veins 9–14, often 2 or 3 intersecondary veins, distance between from 4–5 mm at the base to 20–35 mm closer to the apex, angles with primary vein from 40–50° at the base to 70–80° closer to the apex, occasionally branching, occasionally forming more or less indistinct loops in the apical half, smallest distance between loops and margin 2–4 mm, tertiary veins rather reticulate. Inflorescences of single flowers, solitary or clustered in groups of two, axillary on leafy twigs; peduncles 2–3 by ca. 2 mm (in fruit); pedicels ca. 7 by 1 mm at the base, 1.5 mm at the apex (in flower), 16–20 by 1.5–2 mm at the base, ca. 3 mm at the apex (in fruit), peduncles and pedicels glabrous, two lower bracts, the apical one depressed triangular, ca. 1.5 by 2 mm, acute, persistent, glabrous, upper bract attached around midway along pedicel, broadly ovate to deltate, 0.5–2.5 by 1–2.5 mm, actute to obtuse, glabrous; closed flower buds not seen; flowers in vivo immature light green, black in sicco, sepals and petals glabrous; sepals fused for basal 1 mm, broadly to very broadly ovate, appressed, (2–) 5–7 by (2–)–5 mm, acute, mostly persistent, outer petals elliptic, ca. 12 by 7 mm, inner petals narrowly elliptic, ca. 12 by 5 m; androecium 2.5–2.7 mm diam., stamens ca. 0.7 mm long, connective appendage 0.3–0.4 mm wide. Monocarps 20–30, globose, symmetrical, 12–13 by 12–13 mm, green maturing to red in vivo, black in sicco, with a slightly excentric, 0.25 mm long apicule; stipes (immature) 9–10 by 1–1.5 mm; fruiting receptacle depressed ovoid, 7–9 mm diam. (only immature fruits seen); monocarps, stipes and receptacle glabrous. Seeds globose, shallowly pitted with a papery outer layer, ca. 13 by 11 mm, orange-brown, raphe neither raised nor sunken, regular.

Colombia (Antioquia, west side of the Magdalena valley).

Cremastosperma magdalenae là loài thực vật có hoa thuộc họ Na. Loài này được Pirie mô tả khoa học đầu tiên năm 2005.