Guatteria griseifolia Maas & Westra

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 : 92

76. Guatteria griseifolia Maas & Westra — Map 17

Guatteria griseifolia Maas & Westra (2011) 127, f. 8b, c, 10. — Type: Gentry et al. 30941 (holo U 2 sheets; iso MO), Ecuador, Morona-Santiago, Cam- pamento La Playa, road construction camp 23 km SE of San Juan Bosco , 1050 m, 28 Jan. 1981.

Guatteria sp. 4 Chatrou et al. (1997) 110.

Tree 4–20 m tall, c. 10 cm diam; young twigs rather densely to sparsely covered with appressed hairs, soon glabrous, often with narrow wings, initiating below leaf insertion. Leaves: petiole 5–10 mm long, 4–5 mm diam; lamina narrowly obovate to narrowly elliptic, 18–35 by 6–13 cm (leaf index 2–3), charta- ceous, sparsely verruculose, slightly to distinctly shiny, greyish green above, greenish brown below, glabrous above, sparsely covered with appressed hairs below, base acute, sometimes obtuse, apex obtuse to rounded, or acuminate (acumen to c. 15 mm long), primary vein impressed to slightly raised at the base above, often keeled below, secondary veins distinct, 12–17 on either side of primary vein, raised above, smallest distance between loops and margin 3–5 mm, tertiary veins slightly raised above, reticulate. Flowers in 1–2(–several)-flowered inflorescences in axils of leaves or on leafless branchlets; pedi- cels 20–30 mm long, 2–3 mm diam, fruiting pedicels 20–50 mm long, 2–3 mm diam, rather densely to sparsely covered with appressed hairs, articulated at 0.1–0.2 from the base, bracts 5– 6, soon falling, the uppermost bract broadly elliptic, to c. 7 mm long; flower buds broadly ovoid; sepals free, broadly ovate-triangular, 8–9 by 7–8 mm, appressed, outer side densely covered with appressed hairs; petals greenish yellow or brownish yellow in vivo, ovate to broadly ovate, 13–20 by 10–12 mm, outer side densely covered with appressed hairs; stamens 2–2.5 mm long, connective shield papillate. Monocarps 50–100, white or green, maturing dark purple to black in vivo, black in sicco, ellipsoid, 10–17 by 5–6 mm, sparsely covered with appressed hairs, soon glabrous, apex apiculate (apiculum <0.5 mm long), wall 0.1–0.2 mm thick, stipes 1–3 by c. 1 mm. Seed ellipsoid, 10–15 by 4–7 mm, shiny brown, rugose, raphe raised.

Distribution — Amazonian Ecuador (Morona-Santiago, Zamora-Chinchipe), Peru (San Martín ).

Habitat & Ecology — In non-inundated forest (cloud for- est with abundant epiphytes, ‘bosque perennifolia’, forest on limestone-derived soil, locally with thick humous layer). At el- evations of 900–2400 m. Flowering: January, July, November, December; fruiting: March, June, October to December.

Vernacular names — Not recorded.

Note — Guatteria griseifolia occurs at quite high elevations in Ecuador and Peru. It can be distinguished by the often winged young twigs, greyish green leaves, a leaf apex varying from obtuse, rounded to acuminate, and an often keeled midrib.