Oxandra bolivarensis Maas & Junikka, 2016

Junikka, L., Maas, P. J. M., Maas-van de Kamer, H. & Westra, L. Y. Th., 2016, Revision of Oxandra (Annonaceae), Blumea 61 (3), pp. 215-266 : 225

3. Oxandra bolivarensis Maas & Junikka , sp. nov. — Fig. 5 ; Map 1

Foliis anguste ovatis, apice acutis, floribus breviter pedicellatis, monocarpiisque pro ratione paucis facile recognoscenda. — Typus: Forero & Jaramillo 493 (holo MO; iso NY), Colombia, Bolívar , Morales, Cerros rocosos, calcáreos, 80 m, 22 Apr. 1966 .

Tree 3–7 m tall, c. 12 cm diam; young twigs slightly grooved, densely covered with erect hairs <0.1 mm long, soon glabrous. Leaves: petiole 2–3 mm long, 0.5–1 mm diam; lamina narrowly ovate,7–10 by 2.5–3 cm (leaf index 3–3.6),chartaceous,not verruculose, shiny and dark brown to blackish brown above, brown below, glabrous above, rather densely covered with appressed hairs, but very soon glabrous below, base obtuse, apex acute, primary vein impressed to flat above, secondary veins distinct, 8–10 on either side of primary vein, raised above, angle of secondary veins with primary vein 50–60°, smallest distance between loops and margin c. 2 mm, tertiary veins raised above, reticulate. Flowers in 1–2-flowered inflorescences; flowering pedicels 1–2 mm long, c. 1 mm diam, fruiting pedicels 2–4 mm long, 1–2 mm diam, glabrous; bracts 5–7, depressed ovate, c. 1 by 1.5 mm, outer side sparsely covered with appressed hairs to glabrous; flower buds globose; sepals shallowly ovate-triangular, 1–2 by 1.5–2 mm, outer side glabrous; petals creamy white, elliptic, 4–7 by 3–4 mm, outer side glabrous; stamens c. 25, 1.5–2 mm long, apex of connective narrowly triangular to depressed ovate; carpels ≤ 3. Monocarps 1–3, green, maturing black in vivo, black in sicco, globose, 11– 20 by 11– 20 mm, glabrous, apex rounded, wall 2–3 mm thick, stipes absent. Seed globose, 10–20 by 10 mm, brown, surface minutely pitted, ruminations spiniform.

Distribution — Colombia (Bolívar).

Habitat & Ecology — In disturbed moist forest.At elevations of 200–250 m. Flowering: April, September; fruiting: January, April, September.

Other specimens examined. COLOMBIA, Bolívar, Mun. San Juan de Nepomuceno, Loma de los Colorados, 200 m, Cuadros V. 3155 (MO, NY, U); Santuario Nacional de los Colorados, Mun. San Juan Nepomuceno, 70 km SW of Cartagena, 230–250 m, Gentry et al. 60575 (MO, U).

Note — Oxandra bolivarensis is characterized by narrowly ovate, shiny and acute-tipped leaves, short pedicels, and few (1–3), globose monocarps. The monocarps of O. bolivarensis have an extremely thick wall for a species of Oxandra .

Figures

Map 1 Distribution of Oxandra aberrans (●), O. asbeckii (●) and O. bolivarensis (▲).

Fig. 5 Oxandra bolivarensis Maas & Junikka. Flowering and fruiting branch. (Cuadros V. 3155, MO).