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(Last Modified On 6/6/2013)
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(Last Modified On 6/6/2013)
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Genus
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Tuberostylis Steetz in Seem.
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PlaceOfPublication
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Bot. Voy. Herald 142. 1853.
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Note
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TYPE: T. rhizophorae Steetz.
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Description
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Creeping to scandent small shrubs, moderately branched; stems terete, fre- quently rooting at nodes. Leaves opposite, distinctly petiolate; blades slightly succulent, obovate to elliptical, the bases cuneate, the margins entire to crenulate, the apex obtuse to short-acuminate, the veins trinervate from near base. Inflores- cence terminal on lateral branches or sessile at nodes, corymbose or in subglobose clusters. Heads discoid with ca. 10-20 florets; involucre of ca. 25-35 subimbricate bracts, in 4-5 series, very unequal, distinctly striate on outer surface, the outer bracts spreading when mature, the inner bracts deciduous; receptacle; flat or slightly convex, glabrous; corolla narrowly tubular with slightly thickened base, the lobes 5, short, nonpapillose, with few or no glands, the corolla cells elongate with sinuous walls; anthers elongate, broad, with mostly short-oblong cells, the cell walls with weak annulate thickenings, the exothecial cells subquadrate, the anther appendage about as long as wide; style base not enlarged, glabrous, the style appendages linear, slightly mamillose. Achenes prismatic to cylindrical, covered with thick rind of hyaline cells when mature, glabrous; carpopodium short, indistinct; pappus lacking. Pollen with short sharp spines.
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Habit
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shrubs
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Distribution
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Tuberostylis is a genus of 2 species distributed mostly along the Pacific coast of northern South America. One species has been collected in Panama.
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