Monographs Details: Odontocarya tenacissima Diels
Authority: Mori, S. A. 1987. The Lecythidaceae of a lowland Neotropical Forest: La Fumée mountain, French Guiana. Mem. New York Bot. Gard. 44: 1-190.
Family:Menispermaceae
Description:Species Description - Glabrous vines up to 9 m long, with smooth, reddish-brown trunk up to 1 cm diam, the branches and branchlets lenticellate; petioles slender, 1.5-2.5(-3) cm long, twisted at base, little thickened either end; leaf-blade chartaceous, lustrous above, paler beneath, ovate to elliptic-ovate, 4.5-7.5 cm long, (2.5-)3-5 cm wide, rounded to broadly cuneate at base, at insertion of petiole minutely emarginate, shortly acuminate at apex, the acumen 3-6 mm long, 2-3 mm wide, emarginate at tip; primary venation palmately 3-plinerved, the pallid, yellowish nerves subimmersed above, strongly prominent beneath, the costa giving rise at and beyond middle to 1-2 pairs of secondaries, the tertiary nerves and reticulum slightly raised above, sharply prominent beneath, the ultimate defined areoles there <1 mm diam; inflorescence and flower [male] unknown; inflorescence [female] simply racemose, up to 20-flowered, the pendulous axis 15-30 cm long, the pedicels in fruit 7-15 mm long, ±0.8 mm diam; flower [female]: sepals membranous, the 3 outer deflate, obtuse, ±1 mm long, the inner broadly ovate, obtuse, 3.5 mm long, 2.6 mm wide, ± 7-nerved; petals 6, ovate, obtuse, 2.7-3 mm long, 1.5-2 mm wide, carnose, involute-boat-shaped; staminodes 6, ±1 mm long; drupe oblong-ellipsoid, ±17 mm long, 10 mm diam, green (acc. collector) but probably yellowing when ripe, the pulp deciduous, the endocarp 15 mm long, 8.5 mm wide, charged on the back with several sinuous, low, blunt ridges but not at all echinate or papillose, the condylar aperture narrowly elliptic, 7 mm long, 2 mm wide.

Discussion:Type. “Colombia: Dep. Antioquia: Medellin, cir. 1500 m ([female] flor. et fruct. Februar 1931- W. A. Archer n. 1618 . . .)” (holotype, presumably formerly at B and now destroyed; isotype 12 sheets] US!). Until the staminate plant of O. tenacissima is secured the close relationship of the species will remain doubtful. Because of the small size and close reticulation of the leaf-blades it is likely to be compared either with O. emarginata or O. mallosperma, both of which differ in their relatively short fruiting pedicels (2-4 not 7-15 mm long). The petioles of O. emarginata are much longer (4-6 not 1.5-3 cm), while the raceme axis of O. mallosperma is much shorter (6-12 not 15-30 cm). The great length of the pistillate inflorescence suggests that the staminate one of O. tenacissima will be bis-racemose, but this is a pure conjecture. The pistillate flower is, for the genus, on the large side.