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(Last Modified On 5/31/2013)
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(Last Modified On 5/31/2013)
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Genus
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Bonamia Thouars
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PlaceOfPublication
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Hist. Veg. Isl. France 1: 33. 1804, nom. cons.
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Note
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TYPE: B. madagascariensis Poir.
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Synonym
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Breweria R. Br., Prodr. 487. 1810. TYPE: Bonamia linearis (R.Br.) Hall. f. Trichantha Karst. & Triana, Linnaea 28: 437. 1856, non Hook. (1844). TYPE: T. ferruginea Karst. & Triana = Bonamia trichantha (Karst. & Triana) Hall. f.
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Description
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Lianas to small scrambling shrubs or herbaceous vines, mostly perennial, glabrous to pubescent. Leaves entire, lanceolate to ovate. Inflorescences of solitary flowers or few-flowered dichasia or panicles; the bracts small. Flowers with the sepals obtuse to acute, subequal, the outer ones larger and suborbicular; corolla campanulate or funnelform, the limb plicate, the interplicae ferrugineous; stamens included, the filaments filiform, mostly triangular-dilate and glandular- pubescent at the base, the anthers oval or oblong, the pollen 3-colpate; ovary 2-locular, 4-ovulate, the style filiform, bifid to almost entire, or the styles 2 and free, the stigmas capitate, subglobose. Fruits capsular, 4-valvate, pericarp membranaceous to coriaceous; seeds 4 or fewer by abortion, glabrous or pu- bescent.
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Habit
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Lianas to small scrambling shrubs or herbaceous vines
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Distribution
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There are about 45 species of this genus in the tropics and subtropics of both hemispheres. Two species occur in Panama.
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Note
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Myint and Ward (1968) report a third species for Central America, but this species belongs to the genus Itzaea (Austin, 1971).
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Reference
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Austin, D. F. Relations of Itzaea sericea. Biotropica 3: 32-35. 1971. Myint, T. & D. B. Ward. A taxonomic revision of the genus Bonamia (Con- volvulaceae). Phytologia 17: 121-239. 1968.
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Key
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a. Leaves sparsely pubescent, glabrous or glabrescent on both sides; inner and outer sepals sparsely pubescent to glabrous, to 5 mm long; seeds pubescent with long yel- lowish trichomes ...... 2. B. trichantha aa. Leaves densely pubescent on both sides; inner and outer sepals densely pubescent, to 10 mm long; seeds glabrous ...... 1. B. sulphurea
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