Guatteria trichocarpa Erkens & 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 : 175-177

164. Guatteria trichocarpa Erkens & Maas — Map 36

Guatteria trichocarpa Erkens & Maas (2008) 404; Maas & Westra (2011) 139, f. 21, 22. — Guatteriella tomentosa R.E.Fr. (1939) 541, f. 39; Murillo A.& Restrepo (2000) 124, f. 38. — Type: Ducke RB 23916 (holo S; iso RB, SPF), Brazil, Amazonas, São Paulo de Olivença, Rio Solimões, 25 Feb. 1932; not Guatteria tomentosa Rusby (1910) .

Tree or shrub 3–20 m tall, 11–80 cm diam; young twigs densely covered with a velutinous indument of erect and appressed, long-persistent hairs. Leaves: petiole 5–10 mm long, 1–4 mm diam; lamina narrowly oblong-ovate, 18–30 by 4–8 cm (leaf index 2.6–4.5), chartaceous, rather densely to sparsely verruculose, greyish to blackish brown above, brown below, glabrous above, but hairy primary vein densely covered with erect, brown hairs, densely covered with appressed and erect, brown hairs 3–4 mm long below, base obtuse to rounded, apex acuminate (acumen 15–30 mm long), primary vein impressed above, secondary veins distinct, 15–30 on either side of primary vein, raised above, smallest distance between loops and margin 1–3 mm, tertiary veins raised above, percurrent to reticulate. Flowers solitary in axils of leaves; pedicels 5–12 mm long, c. 2 mm diam, fruiting pedicels 12–20 mm long, 4–5 mm diam, densely covered with appressed, brown hairs, articulated at 0.5–0.8 from the base, bracts c. 6, very broadly ovate, to c. 4 mm long; flower buds ovoid; sepals free, broadly ovate-triangular, 7–10 by 6–8 mm, appressed, outer side densely covered with appressed, brown hairs; petals greenish yellow or yellow in vivo, ovate to oblong-ovate, 15–27 by 10–15 mm, outer side densely covered with appressed, brown hairs; stamens 1.5–2 mm long, connective shield hairy. Monocarps 15– 25, green in vivo, brown in sicco, ellipsoid, 19–30 by 10–15 mm, densely covered with appressed, brown hairs, apex rounded, wall 1–3 mm thick, stipes 3–8 by 3–5 mm. Seed ellipsoid, 16– 20 by 8–9 mm, dark brown, longitudinally and transversely grooved, raphe not distinct from rest of seed.

Distribution — Amazonian Colombia (Amazonas), Brazil (Amapá, Amazonas).

Habitat & Ecology — In non-inundated forest, on clayey to sandy soil, one collection from caatinga on white, sandy soil. At elevations below 200 m. Flowering: January, December; fruiting: November.

Vernacular names — Colombia: Buruchicú (Muinane name) (Londoño et al. 1444), Butruchicu (Muinane name) (Murillo A. & Rodríguez A. 538), Kïyïmeko (Miraña name), Palo de buho (Londoño et al. 1444).

Note — Guatteria trichocarpa can be recognized by a dense indument of appressed to erect, brown hairs on most parts of the plant. Furthermore, it is characterized by large, thick-walled monocarps, with short stipes up to 5 mm diam. The elongation of the fruiting pedicel is caused by growth of the part below the articulation, rather than growth of the upper part as is most commonly seen in other species of Guatteria .