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(Last Modified On 6/20/2013)
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(Last Modified On 6/20/2013)
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Genus
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Chaptalia Vent.
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PlaceOfPublication
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Deser. PI. Jard. Cels. pl. 61. 1802.
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Note
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TYPE: C. tomentosa Vent.
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Synonym
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Tussilago nutans L. = Chaptalia nutans (L.) Polak. Lieberkuhna Cass., Dict. Sci. Nat. 26: 286. 1823. TYPE: L. bracteata Cass., nom. illeg. - Chaptalia piloselloides (Vahl) Baker. Loxodon Cass., Dict. Sci. Nat. 27: 253. 1823. TYPE: L. brevipes Cass., nom. illeg. = Chaptalia exscapa (Pers.) Baker. Oxydon Less., Linnaea 5: 357. 1830. TYPE: Oxydon bicolor (H.B.K.) Less., nom. illeg. based on Chaptalia runcinata H.B.K. Thyrsanthema Kuntze, Rev. Gen. PI. 1: 369. 1891, based on Chaptalia nutans (L.) Polak.
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Description
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Herbs with monocephalous, more or less scapose, lanate flowering stems. Leaves in a basal rosette, lanceolate to runcinate, entire, toothed or lobed, lanate to various degrees beneath and occasionally above. Heads inconspicuously radiate, turbinate or campanulate; involucre of several series of linear-lanceolate, acute bracts increasing in size inwards, lanate on the outer surfaces; receptacles flat, foveolate; florets trimorphic, occasionally only dimorphic; outermost 1 to several rows of florets female, ligulate, the ligule strap-shaped, more or less tridentate, with or without 1 or 2 minute teeth in the inner part; intermediate series of florets (sometimes wanting) also female, the corolla tubular, shorter than the style; central florets perfect with bilabiate corollas, the outer lip 3-parted, the inner lip 2-parted, the anthers with entire tails, the style short, rounded, hairy. Achenes columnar to fusiform, beaked or beakless, 5-several-nerved, glabrous or villous; pappus of copious, tawny, white or pinkish, setose bristles. Pollen spherical or prolate, tricolporate, reticulate.
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Habit
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Herbs
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Note
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The genus Chaptalia contains about 35 species in 5 sections (Burkart, 1944). The generic limits between Chaptalia, Gerbera, and Triocline are somewhat vague and problems of circumscription have been discussed by Jeffrey (1967). Within Chaptalia itself, many specimens seem to intergrade between species. The fact that fertile artificial hybrids have been readily made between several of the species indicates that there is relatively little genetic divergence between various recognized taxa.
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Reference
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Burkart, A. 1944. Estudio del genero de compuestas Chaptalia. Darwiniana 6: 505-594.
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Key
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a. Scape bractless; leaves lyrate; heads nodding when young and at fruit maturity ...... 1. C. nutans aa. Scapes with scalelike bracts near the heads; leaves lanceolate; heads always upright ...... 2. C. runcinata
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