Guatteria alata Maas & Setten — Plate

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 : 26

4. Guatteria alata Maas & Setten — Plate 1c; Map 3

Guatteria alata Maas & Setten (1988) 250, f. 8, 9. — Type: Alverson et al. 1955 (holo WIS 2 sheets; iso CR), Panama, Coclé,Alto Calvario, 0.5–2 km N of Rivera saw mill, on summit and Caribean slope of continental divide, 7 km N by air of El Copé, 700–900 m, 27 Oct. 1982.

Tree 5–30 m tall, c. 20 cm diam; young twigs with sharp wings decurrent from petioles, sparsely to rather densely covered with appressed, brown hairs, soon glabrous. Leaves: petiole 10–15 mm long, 5–7 mm diam; lamina obovate to elliptic, 18–34 by 10–16 cm (leaf index 1.9–2.5), coriaceous, rather densely to densely verruculose, dull, brown to green above, brown below, sparsely covered with appressed hairs to glabrous above, sparsely covered with appressed hairs to glabrous below, base acute to obtuse, decurrent as wings along petiole, apex shortly acuminate (acumen 1–5 mm long), primary vein impressed above, secondary veins distinct, 17–20 on either side of primary vein, flat to raised above, smallest distance between loops and margin 1–3 mm, tertiary veins inconspicuous, flat to slightly raised above, reticulate to percurrent. Flowers solitary on leafless branchlets; pedicels 12–33 mm long, c. 2 mm diam, fruiting pedicels 3–5 mm diam, densely covered with appressed, pale brown hairs, articulated at c. 0.2 from the base, bracts 7–8, soon falling, not seen; flower buds depressed ovoid; sepals free, broadly ovate, 10–13 by 9–10 mm, appressed, outer side densely covered with appressed, pale brown hairs; petals yellow in vivo, broadly ovate, 13–15 by 10–13 mm, outer side densely covered with appressed hairs; stamens 1.5–2 mm long, connective shield papillate. Monocarps 6 –20, green to purple in vivo, black in sicco, ellipsoid, 18–24 by 12–15 mm, sparsely covered with appressed, brown hairs, soon glabrous, apex rounded to apiculate (apiculum <1 mm long), wall 1–2 mm thick, stipes 4–22(–30) by 1–3 mm. Seed ellipsoid to ovoid, 15–19 by 7–8 mm, brown, rugulose, raphe not distinct from rest of seed.

Map 3 Distribution of Guatteria alata (●), G. alba (£), G. alta (■), G. alticola (P), G. amapaensis (u) and G. anteridifera (✸).

Distribution — Costa Rica, Panama.

Habitat & Ecology — In forest. At elevations of 200– 900 m. Flowering: February, October; fruiting: January, February, October.

Vernacular names — Not recorded.

Field observations — Fruit eaten by the bird Penelope purpurascens (‘Pava crestada’) (L. Martínez et al.1038, Panama).

Note — Guatteria alata is unique by strongly winged young twigs and broad and obovate to elliptic, shortly acuminate leaves.

Figures

Plate 1 a, b. Guatteria aeruginosa Standl. a. Flowering branch; b. flower and fruit. – c. Guatteria alata Maas & Setten. Part of twig. – d. Guatteria allenii R.E.Fr. Flowers. – e–g. Guatteria alta R.E.Fr. e. Flowering branch; f. flower; g. fruit. – h. Guatteria australis A.St.-Hil. Ripe flower (a: Chatrou et al. 720; b: Chatrou et al. 741; c: McPherson 20133; d: Maas et al. 9543; e–g: Gal Tadri 560; h: Maas et al. 8816). — Photos: a, b: L.W. Chatrou; c: G. Mc Pherson; d: P.J.M. Maas; e–g: Gal Tadri; h. P.J.M. Maas.