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(Last Modified On 1/14/2013)
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(Last Modified On 1/14/2013)
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Genus
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LANGSDORFFIA Mart.
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PlaceOfPublication
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Eschweg. Journ. Bras. 2:178. 1818.
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Synonym
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Langsdorfia C. A. Agardh, Aphor. 203. 1825. Senftenbergia Klotzsch & Karst. ex Klotzsch, in Linnaea 20:460. 1847, nom. nud. in synon.
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Description
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Rhizome lobed, creeping or upright, often dichotomously branched, tomentose and sometimes glabrescent. Inflorescence dioecious or rarely monoecious, capitate to clavate, the peduncle terete, thick, enclosed at the base by a short, lobed or toothed sheath, above the sheath vested with many imbricate scales, the scales in the basal portion ovate to oval-lanceolate, gradually becoming progressively lanceolate towards the flower-head, the head globose, ovoid or ellipsoid, staminate generally larger than the pistillate, yellow, yellowish-red or red, the staminate flowers sub- tended by reduced pistillate flowers, the pistillate flowers agglutinate into a dense mat, ebracteate. Perianth in the staminate flowers composed of 3 or rarely 2 concave tepals, valvate; in the pistillate flowers reduced to an epigynous collar, obscurely 2- or 4-lobed. Stamens as many as the tepals and opposite them, exserted, the filaments short, connate into a staminal column, the anthers connate below and free above, each with 4 pollen sacs at the base and 2 at the apex, extrorse; absent in the pistillate flowers. Pistil 1, the ovules 1, fused to the ovary wall, the style 1, erect, filiform, deciduous, the stigma minutely papillate; pistillode absent in the staminate flowers. Fruit drupaceous, with fleshy epicarp and hard endocarp.
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Distribution
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Apparently only a single species from Mexico to southern Brazil.
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