Manihot pruinosa Pohl

  • Authority

    Rogers, David J. & Appan, S. G. 1973. Manibot, Manihotoides (Euphorbiaceae). Fl. Neotrop. Monogr. 13: 1-272. 1 chart. (Published by NYBG Press)

  • Family

    Euphorbiaceae

  • Scientific Name

    Manihot pruinosa Pohl

  • Type

    TYPE. Pohl 1705 (and on some specimens also 2469): Brasil, Goias: ad flumen Rio Claro (syntypes, F, G, K-2, P, W-2).

  • Synonyms

    Jatropha pruinosa Steud., Manihot pruinosa var. pumila Müll.Arg., Manihot burchellii Müll.Arg., Manihot pseudopruinosa Pax & K.Hoffm., Manihot pruinosa Pohl

  • Description

    Description - Shrubs, to 2 m tall, ascending, sometimes with a tendency to be prostrate, with copious white latex. Stems glabrous. Leaves alternate; stipules persistent, ca 1.0 cm long, ca 0.1 cm wide, laciniate, glabrous; petioles ca 4.0 cm long, rarely longer, terete, glabrous, petiole attachment to lamina narrowly peltate, width between the basal edge of lamina and petiole-lamina junction ca 0.2 cm; lamina coriaceous, adaxial surface dark bluish green, abaxial surface pruinose and bluish white, abaxial surface wax pattern pusticulate; venation camptodromous, veins glabrous; lamina palmately 3-5 lobed, leaves associated with inflorescence frequently nonlobed; median lobes obovate, ca 6.0 cm long, ca 2.5 cm wide, apex obtuse or acute, base acute, base of lobes 0.8 cm wide, lobes at sinus sometimes slightly overlapping; lowest lobes more or less similar to median lobes in outline, slightly smaller, nonsymmetric. Inflorescence a monoecious, terminal, raceme, ca 12.0 cm long; bracteoles and bractlets setaceous, glabrous, ca 0.8 cm long, ca 0.1 cm wide. Pistillate flowers restricted to the base of upper 1/3 of the inflorescence; pedicels 0.9 cm long, glabrous; tepal 0.7 cm long, interior surface pubescent, cleft to base into 5 lobes; ovary subglobose, glabrous. Staminate buds ovoid-ellipsoid, slightly constricted in the middle; flowers small, tepal 0.7 cm long, cleft 1/3 way down into 5 lobes; stamens 10, in 2 whorls of 5 each. Capsules ovoid-ellipsoid, surface not winged, apex rounded. Seeds non vidi.

  • Discussion

    The specimens of Glaziou 22131 (the type of Pax’s Manihot pseudopruinosa) represent a mixture between this species and M. violacea subsp recurvata. The specimen at Kew is M. pruinosa. The specimens of Glaziou 22131 at Arnold Arboretum, Paris and Stockholm are M. violacea subsp recurvata.

  • Common Names

    Mandioca braba

  • Distribution

    Brasil, states of Mato Grosso and Goias.

    Brazil South America| Mato Grosso Brazil South America| Goiás Brazil South America|