Manihot tristis Müll.Arg.
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Authority
Rogers, David J. & Appan, S. G. 1973. Manibot, Manihotoides (Euphorbiaceae). Fl. Neotrop. Monogr. 13: 1-272. 1 chart. (Published by NYBG Press)
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Family
Euphorbiaceae
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Scientific Name
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Description
Description - Shrubs, to 3.0 m tall. Young stems pubescent or glabrous; mature stem glabrous. Leaves alternate; stipules persistent or caducous, margin serrate; petioles 4.0-9.0 cm long, glabrous or pubescent; lamina palmately 3“5 lobed, glabrous or pubescent, abaxial surface wax pattern reticulate; venation camptodromous, median lobes obovate, usually 5.0-10.0 cm long, occasionally longer, ca 2.5 cm wide, apex acute, base of lobe narrow (less than 0.5 cm) to wide (more than 0.5 cm). Inflorescence a monoecious panicle, less than 8.0 cm long; bracteoles and bractlets setaceous. Pistillate flowers restricted to the base of the panicle, pedicel ca 2.0 cm long, tepal 0.6 cm long, deeply cleft into 5 lobes, ovary subglobose. Staminate buds ovoid-ellipsoid, 0.5 cm long, cleft ca 1/3 way down into 5 lobes, stamens 10, in 2 whorls of 5 each.
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Discussion
The "skyline" (Fig 28) indicates that the plants here related as subspecies should be kept distinct. It is at this point, however, that the taxonomist’s judgment must be exercised, and in this example, we overruled the computer-made relationship. Actual reexamination of the specimens, and the geographic distribution (Fig 31C) indicated the relationship here given.
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Distribution
(Fig* 31C). Venezuela, Amazonas Territory; Suriname; Brasil, Amapa and Roraima Territories. One subspecies, M. tristis subsp saxicola, is found on granitic domes, and in this respect, is similar to M. leptopoda, (species No. 28) which grows on granitic outcrops in the Rio de Janeiro region.
Venezuela South America| Amazonas Venezuela South America| Suriname South America| Brazil South America| Amapá Brazil South America| Roraima Brazil South America|