Couratari oligantha A.C.Sm.

  • Authority

    Mori, S. A. & Prance, Ghillean T. 1990. Lecythidaceae - Part II: The zygomorphic-flowered New World genera (Couroupita, Corythophora, Bertholletia, Couratari, Eschweilera, & Lecythis). With a study of secondary xylem of Neotropical Lecythidaceae by Carl de Zeeuw. Fl. Neotrop. Monogr. 21: 1-376. (Published by NYBG Press)

  • Family

    Lecythidaceae

  • Scientific Name

    Couratari oligantha A.C.Sm.

  • Type

    Type. Brazil. Amazonas: Upper Rio Negro, 1907-1908 (fl), Weiss & Schmidt 1 (holotype, NY; isotype, NY).

  • Description

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    Description - Trees, to 30 m tall, the trunk without buttresses, the young branches glabrous or sparsely puberulous-glabrescent. Leaf blades oblong to oblong-lanceolate, 4.5-11 x 1.6-4.3 cm, chartaceous, glabrous on both surfaces; midrib prominulous above, prominent and entirely glabrous beneath; secondary veins 9-11 pairs, prominulous, the tertiary venation distinctly prominulous; apex acuminate, the acumen 3-12 mm long; base cuneate to subcuneate; margins entire, slightly undulate; petiole 5-11 mm long, glabrous, slightly canaliculate, not winged. Inflorescences terminal or axillary, racemose, the rachis puberulous; bracts oblong, ca. 7 mm long, membranous, caducous, glabrous except for ciliate margins; pedicels 1.5-3 cm long, puberulous. Flowers often when leafless; hypanthium campanulate, ca. 5 mm long; calyx lobes rounded, puberulous on exterior, with ciliate margins; petals oblong-spathulate, 2.5-3.8 cm long, sparsely puberulous on exterior, glabrous within, intermittently ciliate on margins, rose-pink; androecium ca. 3.5 cm long, the staminal ring ca. 9 mm diam., the exterior of hood glabrous, rugulose, the stamens 45-50, inserted in more than one row around staminal ring and extending well up interior of ligule. Fruits broadly campanulate, 3-4.5 (excluding stipe) x 3.5-4.5 cm, with thin stipe 1.8-2.5 cm long, longitudinally striate on exterior of pericarp, smooth not crustaceous on exterior, thin coriaceous, ca. 0.5-1 mm thick, the calycine ring 4-8 mm below the apex, plane, not ridged; operculum convex, radially grooved, the columella markedly triangular. Seeds oblong, symmetrical, 3-3.5 x 1.3-1.6 cm.

  • Discussion

    See notes under sect. Microcarpa for the relationships of this species.

  • Distribution

    Grows on high river banks, usually above the flood level, in Guyana and Amazonia. Collected in flower from Aug to Jan in Amazonia, Mar to Jun in Guyana.

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