Guatteria spectabilis Diels

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 : 163

152. Guatteria spectabilis Diels — Fig. 75 ; Map 32

Guatteria spectabilis Diels (1924) 138; R. E.Fr. (1939) 533,f. 38a,b. — Type: Tessmann 3235 (holo B; iso G, S), Peru, Loreto, Middle Río Ucayali, near Yarinacocha , 155 m, 3 Oct. 1923 .

Tree 12–35 m tall, 15–50 cm diam; young twigs sparsely cov- ered with appressed hairs, very soon glabrous. Leaves: petiole 5–18 mm long, 2–3 mm diam; lamina narrowly elliptic, 15–29 by 6–10 cm (leaf index 2.5–3.3), coriaceous, not verruculose, dull, grey to dark greyish brown above, brown below, glabrous above, sparsely covered with appressed hairs below, base attenuate, decurrent along the petiole to obtuse, apex acuminate (acumen c. 10 mm long), primary vein impressed above, strongly keeled below, secondary veins distinct, 15 –20 on either side of primary vein, slightly raised above, smallest distance between loops and margin 3–4 mm, tertiary veins slightly raised above, reticulate. Flowers in 1–2-flowered inflorescences in axils of leaves; pedicels 15–50 mm long, 1–3{–5} mm diam, rather densely covered with appressed hairs to glabrous, articulated at 0.3–0.5 from the base, bracts 6–8, soon falling, the basal ones not seen, the 2 upper ones ovate-elliptic, to c. 6 mm long; flower buds broadly ovoid; sepals basally connate, triangular to deltate, 8–15 by 9–10 mm, strongly reflexed, margins revo- lute, outer side densely covered with appressed hairs; petals green in vivo when young, maturing creamy green to yellow, ovate-elliptic to broadly obovate, 25–30{–40} by 10–25 mm, outer side densely covered with erect and appressed, brown hairs; stamens 1.5–2 mm long, connective shield papillate. Monocarps and seed not seen.

Distribution — Amazonian Ecuador (Napo, Orellana), Peru (Loreto).

Habitat & Ecology — In periodically inundated (restinga) for- est, flooded by a mixture of black and white water, or in primary non-inundated forest, with Iryanthera hostmannii , Oenocarpus bataua , Iriartea deltoidea , Simarouba amara ( Ecuador), on red soil. At elevations of 110– 260 m. Flowering: August, October, November; fruiting: unknown.

Vernacular name — Peru: Cararasca (Tessmann 3235).

Note — Guatteria spectabilis is highly characteristic by large, reflexed sepals (to 15 mm long!) with recurved margins and large petals up to 40 mm long.

Figures

Fig. 75 Guatteria spectabilis Diels. Flowering branch (Maas et al. 8223, U).