Guatteria crassivenia N.Zamora & Maas, 2015

42. Guatteria crassivenia N.Zamora & Maas View in CoL , sp. nov. — Fig. 24f View Fig , 30 View Fig ; Map 8

Foliis nitidis, verruculosis, venulis omnino distincte prominentibus bene distincta. — Typus: Herrera C. & Chacón 2746 (holo INB; iso U), Costa Rica, Limón, Cantón de Limón, El Progreso, área de suelos inundados entre 1500–1700 m , Fila Matama, 1600 m, 24 Abril 1989.

Tree c. 6 m tall, diam not recorded; young twigs densely covered with appressed, brown hairs, soon glabrous. Leaves: petiole 0–3 mm long, 1–2 mm diam; lamina elliptic, 6–12 by 3.5–5 cm (leaf index 1.5–2.5), chartaceous, densely verruculose along primary vein to sparsely so elsewhere, shiny, dark brown above, brown below, densely to rather densely covered with erect, brown hairs on primary vein above, glabrous elsewhere, sparsely covered with appressed to more or less erect hairs below, base acute to slightly attenuate, apex acute to acuminate (acumen 5–15 mm long), primary vein raised above, secondary veins distinct, 12 –22 on either side of primary vein, strongly raised above, smallest distance between loops and margin 1–2 mm, tertiary veins strongly raised above, reticulate. Flowers solitary, in axils of leaves; pedicels 10–25 mm long, c. 1 mm diam, densely to rather densely covered with appressed hairs, articulated at 0.3–0.5 from the base, bracts c. 5, soon falling, not seen; flower buds depressed ovoid; sepals free, broadly ovate-triangular, 3–6 by 4–5 mm, appressed, finally reflexed, outer side sparsely covered with appressed to more or less erect hairs; petals yellow in vivo, ovate, 10–15 by 6–11 mm, outer side densely covered with appressed hairs; stamens c. 1.5 mm long, connective shield papillate. Monocarps and seed not seen.

Distribution — Costa Rica ( Limón).

Habitat & Ecology — In wet forest. At an elevation of c. 1600 m. Flowering: April; fruiting: unknown.

Vernacular names — Not recorded.

Note — Guatteria crassivenia , endemic to Costa Rica and only once collected, is very easily recognized by its shiny leaves which are densely verruculose, particularly near the primary vein, by their primary vein which is raised on the upper side, and by the very prominent venation on both sides.