13. Guatteria araracuarae Maas & Westra, sp. nov. — Map 5

Guatteria hispida affinis sed foliis vena marginali bene distincta (nec non venis secundariis arcte tantum conjunctis differt. —

Typus: Ronderos & Rosselli 58 (holo COAH), Colombia, Amazonas, cuenca del medio Caquetá, región de Araracuara, Comunidad de Peña Roja, bosque maduro de las terrazas altas del Río Caquetá, 160 m, 17 July 1996.

Guatteria sp. B Murillo A. & Restrepo (2000) 119, f. 36; Maas & Westra (2011) 141, f. 23.

Tree 3.5–16 m tall, 2.5–7 cm diam; young twigs densely to rather densely covered with long-persistent, erect, stiff hairs to c. 3 mm long. Leaves: petiole 3–5 mm long, 2–4 mm diam; lamina narrowly elliptic to narrowly obovate, 15–28 by 4–7 cm (leaf index 3–5), chartaceous, very densely verruculose, dull, brown to greyish brown above, brown below, sparsely covered with erect hairs mainly along primary vein above, densely covered with erect, stiff hairs to c. 3 mm long below, base obtuse, apex acuminate (acumen 10–20 mm long), primary vein impressed above, secondary veins distinct, 16– 22 on either side of primary vein, impressed above, forming a distinct marginal vein, at a smallest distance of 2–4 mm from the margin, tertiary veins inconspicuous and hardly visible above, percurrent to reticulate. Flowers solitary in axils of leaves or on leafless branchlets; flowering and fruiting pedicels (3–) 11 mm long, 1–2 mm diam, densely covered with long-persistent, erect, stiff hairs to c. 3 mm long, articulated at c. 0.1 from the base, bracts not countable in available material, uppermost bract ovate-elliptic, to c. 11 mm long; flower buds ovoid; sepals free, broadly ovate-triangular, 8–10 by 5–8 mm, appressed, apex acuminate, outer side densely covered with erect, brown hairs; petals green or white in vivo, oblong-ovate to elliptic, 8–15 by 4–10 mm, outer side densely covered with appressed, wooly hairs; stamens 1.5–2 mm long, connective shield papillate. Monocarps 5 –10, purplish black in vivo, black in sicco, ellipsoid, 15–20 by 8–9 mm, densely to sparsely covered with erect, stiff hairs to c. 2 mm long, apex rounded to apiculate (apicule <1 mm long), wall 0.5–0.7 mm thick, stipes 10–20 by 1 mm, densely covered with erect hairs. Seed ellipsoid, c. 15 by 7 mm, dark brown, horizontally and transversely grooved, raphe not distinct from rest of seed.

Distribution — Amazonian Colombia (Amazonas, Caquetá).

Habitat & Ecology — In non-inundated forest, on clayey to sandy soil. At elevations of up to 300 m. Flowering: July, November; fruiting: January, July.

Vernacular names — Colombia: Buruchicu (Muinane name) (Van Andel et al. 160), Carguero (Muinane name) (Cárdenas L. et al. 4064), Dujïku (Huitoto name) (Cárdenas L. et al. 4064), Jïdïra (Huitoto name) (Cárdenas L. et al. 4064), Ñaajeku (Muinane name) (Murillo A. et al. 510).

Other specimens examined. COLOMBIA, Amazonas, Puerto Santander, Monochoa, Cárdenas L. et al. 4064 (COAH, U); Río Caquetá, Leticia, Villa Azul, 200–270 m, Duque & Posada 4189 (U); Araracuara,Aeropuerto Restrepo, right margin of Río Caquetá, Quebrada Bocaduche, Murillo A. et al. 510 (COAH, COL, U); Villa Azul, Río Caquetá, Van Andel et al. 161 (COAH, U). Caquetá, Mun. Solano, Río Mesay, Raudal Masaca, 300 m, Cárdenas L. et al. 6772 (COAH, U).

Notes — Guatteria araracuarae looks similar to G. hispida as to the leaf shape and the dense indument of stiff erect hairs. It clearly differs from the latter, however, by the presence of a distinct marginal leaf vein, while in G. hispida the leaves do not show a marginal vein.

Murillo A. & Restrepo (2000) attributed the collection Stein et al. 4002 (MO, U) from Loreto, Peru, to this species as well.Actually, it is the type collection of G. grandipes Maas & Westra (2011).