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(Last Modified On 1/10/2013)
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(Last Modified On 1/10/2013)
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Genus
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ACISANTHERA P. Br.
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PlaceOfPublication
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Hist. Jamaic. 217. t. 22. 1756.
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Description
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Flowers 4-merous or 5-merous. Hypanthium subglobose to broadly campan- ulate. Calyx-tube none or very short; sepals triangular to ovate or oblong, equaling or exceeding the hypanthium. Petals usually small, mostly obovate. Stamens di- morphic, the epipetalous series smaller or in some species imperfect. Anthers obovoid to subulate; connective in the episepalous series prolonged below the thecae, bearing at base two rounded to linear, anterior appendages; that of the epipetalous stamens shorter or not prolonged, with two short or tuberculiform appendages. Ovary free, usually subglobose, 2- to 4-celled; style slender; stigma punctiform or truncate. Capsule 2- to 4-valved; seeds ovoid or oblong, more or less cochleate, minutely foveolate. Herbaceous or suffrutescent, simple or freely branched plants, with small, dentate to entire leaves and small, axillary or paniculate, white to pink or purple flowers.
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Distribution
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About 20 species, most numerous at low altitudes in South America; two others occur elsewhere in Central America and one in Cuba.
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Key
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a. Leaves ovate to ovate-oblong, conspicuously denticulate or crenate, cuneate to the petiole; stems freely and diffusely branched. b. Appendages of the episepalous stamens lanceolate to linear, acute or subacute; connective of the epipetalous stamens straight to the filament, about 0.2 mm. long .------------------- 1. A. QUADRATA. bb. Appendages of the episepalous stamens clavate or narrowly obovoid, blunt or rounded; connective of the epipetalous stamens at right angles to the anther, prolonged about 0.5 mm. to the filament. ------ 2. A. UNIFLORA. aa. Leaves ovate to subrotund, entire or essentially so, strictly sessile at the broad base; stems erect, simple or sparingly branched. --..-.- .-...3. A. LIMNOBIOS.
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