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(Last Modified On 3/15/2013)
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(Last Modified On 3/15/2013)
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Genus
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Turnera L.
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PlaceOfPublication
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Sp. P1. 271, 1753
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Reference
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Gen. P1. ed. 5, 131, 1754.
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Description
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Herbs, annual or perennial, suffrutices, shrubs, or infrequently trees, the hairs usually simple, rarely stellate. Leaves petiolate, the stipules minute or absent, the blade entire-margined or the margins variously toothed, often 2-glandular at the base. Flowers usually solitary in the axils of the uppermost leaves, rarely in cymose or capitate inflorescences, homo- or heterostylous; pedicels free or ? adnate to the petioles of the subtending leaves; bracteoles sometimes foliaceous; hypan- thium present; petals inserted at or near the apex of the hypanthium, obovate, cuneate or unguiculate at the base, variously colored, but often yellow; corona wanting; stamens inserted near the base, ? in the middle, or near the apex of the hypanthium, the lower parts of the filaments broadened and adnate by their membranous margins to the hypanthium forming 5 nectariferous pockets; ovary with 3 oo-ovulate placentae; styles simple; stigmas penicillate or flabellate. Capsules loculicidal to below the middle or almost to the base, the pericarp rather thick, smooth to tuberculate; seeds straight or curved, the testa striate-foveolate.
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Habit
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Herbs suffrutices
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Habit
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shrubs trees
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Distribution
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A New World genus of about 60 species, ranging from Texas to Argentina, but primarily tropical; some species introduced in the Old World tropics; three species at present reported from Panama.
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Key
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a. Leaf-blades eglandular at the base; pedicels free; capsule glabrous; seeds rather densely whitish-puberulous ............... 1. T. panamensis aa. Leaf-blades usually conspicuously 2-glandular at the base; pedicels adnate to the petioles of the subtending leaves; capsule with indumentum; seeds gla- brous. b. Bracteoles foliaceous ovate, the lower half deeply incised, the apex long- acuminate, 15-30 mm long --------- 2. T. angustifolia bb. Bracteoles linear-subulate, to 10 mm long ------------3. T. ulmifolia
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