Manihot Manihotoides (Euphorbiaceae) - CNCFlora

Systematic Position of the Genus 161
flowers restricted to the lower half of the inflorescence, pedicels to 3.5 cm long, tepal 1.0
cm long, yellowish green without purple pigmentation, cleft to base into 5 lobes, ovary
subglobose. Staminate buds ovoid-ellipsoid; slightly elongated; flowers medium sized,
tepal 1.0 cm long, yellowish green without purple pigmentation, cleft 1/3 way down into
5 lobes; stamens 10, in 2 whorls of 5 each. Capsules and seeds non vidi. Fig 71B, C.
TYPE. Pohl 1190: Brasil, Goias: ad Corumba, Corgo do Jaragua et Ouro fino
(syntypes, F, G, M, W-2).
DISTRIBUTION. (Fig 71A). Brasil, state of Goias. Alt 1200 m, on steep sandstone
slopes. BRASIL. Goias: Irwin, Maxwell & Wasshausen 19304 (F, GH, K, NY, SP, UB, US) circa 20
km NW of Corumba de Goias, near road to Niquelandia, 27 Jan 1968; Irwin, Souza & dos Santos
11707 (NY, UB) Summit of Serra Dourada, 20 km SE of Goias Velho, 18 Jan 1966; Macedo 4346 (K)
Pirineus, Municipality Corumba, 17 Feb 1956; Pobl Icon. Tab. 45 (W); Ule 375 (P-2) Serra dos
Pyreneos, Dec 1892. Province Unknown/Uncertain: Burchell 6289 (K).
61. Manihot maguireiana Rogers & Appan, sp nov 13
Frutices gracili, 1.0-1.5 m altus. Folia trilobus, lobi cernui; mediani lobi lanceolati
inciso margine, raro intigra margine, basis racemi, ca 3.0 cm longi. Capsulae parvae, ca 0.9
cm longae.
Slender shrubs, 1.0-1.5 m tall, stems ascending. Young stems grayish brown,
glabrous; mature stems dark purplish brown, glabrous. Leaves alternate; stipules
caducous, filiform, less than 0.5 cm long, glabrous; petioles short, less than 4.0 cm long,
terete, glabrous, dark purplish tinged, petiole attachment to lamina basal, nonpeltate;
lamina membranaceous, adaxial surface dark green, abaxial surface silvery gray, wax
pattern on the abaxial lamina surface shows discrete rings with irregular sides at
magnifications of x40; venation frequently craspedodromous, sometimes camptodromous,
veins glabrous; lamina 3 lobed, lobes usually deflexed; median lobes lanceolate
with incised margin, rarely with entire margin, ca 7.0 cm long, ca 2.0 cm wide, the lobules
along the lobe margin attenuate, ending in a fine point, the extension of a secondary vein,
apex acuminate, base of lobes extremely constricted, less than 0.2 cm wide, width
between base of sinus and petiole-lamina junction less than 0.2 cm; lowest lobes more or
less similar to median lobes in size and outline, slightly nonsymmetric. Inflorescence
monoecious, terminal, short racemes, simple or a cluster of 2 arising from a common
base, ca 3.0 cm long, all parts glabrous; bracteoles semifoliaceous, ca 1.0 cm long, 0.2 cm
wide, margin entire, rarely serrate; bractlets semifoliaceous, ca 0.75 cm long, 0.1 cm wide.
Pistillate flowers restricted to the base of the inflorescence, pedicels 1.0-2.0 cm long;
tepal 0.9 cm long, yellowish green with purplish streaks on the outside, pale pinkish
inside, cleft to base into 5 lobes; ovary subglobose; the trifid stigma sparsely lobed and
lobulate. Staminate buds ovoid-ellipsoid; flowers small, tepal 0.9 cm long, yellowish green
with pinkish streaks externally, pale pinkish internally, cleft 1/3 way down into 5 lobes;
stamens 10, in 2 whorls of 5 each, the superior whorl 0.7 cm long, the inferior 0.5 cm
long, Capsules small, 0.9 cm long, subglobose, surface smooth, without wings, apex
rounded. Seeds small, 0.7 cm long, oblong, caruncle not prominent. Fig. 72A, B.
TYPE. Cardona 530: Venezuela, Bolivar: Rio Paragua, Isla el Casabe, alt ca 265 m,
21 Apr 1943 (holotype, VEN; isotypes, A, US).
DISTRIBUTION. (Fig 71D). Venezuela, state of Bolivar. Alt to 500 m. Frequent on
rocky ridges and in savannas. VENEZUELA. Bolivar: Cardona 764 (US) Cerro Perro, Alto Rio
Paragua, Jul 1943;Steyermark 75296 (VEN) vicinity of Uriman, 30 Apr 1953; Wurdack & Guppy 176
(NY, US, VEN) 3 km E of Cano Azul, Hato La Vergarena, 23 Oct 1954.
13 This species is named in honor of Dr. Bassett Maguire, outstanding botanist of The New York
Botanical Garden, one of the foremost students of the vast and little known region of northeastern
South America, the "Lost World" or Roraima Shield.