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(Last Modified On 7/18/2013)
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(Last Modified On 7/18/2013)
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Species
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Urvillea ulmacea H.B.K.
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PlaceOfPublication
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Nov. Gen. Sp. P1. 5: 82. 1821.
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Note
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TYPE: Venezuela, Humboldt & Bonpland 629 (P).
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Description
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Vines, the younger parts herbaceous, becoming woody; stems terete when young, striate, -sparsely uncinate-pubescent, the older stems terete or 3-sided, 3-sulcate, shiny, glabrate. Leaves 3-f oliolate, 4-15 mm long; petiole without wings, 1-6 cm long, margined, glabrate to sparsely pubescent; leaflets ovate to ovate-lanceolate, acuminate to obtuse at the apex, attenuate at the base on termi- nal leaflets, obtuse to subeordate on lateral leaflets, 2-7(-9) cm long, 1-3.5(-4.5) cm wide, serrate to crenate marginally except at the base, the teeth glandular, the upper surface strigose to villous on the midrib and some major veins, the re- mainder glabrous or sparsely puberulent, the lower surface densely pubescent to almost glabrous except on the veins; stipules inconspicuous. Thyrses borne on short branches in the upper axils, usually subtended by tendrils, the floriferous part usually less than 3 cm long; pedicels glabrous, 1.5-2.5 mm long, articulate in the lower third. Flowers white, to 4 mm long; sepals ovate to ovate-oblong, glabrous, ciliate, the outer sepals to ca. 1.5 mm long; petals obovate, glabrous out- side, glandular inside, ciliate, the anterior scales ellipsoid, 1/2-2/3 as long as the petals, conspicuously ciliate, the crest fan shaped, thin, pale yellow green, con- spicuously villous along the upper margin and back side, the deflexed appendage rounded, slightly longer than the crest, glabrous except conspicuously ciliate, the cilia longer than the appendage itself; disc glands 2, large for size of flower, slightly pubescent; stamens free with glabrous filaments; ovary glabrous or mi- nutely puberulent, the style short. Capsules elliptic, to 4 cm long and 2 cm wide, obtuse to rounded at the apex, sometimes emarginate, stipitate and acute at the base, the cells somewhat inflated, the wings soft and thin; seeds oval, dark, shiny, 3-4 mm long, the hilum near one end, reniform.
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Habit
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Vines
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Note
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The species is recognized by its small 3-foliolate leaves and inflated, mem- branous, prominently 3-winged fruits. Flowering and fruiting may occur throughout much of the year elsewhere but the species is expected to be seasonal in Panama and, like Serjania, to flower and fruit in the dry season.
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Distribution
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ranges from southern Texas to Argentina.
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Note
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In Panama it is known from tropical moist forest around Madden Lake and from tropical wet forest in western Panama. It is to be expected elsewhere.
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Specimen
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CANAL ZONE: Road between Transisthmian Hwy. and Madden Dam, 100 m, Gentry 6739 (MO). cmmQuiI: San Bartolo Limite, 300 m, Busey 422 (F, MO, PMA, US). PANAMA: Edge of Madden Lake, Gentry 5032 (MO).
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