Guatteria wokomungensis Scharf & Maas

Maas, P. J. M., Westra, L. Y. T., Guerrero, S. Arias, Lobão, A. Q., Scharf, U., Zamora, N. A. & Erkens, R. H. J., 2015, Confronting a morphological nightmare: revision of the Neotropical genus Guatteria (Annonaceae), Blumea 60 (1), pp. 1-219 : 187

174. Guatteria wokomungensis Scharf & Maas — Map 34

Guatteria wokomungensis Scharf & Maas in Scharf et al. (2005) 570, f. 5. — Type: Forest Department British Guiana 7941 = R. Boyan 117 (holo NY; iso FDG, K), Guyana, Mt Ayanganna, 2 Mar. 1960.

Tree 3–8 m tall, c. 10 cm diam; young twigs glabrous. Leaves: petiole 3–6 mm long, 1–2 mm diam; lamina narrowly elliptic, 9–15 by 4–6 cm (leaf index 2.3–3.5), coriaceous, not verruculose,dull,pale grey or lead grey above,yellowish or dark greenish brown below, glabrous on both sides, but young primary vein covered with a dense row of hairs, base acute to obtuse, slightly attenuate, apex acuminate (acumen 5–15 mm long), primary vein impressed above, secondary veins distinct, 8–10 on either side of primary vein, raised above, loop-forming at right angles, forming a weak marginal vein, at a smallest distance of c. 2 mm from the margin, tertiary veins raised above, reticulate. Flowers in 1(–2)-flowered inflorescences in axils of leaves; flowering and fruiting pedicels 25–40 mm long, c. 1 mm diam, sparsely covered with erect hairs, articulated at 0.3–0.4 from the base, bracts 4–6, soon falling, not seen; flower buds broadly ovoid; se- pals free, broadly ovate-triangular, 4–6 by 4–5 mm, appressed to spreading, outer side glabrous; petals green or greenish yellow in vivo, narrowly rhombic, 20–25 by 7–8 mm, outer side densely covered with erect, curly hairs; stamens c. 2 mm long, connective shield papillate, flat or slightly umbonate. Monocarps 8–20, green in vivo, dull black in sicco, ellipsoid, 10–12 by 6 mm, glabrous, apex apiculate (apiculum <0.5 mm long), wall 0.2–0.3 mm thick, stipes 15–25 by c. 1 mm. Seed ellipsoid, c. 9 by 5 mm, dark brown, pitted, raphe raised.

Distribution — Guyana.

Habitat & Ecology — In mixed, non-inundated forest with Boba palms ( Socratea exorrhiza (Mart.) H.Wendl. ), Euterpe sp. , Clusia sp. , Schefflera sp. and Licania sp. , between cliffs or mountain slopes, on peat, sandstone, grey sandy clay or red clay. At elevations of 915–1375 m. Flowering: March, June to August; fruiting: March.

Vernacular name — Guyana: Arara (Arawak name) (Forest Department British Guiana 7941 = R. Boyan 117).

Note — Guatteria wokomungensis is a species occurring in the mountains of W Guyana. It is recognizable by a low number of secondary veins and long pedicels (up to 40 mm long), which are sometimes provided with foliaceous bracts.