Guatteria friesiana (W.A.Rodrigues) 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 : 87-89

70. Guatteria friesiana (W.A.Rodrigues) Erkens & Maas — Map 16

Guatteria friesiana (W.A.Rodrigues) Erkens & Maas (2008) 404; Maas & Westra (2011) 123,f. 8a,9,pl.1c. — Guatteriopsis friesiana W.A. Rodrigues (1981) 49, f. 1; Maas et al. (2007) 644. — Type: D.F. Coêlho INPA 3609 (holo INPA; iso S), Brazil, Amazonas, Manaus, Igarapé do Passarinho, 14 Mar. 1956.

Tree 3–10 m tall, 4–10 cm diam; young twigs and petioles densely covered with a velutinous indument of erect, dark brown to blackish brown, long-persistent hairs to c. 0.5 mm long. Leaves: petiole 2–8 mm long, 2–3 mm diam; lamina nar- rowly elliptic to narrowly obovate, 12–28 by 4–9 cm (leaf index 2.7–3.5), chartaceous to thinly coriaceous, scabridulous, pale green to greyish green on both sides, glabrous above, sparsely covered with appressed brown hairs below, but rather densely to sparsely covered on primary vein, base cordate, apex acuminate (acumen 10–20 mm long), primary vein flat or almost so above, secondary veins indistinct, 10–24 on either side, flat or slightly impressed above, indistinctly loop-forming over most of the length or the entire length, smallest distance between loops and margin 2 – 5 mm, tertiary veins inconspicuous and hardly visible, reticulate. Flowers in 1–2-flowered inflorescences in axils of leaves; flowering and fruiting pedicels 5–10 mm long, 2–3 mm diam, densely covered with dark brown, appressed hairs, articulated at 0.3–0.5 from the base, bracts c. 5, soon falling, the upper bract broadly to depressed ovate, c. 5 mm long; flower buds ovoid to conical, acute; sepals free, triangular to ovate-triangular, 10–16 by 6–7 mm, appressed, soon be- coming spreading to reflexed, outer side densely covered with dark brown, appressed hairs; petals cream in vivo, unequal, narrowly ovate-triangular to narrowly oblong-ovate, outer ones 20–25 by 8–12 mm, inner ones 15–19 by 6–8 mm, outer side densely covered with dark brown, appressed hairs; stamens c. 2 mm long, connective shield hairy. Monocarps 7–10, green, maturing red in vivo, brown in sicco, ellipsoid, 19–23 by 6–7 mm, sparsely covered with appressed and erect hairs, apex apiculate (apiculum c. 2 mm long), wall 0.1–0.2 mm thick, stipes 1–3 by 2 mm. Seed ellipsoid, 13–19 by 6–8 mm, dark, shiny brown, slightly transversally grooved, slightly pointed at the apex, raphe strongly impressed.

Distribution — Amazonian Brazil (Amazonas).

Habitat & Ecology — In non-inundated forest, on clayey to sandy soil. At elevations of 50–125 m. Flowering: February to May; fruiting: March to June.

Vernacular name — Brazil: Envireira (Rodrigues & Loureiro 5908).

Note — Guatteria friesiana can be recognized by a cordate leaf base, obscure secondary veins, a velutinous indument on young twigs, and shortly pedicellate flowers.