Manihot jacobinensis 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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Type
TYPE. Blanchet 2553: Brasil, Bahia: Serra da Jacobina, 1836 (syntypes, BM, F-3, G-3, K, NY, P-2, W-2).
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Synonyms
Manihot occidentalis Müll.Arg., Manihot rigidifolia Pax & K.Hoffm.
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Description
Description - Shrubs. Stems glabrous. Leaves alternate; stipules caducous; petioles ca 6.0 cm long, terete, glabrous, petiole attachment to lamina basal, nonpeltate; lamina coriaceous, adaxial surface dark green, abaxial surface with a light bloom, abaxial surface wax pattern spongiose; venation camptodromous, veins glabrous; lamina 3 lobed, lobes prominently overlapping at sinus; median lobes ovate to almost rotundate, ca 5.0 cm long, ca 4.0 cm wide, apex broadly acute, base of lobes constricted ca 0.5 cm wide, lowest lobes more or less similar to median lobes in outline and size. Inflorescence a monoecious, terminal raceme, ca 12.0 cm long, held erect, all parts glabrous, with light bloom on peduncles, pedicels, tepals, etc; bracteoles foliaceous, 1.5 cm long, 0.8 cm wide; bractlets foliaceous, 1.0 cm long, 0.4 cm wide. Pistillate flowers restricted to the base of the upper 2/3 of the inflorescence, tepal 1.0 cm long, cleft to base into 5 lobes, ovary subglobose, glabrous. Staminate buds slightly bifusiform; flowers medium sized, tepal 1.0 cm long, cleft 1/3 way down into 5 lobes, stamens 10, in 2 whorls of 5 each. Fruits and seeds non vidi.
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Discussion
The specimen collected by Maguire et al (56464, NY) fits the descriptions and type of Manihot jacobinensis in its major features, but differs in that the bracts are setaceous, while those of jacobinensis are foliaceous. However, species of section Quinquelobae to which jacobinensis clearly belongs are quite variable in this character, and the possibility of genetic recombination must not be ruled out. Quite possibly, the Maguire specimen represents a distinct taxon, but we feel that this single collection does not give sufficient basis for such designation. Therefore, we maintain Maguire et al 56464 as a variation within the M. jacobinensis complex.
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Distribution
(Fig 58B). Brasil, states of Mato Grosso and Bahia. Alt ca 1000 m.
Brazil South America| Mato Grosso Brazil South America| Bahia Brazil South America|