Guatteria rotundata Maas & Setten — Plate, 1988

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 : 145-147

137. Guatteria rotundata Maas & Setten — Plate 7a; Map 29

Guatteria rotundata Maas & Setten (1988) 255, f. 11. — Type: Nee & Tyson 10999 (holo MO; iso EAP, H, NY, RB, U, XAL), Panama, Panamá, Chepo, El Llano-Carti road, 16–18.5 km by road N of Pan American Highway , 400–450 m, 28 Mar. 1973.

Tree 5–30 m tall, 20–40 cm diam; young twigs sparsely cov- ered with appressed hairs, soon glabrous. Leaves: petiole 2–10 mm long, 1–2 mm diam; lamina obovate to obovate-elliptic, 5–14 by 2–6 cm (leaf index 2–2.8), coriaceous, rather densely to sparsely verruculose on both sides, dull, dark brown above, brown below, glabrous above, rather densely to sparsely covered with appressed hairs below, base acute, extreme base attenuate, decurrent along petiole, apex rounded to obtuse, the extreme tip shortly acuminate (acumen 1–5 mm long) or not protruding, primary vein flat above, keeled below, secondary veins distinct, 7–12 on either side of primary vein, raised above, smallest distance between loops and margin 2–3 mm, tertiary veins raised above, reticulate. Flowers solitary in axils of leaves; flowering and fruiting pedicels 4–15 mm long, 1–2 mm diam, rather densely covered with appressed hairs, articulated at 0.2–0.5 from the base, bracts 4–5, soon falling, not seen; flower buds depressed ovoid; sepals basally connate, broadly ovate-triangular, 3–6 by 4–6 mm, appressed, finally reflexed, outer side rather densely covered with appressed hairs; pet- als green or yellow in vivo, ovate-elliptic to rhombic, 10–17 by 4–12 mm, outer side rather densely to sparsely covered with appressed or erect and curly hairs; stamens 1–2 mm long, connective shield papillate. Monocarps 10– 25, green in vivo, black in sicco, narrowly ellipsoid, 13–16{–18} by 4–{5–6} mm, glabrous, apex apiculate (apiculum <0.5 mm long), wall c. 0.1 mm thick, stipes 1–4 by c. 1 mm. S eed narrowly ellipsoid, 13–16 by 4–5 mm, pale brown, rugulose.

Distribution — Panama.

Habitat & Ecology — In forest. At elevations of 0– 500 m. Flowering: February, April, November; fruiting; February.

Vernacular names — Not recorded.

Note — Guatteria rotundata is unique by its leaves, the apex of which is mostly distinctly rounded.

Figures

Plate 7 a. Guatteria rotundata Maas & Setten. Fruiting branch, flower (insert). – b. Guatteria rupestris R.E.Fr. Fruiting branch. – c. Guatteria scandens Ducke. Fruit on stem of liana. – d–f. Guatteria schomburgkiana Mart. d. Branch with mature flower; e, f. young flower and fruit. – g. Guatteria sellowiana Schltdl. Part of flowering branch. – h. Guatteria sessilicarpa Maas & Setten. Fruiting branch (a: Ratón, Panama; b: Simonis & Cordeiro CFCR 4116; c: Maas et al. 3600; d, e: Mabura, Guyana 1988; f: Maas et al. 7149; g: Maas et al. 9842; h: Cerro Jefe, Panama. — Photos: a: J. Carrion; b: J.E. Simonis; c–f: L.Y.T. Westra; g: P.J.M. Maas; h: J. Harrison.