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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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Merremia Dennstedt
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PlaceOfPublication
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Schluss Hort. Malab. 34. 1818.
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Note
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TYPE: M. hederacea (Burm. f.) Hall. f. = M. convolvulacea Dennst.
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Synonym
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Skinnera Choisy, MWm. Soc. Phys. Geneve 6: 487. 1833, non Forst. (1776). TYPE: S. caespitosa Choisy = Merremia hirta (L.) Merrill. caespitosa Choisy = Merremia hirta (L.) Merrill. Spiranthera Bojer, Hort. Maurit. 226. 1837, nomen nudm, non St. Hil. (1823).
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Description
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Vines or lianas; usually herbaceous, some lignescent, small or large. Leaves entire, lobed, or palmately compound with 3-7 leaflets, glabrous or pubescent. Flowers solitary and axillary, in few-flowered dichasia or sub-umbellate, the bracts linear or lanceolate; sepals subequal, oblong to elliptical; corolla cam- panulate, large or small, white, yellow or purple; the filaments equal or subequal, mostly glabrous at the base, the anthers spirally twisted with complete de- hiscence, the pollen 3-colpate or rarely pantocolpate; ovary usually glabrous, 2-3 carpellate, 4-6 ovulate, the style filiform, the stigma globose or biglobose, included. Fruits capsular, 2-4-celled, longitudinally dehiscent by 4-6 valves or irregularly, the pericarp thin and fragile; the seeds 4-6, glabrous or pubescent.
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Habit
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Vines or lianas
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Note
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A tropical and subtropical genus of 60-80 species. Except for a study of the Brazilian members of the genus by Falcdo (1954), there has been little study of the American species since O'Donell's (1941) revision.
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Reference
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O'Donell, C. A. Revision de las especies Americanas de Merremia. Lilloa 6: 467-554. 1941. Falcdo, J. Contribuiqdo ao estudo das especies Brasileiras do genero Merremia Dennst. Rodriguesia 16-17: 105-114. 1954.
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Key
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aa. Leaves deeply lobed to subpalmately compound; inflorescences dichasial. b. Leaves deeply lobed but not compound, the lobes connected by some tissue at the base. c. Lobes of leaves entire; flowers yellow, broadly funnelform to subcampanulate ...... 4. M. tuberosa cc. Lobes of leaves crenate; flowers white with purplish to reddish centers, broadly campanulate ...... 2. M. dissecta bb. Leaves palmately compound, the segments distinct. d. Sepals and stems densely pubescent with erect yellowish, eglandular trichomes ...... 1. M. aegyptia dd. Sepals and stems glabrous or with glandular trichomes on the sepals ...... 3. M. qulinquefolia
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