Oxandra krukoffii R.E.Fr.
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publication ID |
https://doi.org/10.3767/000651916X694283 |
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persistent identifier |
https://treatment.plazi.org/id/038A142D-6436-B249-264C-FC1CB3FBFD97 |
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treatment provided by |
Felipe |
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scientific name |
Oxandra krukoffii R.E.Fr. |
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7. Oxandra krukoffii R.E.Fr. View in CoL — Fig. 4c View Fig , 7 View Fig ; Map 3 View Map 3
Oxandra krukoffii R.E.Fr. (1934) 199. — Type: Krukoff 1124 (holo S; iso B, BM, G, K, NY, P), Brazil, Pará , Upper Cupary River , plateau between the Xingu and Tapajós Rivers, 14 Sept. 1931.
Tree or shrub 3–15 m tall, 5–25 cm diam; young twigs rather densely covered with appressed hairs, soon glabrous. Leaves: petiole 2–5 mm long, 1–2 mm diam; lamina narrowly elliptic to narrowly ovate, 10–20 by 4–7 cm (leaf index 2.4–3.1), chartaceous, sparsely to rather densely verruculose above, or not verruculose, shiny and greyish green above, greyish green to brownish below, glabrous above, sparsely covered with appressed hairs below, soon glabrous, base obtuse, apex acuminate (acumen 10–15 mm long), primary vein raised above, secondary veins distinct, 10–13 on either side of primary vein, raised above, but often seemingly impressed due to the laminar tissue bulging upward, angle of secondary veins with primary vein 45–80°, united into a marginal vein, smallest distance between marginal vein and margin 5–7 mm, tertiary veins slightly raised above, reticulate. Flowers in 1–3-flow- ered inflorescences, mostly produced from leafless branches; pedicels 2–5 mm long, 1–1.5 mm diam, fruiting pedicels 3–7 mm long, 1–2 mm diam, densely to sparsely covered with appressed hairs to glabrous;bracts 4–5, depressed ovate, 1–3 mm long, outer side densely to rather densely covered with appressed hairs; flower buds ellipsoid to globose; sepals broadly to shallowly ovate-triangular, 2–3 by 2–3 mm, outer side densely to rather densely covered with appressed hairs; petals cream to white in vivo, obovate, linear, or elliptic, 8–11 by 3–6 mm, outer side rather densely covered with appressed hairs; stamens c. 25, 3–4 mm long, apex of connective narrowly triangular; carpels ≤ 10. Monocarps 1–6, green, maturing red to black in vivo, black, sometimes brown in sicco, ellipsoid, 10–16 by 6–11 mm, glabrous, apex rounded, wall 0.2–0.5 mm thick, stipes 0.5–1 by 1–2 mm. Seed ellipsoid, 10–15 by 6 –11 mm, pale brown, surface transversely striate, spiniform or composed of flattened pegs.
Distribution — Suriname, Peru (Loreto), Brazil (Pará and adjacent Amazonas).
Habitat & Ecology — In non-inundated forest, on sandy or clayey soil. At elevations of 0– 325 m. Flowering: August, September, November; fruiting: November to March.
Fig. 9 Oxandra laurifolia (Sw.) A.Rich. Flowering twig (Sintenis 4313, U).
Vernacular names — Brazil: Envira-preta (Krukoff 1124, N.T. Silva 1627), Envireira-forte (Capucho 558), Pinda’ywa (T.R. Bahia 2324, 2333, 2387, 2395, 2403, 2419, 2453, 2464, 2467), Taiassuba (Costa 53).
Uses — Comestible for curassows (fruit), fuel stuff (wood), tie stuff (bark fibers), element for house post (wood) (T.R. Bahia 2324, 2333, 2387, 2395, 2403, 2419, 2453, 2464, 2467, Brazil); ceilings and firewood (Capucho 558, Brazil); bark has a caustic material (Krukoff 1124, Brazil).
Note — Oxandra krukoffii superficially resembles O. euneura by its marginal vein and raised primary vein, but it strongly differs by its rounded instead of pointed fruits, which are much smaller (10–16 mm vs 10–30 mm). Moreover, the distance from the marginal vein to the leaf margin is somewhat larger (5–7 mm in O. krukoffii vs 3–5 mm in O. euneura ). Oxandra krukoffii is almost always ramiflorous!
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