Guatteria wachenheimii Benoist

173. Guatteria wachenheimii Benoist View in CoL — Fig. 87 View Fig , 88a, b View Fig ; Map 34

Guatteria wachenheimii Benoist (1927) 270; R. E.Fr. (1939) 484. — Type: Wachenheim 201 (holo P; iso MO, P), French Guiana, Godebert, May 1920 .

Guatteria microsperma R.E.Fr. (1957c) 236. — Type: Cowan 38259 (holo S; iso NY, RB 2 sheets), Brazil, Amapá, Serra do Navio, Rio Amapari ,N slopes of Observatorio Ore Body , 200 m, 11 Nov. 1954.

Tree 4–18 m tall, 2–50 cm diam; young twigs sparsely covered with erect hairs, soon glabrous. Leaves: petiole 4–9 mm long, 1–2 mm diam; lamina narrowly elliptic, 11–25 by 3–9 cm (leaf index 2.6–3.8), chartaceous, not verruculose, scabridulous, dull, grey to greyish green above, green to brown below, glabrous above and below, base acute, often distinctly attenuate, apex acuminate (acumen 5–20 mm long), primary vein im- pressed above, secondary veins distinct, 12–18 on either side of primary vein, impressed above, loop-forming at almost right angles and forming a marginal vein, at a smallest distance of 3–6 mm from the margin, tertiary veins inconspicuous or conspicuous, flat to slightly raised above, reticulate. Flowers in 1–2-flowered inflorescences in axils of leaves or mostly on leafless branchlets, or plant cauliflorous; pedicels 10–25 mm long, 1–1.5 mm diam, fruiting pedicels to c. 2 mm diam, glabrous, articulated at 0.2–0.4 from the base, bracts 5–7, soon falling, basal ones very broadly or transversely elliptic, to c. 1 mm long, the upper ones not seen; flower buds depressed ovoid; sepals free, broadly ovate-triangular, 3–4 by 3–5 mm, appressed, outer side sparsely covered with appressed hairs, at the very margins and very apex densely so; petals green, maturing yellow in vivo, ovate, 11–20 by 6–8 mm, outer side densely covered with appressed hairs; stamens c. 2 mm long, connec- tive shield hairy. Monocarps 20–40, deep red in vivo, brown or black in sicco, ellipsoid, 6–9 by 3–4 mm, glabrous, but sparsely covered with appressed hairs at base and apex, apex rounded to apiculate (apiculum <0.5 mm long), wall 0.1–0.2 mm thick, stipes 2–6 by 0.5–1 mm. Seed ellipsoid or slightly obovoid, 6–8 by 3–4 mm, reddish brown, pitted and with few longitudinal grooves, raphe not distinct from rest of seed.

Distribution — Guyana, Suriname, French Guiana, Amazo- nian Brazil (Amapá).

Habitat & Ecology — In non-inundated forest, often on brown, lateritic soil. At elevations of 0–1000 m. Flowering: March to May, September; fruiting: January to March,August to December.

Vernacular names — Brazil: Envira-cheirosa (N.A. Rosa 1040). French Guiana: Mamayawé (Creole name). Suriname: Panta (Sranang name) (Lindeman 5795, 5892).

Note — Guatteria wachenheimii is very easily recognizable by the scabridulous leaves which have a marginal vein and by its very small monocarps (hence the specific epithet for the synonymous G. microcarpa ).