(Last Modified On 6/3/2013)
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(Last Modified On 6/3/2013)
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Genus
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Centratherum Cass.
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PlaceOfPublication
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Bull. Soc. Philom. 1817: 31. 1817.
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Note
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TYPE: C. punctatum Cass.
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Synonym
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Ampherephis H.B.K., Nov. Gen. Sp. P1. 4: 31. 1818. Sphixia Schrank, P1. Rar. Hort. Monac. tab. 80. 1819. Amphibecis Schrank, Syll. Ratisb. 1: 86. 1824. Crantzia Vell., Fl. Flum. Ic. 8, tab. 153. 1827 (1835). Decaneurum DC., Arch. Bot. (Paris) 2: 516. 1833. Phyllocephalum Blume, Bijdragen. 888. 1826. Rolfinkia Zenk., P1. Ind. 13, tab. 14. 1837. Wightia Spreng. ex. DC., Prod. 5: 67. 1836.
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Description
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Herbs to subshrubs, often diffusely branched; branches terete, glabrescent to villous. Leaves alternate, petiolate; blades lanceolate, ovate, elliptic or obovate, acute to subacuminate at the apex, cuneate at the base, marginally serrate, rarely entire, pubescent. Inflorescences axillary to terminal; involucre broadly hemi- spherical to broadly campanulate. Heads discoid with many florets; involucral
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Habit
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Herbs to subshrubs
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Description
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bracts in several series, the outer bracts foliaceous, the inner bracts erect, appressed, membranous to scarious; receptacle flat to subconvex, naked; florets regular, corolla narrowly tubular, 5-lobed, purplish to bluish; stamens 5, the anthers sagittate, obtuse at the base, exserted; ovary oblong, compressed, style slender, the branches exserted. Achenes 8-10-costate, oblong to cylindric; pappus of few to many bristles, the bristles short, caducous.
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Distribution
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Centratherum is a small pantropical genus of about eight species with only one reported in Panama.
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Project Name
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