Otoba lehmannii (Smith) Gentry (1979: 417)

Jaramillo-Vivanco, Tatiana S. & Balslev, Henrik, 2020, Revision of Otoba (Myristicaceae), Phytotaxa 441 (2), pp. 143-175 : 162-164

Otoba lehmannii (Smith) Gentry (1979: 417) .

Basionym: Dialyanthera lehmannii Smith (1937: 423) .

Type:— COLOMBIA. Río Timbiquí, Coteje , El Cauca, Lehmann 413, staminate (holotype: K!, NY, 2 photos; isotype: F!) .

Tree to 25 m tall; branchlets terete, usually pubescent. Petiole 40–70 × 8(–18 including wings) mm, winged; lamina 43 × 16 cm, elliptic to obovate–elliptic, base attenuate to obtuse, apex acute to cuspidate, rugose; usually ferruginous and densely pubescent below, sometimes becoming glabrescent; secondary veins 16–21(–29) per side, usually anastomosing; rarely with intramarginal veins somewhat evident but not raised. Staminate inflorescence axillary, to 12 cm long, sessile; partial inflorescences 1–3, 5 cm long, densely pubescent, ca. 50-flowered; umbelliform parts alternate, 7–12 flowers; bracteoles present. Staminate flowers with pedicel 4–9 mm long; perianth 5.0– 6.5 mm long, free or fused for 1/6 of its length, inner surface smooth, without a swollen ring, lobes 3; androecium 3.0– 4.5 mm long; filament column fused or free at the apex; anthers reniform, apex incurved, basally attached to the filament apex, 0.7– 1.3 mm long. Pistillate inflorescence similar to the staminate, but to 5 cm long; partial inflorescence ca. 15-flowered; umbelliform parts with 6 flowers. Pistillate flowers similar to staminate ones; gynoecium 4 mm long; ovary glabrous, bottle-shaped and short stalked, ca. 2 × 3 mm; stigmatic lobes fused along one side, 0.75–1.00 mm long. Infructescence with 3 fruits, up to 13 cm long. Fruit 4.0–6.0 × 4.0– 4.5 cm, globose; base truncate, stipitate; apex cuspidate, glabrous; pericarp 3–5 mm thick; aril white-yellow, transparent, entire or laciniate for 1/4 to 1/2 of its length; seed 3.0–3.5 × 2.2–2.7 cm, with a conspicuous apical prickle.

Representative specimens examined:— COLOMBIA. Antioquia: Municipio de Frontino, Murrí region, ca. 13 km from Nutibara, McPherson et al. 13415 ( MO). Bolívar: Munguillo, 1967, Arciria 77 ( HUA nv). Cauca: Parque Nacional Natural Munchique, vereda La Romelia, camino de Nueva Granada, 1993, González 2991 ( HUA nv). Chocó: River Baudó, 50 m above estuary of Quebrada Birudó, Loma Los Choritos, Fuchs & Zanella 21774 ( K). Nariño: Reserva Natural La Planada, camino desde la Reserva hacía Pialapí, 1991, Roldán et al. 2589 ( PSO nv). Norte de Santander: Vereda Cortinas, Corregimiento Samoré, 2012, Bravo et al. 510 ( UDBC nv). Quindío: Vereda Cruces, finca

El Palacio, 2002, Mendoza 940 ( FMB nv). Risaralda: Vereda La Suiza, 2002, Leo 862 ( FMB nv). Valle del Cauca: Bajo Calima, road to Juanchaco Palmeras, Gentry et al. 47857 ( MO).

Distribution:— Appears to occur only in Colombia ( Fig. 10) but may also be present in northern Venezuela and south to Ecuador, 0–2400 m. This species and O. gordoniifolia occur up to 2400 m.

Conservation status:— VU A4acd, vulnerable ( Cogollo et al. 2007).

Notes:— Latex whitish or transparent, leaves ferruginous below, inflorescence white, green to yellow and fruits green. In Colombia, flowers and fruits have been seen in March. Its wood is used for timber ( Cogollo et al. 2007).

Vernacular names:— Cuángare, guangare, castaño, otobo ( Colombia).