Desmopsis dukei G.E.Schatz, 2018

Schatz, G. E., Maas, P. J. M., Kamer, H. Maas-van de, Westra, L. Y. T. & Wieringa, J. J., 2018, Revision of the Neotropical genus Desmopsis (Annonaceae), Blumea 63 (1), pp. 67-86 : 74-75

7. Desmopsis dukei G.E.Schatz , sp. nov. — Fig. 2c ; Map 1

Desmopsis dukei is recognized by its leaves and pedicels which are densely covered with long-persisting erect hairs, relatively short flowering pedicels (10–16 mm long), with a leafy often soon falling basal bract, and a scale-like or leafy upper bract, and 10–20 monocarps borne on relatively long and slender stipes (12–25 mm long, 0.5–1 mm diam). — Type: Duke 8777 (holo MO; iso MO, US), Panama, Darién, Río Balsa , between Río Areti and Manane, 14 Sept. 1966 .

Tree or shrub 4–20 m tall, 5–7.5 cm diam; young twigs and petiole densely covered with long-persisting, pale brown, erect hairs to c. 0.5 mm long. Leaves: petiole 2–6 mm long, c. 1 mm diam; lamina elliptic, 8–18 by 4–9 cm, chartaceous, shiny and glabrous above, but often with a row of erect hairs along the primary vein, densely covered with long-persisting, pale brown, erect hairs to c. 0.3 mm long (velutinous) below, base acute to obtuse, apex acuminate (acumen 5–10 mm long), primary vein impressed above, secondary veins 7–9 on either side of primary vein, slightly raised above, tertiary veins flat to slightly raised above, reticulate. Inflorescence and flower indument: pedicels and sepals densely covered with long-persisting, pale brown, erect hairs to c. 0.5 mm long, outer side of bracts and petals densely to rather densely covered with appressed hairs. Inflorescences 1- or 2-flowered, leaf-opposed; pedicels 10–16 mm long, c. 1 mm diam, to c. 25 mm long and c. 2 mm diam in fruit; basal bract usually leafy, ovate, 2–12 by 1.5–8 mm, often soon falling, upper bract scale-like to comparable in size and shape to basal bract; sepals broadly triangular, 5–8 by 3–7 mm; petals yellow, subequal, narrowly triangular, 10–30 by 4–7 mm. Monocarps 10–20, yellow, orange, red, maturing purple-black, spherical to oblongoid, 9–18 by 7–14 mm, sparsely covered with appressed hairs, soon glabrous, apex rounded, sometimes slightly constricted between the seeds upon drying, wall c. 0.5 mm thick, stipes 12–25 mm long, 0.5–1 mm diam. Seeds 1–5, in one row, spherical, discoid or hemispherical, 7–9 by 4–6 mm, pitted.

Distribution — Costa Rica, Panama, Colombia (Antioquia, Chocó).

Habitat & Ecology — Tropical wet forest. At elevations of 0–500 m. Flowering: March, June, July, September; fruiting: February to April, June to September, November, December.

Vernacular names — Not recorded.

Other specimens examined. COLOMBIA, Antioquia, Turbo, Corregimiento Lomas Aisladas,Finca Las Aisladas, 30 m, Alzate & Cardona 1070 (U), 1258 (MO); 11 km despues de Barranquillita, 80 m, Brand & Cogollo 48 (JAUM, MO); 12 km despues de Barranquillita, 80 m, Brand & Cogollo 61 (JAUM, MO); 14 kms despues de Barranquillita, 80 m, Brand & Cogollo 138 (JAUM, MO); Carretera Tapón del Darién, sector Río León-lomas aisladas, km 37, 20 m, Brand & Lozano 912 (MO), 1063 (MO). Chocó, Riosuccio, orillas del Río Truando, en Teresita, Arcizia 159 (COL); Región de Urabá, Cerro del Cuchillo, Sector Noreste, 50–200 m, Cárdenas 815 (MO), Región de Urabá, Cerro del Cuchillo,Sector Noreste, 400–500 m, Cárdenas 855 (MO), 859 (MO), 863 (MO); Camino de Cidón a la Cumbre Sureste, 50–100 m, Cárdenas 2083 (HUA, JAUM, MO, U); Zona de Urabá, Cerros del Cuchillo, Sector Cuchillo Blanco (Piedemonte), 50–100 m, Cárdenas 2272 (MO); near Madurex Logging Camp above Teresita and below the rapids on R. Truando, Duke 9917 (MO, US); Parque Natural Nacional Los Katyos, Tilupo, camino quebrada del Medio, 250–330 m, León 487 (MO). – COSTA RICA, Limón, bosques cercanos al sitio de exploración petrolera,Suretka, 200 m, GomezLaurito 8808 (F). – PANAMA, Darién, parallel to Río Tucutí on ridge upstream c. 2 hrs (piragua) above Tucutí, 160 m, Duke 5266 (MO);Río Balsa,between Río Areti and Manene, 105–130 m, Duke 8798 (MO).

Note — Desmopsis dukei can be recognized by the long-persisting indument of erect hairs on the pedicels and lower side of leaves and relatively short pedicels (10–25 mm long).

Figures

Map 1 Distribution of Desmopsis bibracteata (B.L.Rob.) Saff.(●), D. colombiana G.E.Schatz & Maas (■) and D. dukei G.E. Schatz (▲).

Fig. 2 a. Desmopsis colombiana G.E.Schatz & Maas. Flowering branch. — b. Desmopsis confusa G.E.Schatz, N. Zamora & Maas. Fruiting branch. — c. Desmopsis dukei G.E.Schatz. Fruiting branch. — d. Desmopsis nigrescens G.E.Schatz. Fruiting branch (a: Cogollo & Borja 741; b: Busey 650, type; c: Duke 8777, type; d: Liesner 1038, type; all MO).