Guatteria ruboides Maas & Westra, 2015

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 : 147-151

138. Guatteria ruboides Maas & Westra , sp. nov. — Fig. 54h , 67 ; Map 30

Species G. tomentosa affinis sed monocarpiis fere sessilibus differt. — Typus: Vásquez & Jaramillo 8025 (holo U; iso AAU, MO, NY), Peru, Loreto, Prov. Maynas, Puerto Almendras, 122 m, 29 Sept. 1986.

Guatteria trichoclonia Vásquez (1997) 100; Murillo A. & Restrepo (2000) 116, f. 35, not of Diels (1931).

Tree 8–28 m tall, c. 20 cm diam; young twigs densely covered with long-persisting, erect, stiff hairs (‘hirsute’) to c. 3 mm long. Leaves: petiole 2–3 mm long, c. 1 mm diam; lamina narrowly ovate to narrowly elliptic, 8–12 by 2.5–3 cm (leaf index 2.6–4), chartaceous, not verruculose, dull, dark brown to brownish green above, brown below, rather densely covered with long-persisting, erect to appressed, stiff hairs (‘hirsute’) to c. 3 mm long above, densely covered with long-persisting, erect, stiff hairs (‘hirsute’) to c. 3 mm long below, base obtuse, apex acuminate (acumen 5–15 mm long), primary vein flat above, secondary veins indistinct, 10–12 on either side of primary vein, slightly raised above, smallest distance between loops and margin 2–3 mm, tertiary veins raised above, reticulate. Flowers in 1(–2)-flowered inflorescences in axils of leaves or on leafless branchlets; flowering and fruiting pedicels 20–30 mm long, c. 1 mm diam, densely covered with long-persisting, erect, stiff hairs (‘hirsute’) to c. 3 mm long, articulated at 0.1–0.3 from the base, bracts 5 – 6, soon falling or the uppermost often present at flowering time, elliptic or narrowly elliptic, with acuminate apex, to c. 10 mm long; flower buds broadly ovoid, pointed; sepals free, broadly ovate-triangular, 4–6 by 4–5 mm, finally reflexed, apex acuminate, outer side densely covered with long-persisting, erect, stiff hairs (‘hirsute’) to c. 3 mm long; petals green, maturing yellow in vivo, narrowly ovate-triangular, 12–15 by 3–5 mm, outer side densely covered with appressed and erect hairs; stamens c. 1 mm long, connective shield glabrous. Monocarps 10–25, green, maturing yellow in vivo, black in sicco, ellipsoid, 5–12 by 3–6 mm (the ripe ones 10–12 by 5–6 mm, somewhat inflated and winged), rather densely to sparsely covered with erect, stiff hairs (‘hirsute’) to c. 3 mm long, apex rounded, wall 0.1–0.2 mm thick, stipes 0–1 by 0–1 mm. Seed ellipsoid, 5–6 by 3 mm, brown, rugulose, raphe not distinct from rest of seed.

Distribution — Amazonian Colombia (Amazonas) and Peru (Loreto).

Habitat & Ecology — In non-inundated forest, on slightly sandy soil. At elevations of 100– 350 m. Flowering: March to September; fruiting: July to September.

Vernacular name — Peru: Carahuasca ( Vásquez et al. 9363, 10549).

Other specimens examined. COLOMBIA, Amazonas, Corregimiento Puerto Santander, La Chorrera, 14 km SW of Araracuara, 350 m, Cárdenas L. et al. 4195 (COAH, U). – PERU, Loreto, Ninarumi, 100 m, Díaz M. et al. 8 (U); Puerto Almendras (Río Nanay), 122 m, Grández & Jaramillo 2869 (MO, U), Grández et al. 4330 (MO), J. Ruiz 1070 (U), Vásquez et al. 1400, 2612, 8025, 9363, 10549 (MO, U); Ninarumi, Río Nanay, J. Ruiz 1079 (U), Vásquez & Jaramillo 10789 (MO, U); Mishana, Río Nanay, 150 m, Vásquez et al. 7534 (MO, U).

Notes — Guatteria ruboides clearly belongs in sect. Trichoclonia by its indument of persisting, long hairs and pointed flower buds. It is distinct by the sessile monocarps creating a resem- blance to a Rubus fruit, hence the specific name ‘ruboides’. Several specimens from Colombia may belong here, but one of them (Vester 111a) is aberrant in having distinctly stipitate monocarps.

Figures

Fig. 54 a. Guatteria oriximinae Maas & Westra. Fruit. – b. Guatteria pachycarpa Erkens & N.Zamora. Monocarp in cross section. – c, d. Guatteria paludosa R.E.Fr. c. Flowers;d. flower buds and bracts. – e. Guatteria procera R.E.Fr. Fruit. – f. Guatteria revoluta Maas & Westra. Rvolute leaf base, fruit and incomplete flower. – g. Guatteria rigida R.E.Fr. Fruit. – h. Guatteria ruboides Maas & Westra. Fruit (a: Cid et al. 9654, U; b: G. Herrera C. 5227, U; c, d: McDowell et al. 4815, U; e: Sperling et al. 6227, U; f: Vásquez & Jaramillo 8024, isotype U [sheet 2]; g: Anderson et al. 106, U; h: Vásquez & Jaramillo 8025, isotype AAU).

Fig. 67 Guatteria ruboides Maas & Westra. Fruiting branch (Vásquez & Jaramillo 8025, isotype AAU).