Monographs Details: Ryania dentata var. dentata
Description:Variety Description - Shrub or tree up to 10.0 m tall. Branchlets more or less densely grayish-pubescent, with sometimes simple but usually stellate hairs, the rays ascending or erect. Leaves ovate to ovate-lanceolate or elliptic-oblong, apex short-acuminate, acute, base broadly attenuate, rounded or subcordate, membranaceous to subcoriaceous, dull and hirtellous along midrib, otherwise glabrous above, rather sparsely grayish-pubescent along nerves beneath, glabrescent, margin entire or faintly dentate-serrate, (5.0-)6.0-12.0 cm long, (2.0-)3.0-5.0 cm broad, lateral nerves 6-7 pairs prominent on both faces though mainly beneath, reticulation slightly raised; petiole pubescent like the branchlets, 3.0-4.0 mm long; stipules subulate, gray-puberulous or -hispidulous, ca 3.0 mm long. Inflorescence 1- or 2-flowered; pedicels grayish-rusty-tomentose (hairs partly ascending or erect), 1.0-1.7 cm long, articulate a little above base. Sepals persistent, rusty-tomentose, whitish outside, yellowish within, 2.8-3.2 cm long, 0.5-0.8 cm broad. Anthers linear, shortly mucronate at apex, 3.8-4.5 mm long. Disk low (1.5 mm). Ovary (sub)sessile. Fruit obovoid, rusty-tomentose, (1.0-) 1.5 cm diam, dehiscing with 4-6 valves; endocarp thin; seeds subglobose, hispidulous.
Distribution and Ecology - Venezuela, confined to the Upper Orinoco (Atures-Maypurés) area; in forest shade or clearings, gallery forest, also secondary forest, in rocky or sandy places, up to 100 m altitude, apparently rather rare.
Discussion:Ryania dentata is closely related to and sometimes approaches Ryania angustifolia. Transitional forms of these species are found particularly where their areas of distribution coincide.
Distribution:Venezuela South America
| Apure Venezuela South America
| Amazonas Venezuela South America