Tetrameranthus pachycarpus
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Genus: Tetrameranthus
Name
Tetrameranthus pachycarpus Westra – Wikispecies link – Pensoft Profile
- Tetrameranthus pachycarpusProceedings of the Koninklijke Nederlandse Akademie van Wetenschappen, ser. C. 88: 477, plate 2, fig.1, plates 12 & 13. 1985.
Type
Klug 1216 (holotype NY; isotypes F, U), Peru, Loreto: Mishuyacu, near Iquitos, 100 m, April 1930.
Description
Tree, 4–26 m tall, young twigs and petioles densely to rather densely covered with brown, stellate hairs >0.5 mm long, becoming glabrous. Leaves: petioles 20–30 mm long, 2–4 mm diam., slightly thickened toward the base, lamina elliptic, narrowly elliptic or narrowly obovate, 17–22 by 5–10 cm (index 2.1–3.4), coriaceous, brown in sicco, glabrous except for primary vein above, rather densely to sparsely covered with stellate hairs on large veins and otherwise sparsely covered with stellate hairs to glabrous below, base acute to attenuate, apex obtuse, acute, or acuminate (acumen 1–5 (rarely more) mm long), primary vein impressed to almost flat above, secondary veins 10–15 on either side of primary vein, not loop-forming, or less often loop-forming, shortest distance between loops and margin 2–3 mm, tertiary veins flat and inconspicuous above, percurrent to more or less reticulate. Inflorescences 1-flowered; peduncles 4–5 mm long, 1–2 mm diam., fruiting peduncles to c. 5 mm diam., bracts 2(–more?), narrowly triangular to linear-triangular, 3–5 mm long, outer side densely covered with stellate hairs, falling at or after flowering, pedicels 10–15 mm long, 1.5–2 mm diam., fruiting pedicels to c. 25 mm long, 3–4 mm diam., peduncles and pedicels densely to rather densely covered with stellate hairs, becoming glabrous; flowers yellow in vivo; sepals broadly elliptic, 3–4 mm long, connate at the very base, outer side densely covered with stellate hairs; outer petals narrowly elliptic to oblong, to c. 35 by 16 mm, outer side densely to rather densely covered with stellate hairs, the inner base glabrous, to c. 3 mm long, inner petals narrowly elliptic to oblong, somewhat smaller than outer petals and with slightly larger glabrous inner base; stamens c. 2 mm long, connective shield more or less conical and curved toward the center. Monocarps 1–3, yellow in vivo, brown in sicco, ellipsoid, 2-seeded forms to c. 70 by 40 mm, without or with inconspicuous, oblique constriction, apex rounded. Seeds 1–2 per monocarp, 30–40 by 20–28 mm.
Distribution
Peru (Loreto), fairly common in the region around Iquitos, not known elsewhere so far.
Habitat and ecology
In forest on white sand. At elevations of 100–200 m. Flowering and fruiting: probably throughout most of the year.
Additional specimens examined
Peru. Loreto: Mishana, 100–140 m, Ayala 1564 (AMAZ), Díaz S. et al. 404 (MO), Foster 4271 (F, MO, U), Gentry et al. 39313 (U), Vásquez et al. 5285 (MO, U), Vásquez & Jaramillo 9651 (MO, U); Puerto Almendras, 100–120 m, Díaz & Arévalo 81 (MO, U), Grández & Jaramillo 4983 (MO, U), Vásquez & Jaramillo 4619 (MO, U), 11031 (MO, U), Vásquez et al. 8067 (MO, U); Carretera de Peña Negra, at 2 km from Quista Cocha, 180 m, Rimachi Y. 4537 (MO, US), 7735 (MO, NA); Ninarumi (“Nina Rumy”), 123 m, Ruiz M. 808 (MO); Prov. Maynas, Allpahuayo, Vásquez et al. 17984 (MO).
Taxon Treatment
- Westra, L; Maas, P; 2012: Tetrameranthus (Annonaceae) revisited including a new species PhytoKeys, 12: 1-21. doi
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