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(Last Modified On 6/3/2013)
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(Last Modified On 6/3/2013)
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Species
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Vernonia brachiata Benth. in Orst.
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PlaceOfPublication
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Vidensk. Meddel. Dansk Naturhist. Foren. Kjobenhavn 1852: 67. 1852.
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Note
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TYPE: Costa Rica, Oersted s.n.
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Synonym
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Cacalia brachiata (Benth.) Kuntze, Rev. Gen. P1. 969. 1891.
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Description
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Herbs or small shrubs to 3 m tall; branches herbaceous, striate, becoming angular, glabrous or nearly so. Leaves subsessile; blades broadly elliptic to broadly obovate, acute to short acuminate at the apex, subauriculate at the base, 10-30 cm long, 5-13 cm broad, marginally entire to serrulate, glabrous to glabrescent above and beneath, lateral veins ascending, 10-14 pairs. Inflorescences terminal, leafless, 10-30 cm high, in long, freely branched cymes, the individual cymes 10-25 cm long with 22-46 heads, straight or more often recurved, peduncles 1.4-3.8 cm long, the bracts not foliaceous, linear, to 3 mm long. Heads with 18-22 florets, involucre broadly campanulate, 3-4 mm high, 4-5-seriate, the involucral bracts loosely imbricate, ciliate, the outer bracts narrowly ovate to lanceolate, acute to subcuspidate, with a thickened midrib, the inner bracts oblong to oblanceolate, acute to subacute, scarious, purple-tipped; receptacle flat, alveolate, naked; corolla tubular, 4-5 mm long, 5-lobed, the lobes lanceolate; stamens 5, anthers 2-2.5 cm long, apically acute,.broadly sagittate; styles 4-4.5 mm long, the 2 branches 1-2 mm long, antrorsely puberulous. Achenes narrowly cylindric, 2-3 mm long, faintly ribbed, puberulous; pappus biseriate, the inner bristles filiform, 4-5 mm long, persistent, the outer bristles linear, to 0.3-0.6 mm long, persistent.
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Habit
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Herbs or small shrubs
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Distribution
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Previously known in Central America only from Costa Rica, reported with certainty from western Panama.
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Note
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he very large leaves coupled with the long, often arching, many-headed cymes easily separate this taxon from the other Panamanian species of Vernonia.
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Specimen
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BOCAS DEL TORO: Changuinola Valley, Lincoln Creek, Dunlap 425 (NY). CHIRIQUI: Corotui, 6 km W of airport of Puerto Armuelles, 1(0-200 m, Liesner 10 (MO). 8 mi from Paso Canoas to Cafias Gordas, Liesner 221 (MO).
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