Guatteria eugeniifolia A.DC. ex R.E.Fr.

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 : 81-83

63. Guatteria eugeniifolia A.DC. ex R.E.Fr. — Map 14

Guatteria eugeniifolia A.DC. ex R.E.Fr. (1938) 714; (1939) 453. — Type: Poeppig 1859 (holo G; iso B, BR, F, G, P 2 sheets, W), Peru, San Martín , Tocache Nuevo (‘ Loreto, Tocache, Maynas’ ), June 1831 .

Tree to c. 20 m tall, to c. 40 cm diam; young twigs densely cov- ered with appressed to more or less erect, curly or not, brown hairs to glabrous, becoming glabrous all over. Leaves: petiole 3–10 mm long, 1–2 mm diam; lamina narrowly elliptic, 8–20 by 3–7 cm (leaf index 2.5–3), chartaceous to coriaceous, rather densely to sparsely verruculose, shiny, greyish brown or dark brown above, brown below, glabrous or with some scattered, appressed hairs above, sparsely covered with appressed hairs to c. 1 mm long to glabrous below, base acute to obtuse, the extreme base slightly attenuate, apex acuminate (acumen 5–10 mm long), primary vein flat to impressed above, secondary veins distinct to indistinct, 8–15 on either side of primary vein, raised above, smallest distance between loops and margin 2–4 mm, tertiary veins raised above, reticulate. Flowers in 1–2-flowered inflorescences in axils of leaves or paniculately grouped at the end of a twig by reduction of leaves to bracts; flowering pedicels 12–15 mm long, c. 1 mm diam, fruiting pedicels to c. 25 mm long, 1–2 mm diam, densely covered with erect to more or less appressed, curly, brown hairs to glabrous, articulated at 0.2–0.4 from the base, bracts 5–6, soon falling, not seen; flower buds not seen; sepals free, broadly ovate-trian- gular, 4–5 by 4–5 mm, appressed to spreading, outer side densely covered with erect, curly, brown hairs; petals colour not recorded, ovate to elliptic, 12–17 by 5–7 mm, outer side densely covered with erect, curly, brown hairs; stamens c. 1 mm long, connective shield papillate, umbonate. Monocarps 10–75, yellowish green when young in vivo, brown in sicco, ellipsoid, 10–13 by 8–11 mm, sparsely covered with appressed hairs to glabrous, apex rounded to apiculate (apiculum <0.5 mm long), wall 1–1.5 mm thick, stipes 5–7 by 1–1.5 mm. Seed ellipsoid, 10–11 by 6–7 mm, shiny brown, smooth to slightly pitted.

Distribution — Amazonian Peru (San Martín ).

Habitat & Ecology — In non-inundated forest.At an elevation of 400– 500 m. Flowering: June; fruiting: June, November.

Vernacular names — Not recorded.

Note — The taxonomic position of G. eugeniifolia , only known from two collections from the Peruvian type locality, needs to be investigated further. The verruculose leaves could possibly point to sect. Mecocarpus (Maas & Westra 2011). However, the raised secondary and tertiary venation on the upper side of the leaves and the smooth to slightly pitted (rather than much more sculptured) seeds do not fit at all in this section making a place within that section unlikely. Fries (1939) placed G. eugeniifolia in sect. Tylodiscus, based on the umbonate staminal shield, setting it apart in that section because of the lack of a sharply delimited glabrous area at the inner base of the inner petals.