Guatteria grandipes Maas & Westra, 2011

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 : 91-92

75. Guatteria grandipes Maas & Westra — Map 17

Guatteria grandipes Maas & Westra in Erkens et al. (2008) 497, f. 11; Maas & Westra (2011) 127. — Type: Stein et al. 4002 (holo MO; iso F,U), Peru, Lo- reto, Prov.Ramón Castilla,trail inland from Pucaurquillo , up Río Ampiyacu from Pebas, 140 m, 31 Jan. 1987.

Tree or shrub 4–6 m tall, diam not recorded; young twigs densely covered with erect, rough, brown hairs (‘hirsute’) 1.5–2.5 mm long. Leaves: petiole c. 5 mm long, 2–3 mm diam; lamina narrowly obovate to narrowly elliptic, 16–23 by 4–7 cm (leaf index 3.3–4), coriaceous, densely verruculose, dull, brown to greenish brown above, brown below, glabrous above, densely covered with erect, rough, brown hairs (‘hirsute’) 1.5–2.5 mm long below, base acute, apex acuminate (acumen 5–15 mm long), primary vein impressed above, secondary veins distinct, 15– 25 on either side of primary vein, impressed to flat above, forming a marginal vein, at a smallest distance of 2–3 mm from the margin, tertiary veins inconspicuous, flat above, slightly percurrent. Flowers solitary in axils of leaves; flowering and fruiting pedicels 40–90 mm long, c. 1 mm diam, densely to rather densely covered with erect, rough, brown hairs (‘hirsute’) 1.5–2.5 mm long, articulated at c. 0.1 from the base, bracts soon falling, not seen; flower buds subglobose; sepals free, ovate, 11–12 by c. 6 mm, appressed, outer side densely cov- ered with appressed, white hairs; petals greenish cream in vivo, young ones ovate, c. 14 by 8 mm, outer side densely covered with appressed, white hairs; stamens c. 2 mm long, connective shield papillate. Monocarps c. 15, green in vivo, brown in sicco, ellipsoid, 15–16 by c. 7 mm, rather densely covered with erect hairs, apex apiculate (apiculum <0.2 mm long), wall 0.2–0.3 mm thick, stipes 15–17 by c. 1 mm. Seed ellipsoid, 15–16 by 7 mm, pale brown, rugose, raphe not distinct from rest of seed.

Distribution — Amazonian Peru (Loreto).

Habitat & Ecology — In forest (the type collection from ‘swampy forest’), on lateritic to clayey soil. At elevations of 120–150 m. Flowering: August; fruiting: January, August .

Vernacular names — Not recorded.

Note — Guatteria grandipes falls within Fries’s sect. Mecocarpus by its verruculose leaves, provided with a marginal vein. It differs from all species of that section by extremely long pedicels of up to c. 90 mm long.