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(Last Modified On 1/28/2013)
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(Last Modified On 1/28/2013)
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Genus
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PFAFFIA Mart.
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PlaceOfPublication
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Nov. Gen. & Sp. 2:20. 1826.
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Synonym
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Serturnera Mart. loc. cit. 36. 1826. Hebanthe Mart. loc. cit. 42. 1826.
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Description
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Flowers normally perfect, bracteate and bibracteolate, sessile, often with an unpleasant odor. Sepals 5, discrete, hypogynous, concave, subequal, the outer 3 slightly larger, often 3-ribbed, greenish white, becoming scariose, with a con- spicuous tuft of intertwined whitish hairs arising mostly within and longer than the outer sepals. Stamens 5, the filaments flattened and united below forming an entire or appendiculate tube; anthers 2--locellate, introrse, medially attached. Ovary ovoid to obovoid, I-locular, 1-ovulate; ovules campylotropous on elongate flattened funicles; style 1, very short; stigma 1, bilabiate, exceeding the style. Fruit an indehiscent utricle; seeds cochleate-orbiculate, reddish brown. Subglabrous or copiously pubescent clambering vines or erlect shrubs. Leaves opposite, entire to undulate, subsessile to short petiolate, glabrate to densely pubescent. Inflorescences paniculate with opposite branches or verticillate branches ultimately bearing spikes.
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Note
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(In some South American species, the inflorescence consists of condensed terminal heads.)
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Distribution
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Of this predominantly South American genus of sorme twenty species, two members of the clambering section HEBANTHE are found in Panama, one apparently reaching its northernmost station here.
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Note
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Stiitzer in a generic monograph (in Rep. Spec. Nov. Beih. 88:2. 1935) has noted that the section HEBANTHE is closer related to Iresine ? TROMMSDORFFIA than to the other two sections of the genus Pf affia.
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Key
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a. Mfature sepals 2-3.5 mmn. long, the ribs often not obNviooQS to tIhe naked eye; rhnachises and lower leaf surfaces densely rufous-pubescent; stamen tube entire .-------------------------- . P. GRANDIFLORA aa. Mature sepals 1.5-2.5 mm. long, the ribs obvious to the naked eye; rhachises and lower leaf surfaces slightly cinereous-pubescent; stamen tube with 2 rounded teeth between adjacent filaments. - . 2. P. IPANICULATA
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