Manihot Manihotoides (Euphorbiaceae) - CNCFlora

Systematic Position of the Genus 227
Key to the Species of Sect Peltatae
1. Bracts and bracteoles setaceous, less than 0.25 cm wide; petiole attachment peltate; leaf
shallowly stellate, cordate or triangular.
2. Leaf shallowly stellate, more than 10.0 cm wide; petiole attachment very widely peltate,
lamina between petiole-midrib junction and basal edge of leaf more than 3.0 cm wide.
93. M. peltata.
2. Leaf cordate to triangular, less than 10.0 cm wide; petiole attachment narrowly peltate,
lamina between petiole-midrib junction and basal edge of leaf less than 1.0 cm wide.
94. M. populifolia.
1. Bracts and bracteoles foliaceous, more than 0.5 cm wide; petiole attachment basal; leaf
reniform. 95. M. reniform is.
93. Manihot peltata Pohl, P1. Bras. Ic. et Descr. 1: 20. t. 13. 1827; Muell.-Arg. in DC.,
Prodr. 15(2): 1058. 1866; in Martius, Fl. Bras. 11(2): 445. 1874; Pax in Engler,
Pflanzenreich IV. 147(Heft 44): 91. 1910.
Jatropha peltata Steudel, Nomencl. ed. 2. 1: 800. 1840.
Subshrubs, ca 1.0 m tall; several ascending stems arising from a woody base. Stems
glabrous. Leaves alternate; stipules caducous, filiform, glabrous; petioles 3.0-11.0 cm
long, terete, glabrous, petiole attachment to lamina widely peltate, width between
petiole-lamina junction and basal edge of lamina ca 6.0 cm; lamina coriaceous, abaxial
surface wax pattern smooth; venation camptodromous, veins glabrous, major veins
purplish tinged; lamina shallowly 6 lobed, stellate in outline, lobe sinus less than 1/2 the
length of the lobes, lamina ca 18.0 cm long, ca 18.0 cm wide, apex of the shallow lobes
obtuse inflorescence a monoecious, terminal, short, subspicate raceme, ca 6.0 cm long, all
parts glabrous; bracteoles and bractlets setaceous, less than 0.3 cm long, less than 0.1 cm
wide. Pistillate flowers restricted to the base of the upper half of the inflorescence,
pedicels ca 0.75 cm long, tepal 0.8 cm long, cleft to base into 5 lobes, ovary subglobose.
Staminate buds nearly tubular, flowers small, tepal 0.8 cm long, cleft 1/3 way down into
5 lobes; stamens 10, in 2 whorls of 5 each. Capsules 1.1 cm long, dehiscence septicidal.
Seeds 0.8 cm long, oblong, caruncle very small. Fig 111B, C.
TYPE. Pohl 1661 (and some specimens also 1901): Brasil, Goias: ca Trahiras
(syntypes, F, G, K-2, W-2).
DISTRIBUTION. (Fig 111A). Brasil, state of Goias, Alt ca 1000 m, in cerrado. BRASIL
Goias: Irwin, Souza & dos Santos 10937 (F, G, GH, K, MO, NY, RB, SP, UB, US) Cerrado circa 9 km
S of Corumba de Goias, 2 Dec 1965; Pobl Icon Tab. 13 (W). Province Unknown/Uncertain: Burchell
7663 (K); Burchell 7683 (K, P).
94. Manihot populifolia Pax in Engler, Pflanzenreich IV. 147(Heft 44): 93. 1910.
Manihot cordifolia Pax in Engler, Pflanzenreich IV. 147(Heft 44): 94. 1910. Type. Fiebrig 5297
(syntype, G).
Subshrubs. Stems glabrous. Leaves alternate; stipules caducous, filiform, glabrous;
petioles 10.0-15.0 cm long, terete, glabrous, petiole attachment to lamina narrowly
peltate, width between petiole-lamina junction and basal edge of lamina ca 0.5 cm; lamina
membranaceous to slightly coriaceous, abaxial surface wax pattern smooth; venation
camptodromous, veins glabrous; lamina nonlobed, cordate to triangular, ca 8.0 cm long,
ca 8.0 cm wide, apex acuminate to acute, base cordate to truncate. Inflorescence a
monoecious, terminal, subspicate raceme, simple or a cluster of 2 or 3 racemes arising
from a common base, ca 10.0 cm long, sometimes as long as 20.0 cm, all parts glabrous;
bracteoles and bractlets setaceous, less than 0.5 cm long, less than 0.1 cm wide. Pistillate
flowers restricted to the base of the upper half of the inflorescence, pedicels ca 1.0 cm
long, tepal 1.0 cm long, cleft to base into 5 lobes, ovary subglobose. Staminate buds
ovoid-ellipsoid, flowers medium sized, tepal 1.0 cm long, cleft 1/2 way down into 5 lobes;
stamens 10, in 2 whorls of 5 each. Capsules and seeds non vidi. Fig 112A, B.