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(Last Modified On 1/11/2013)
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(Last Modified On 1/11/2013)
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Species
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JUSSIAEA LINIFOLIA Vahl,
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PlaceOfPublication
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Eclog. Am. 2:32. 1798.
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Synonym
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Jussiaea micrantha Kunze, Linnaea 24:177. 1 8 51. Ludwigia micrantha Hara, Journ. Jap. 28:293. 1953. Jussiaea Weddellii Micheli, Flora 57:3 01. 1874.
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Description
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Erect annual, 2-20 dm. tall, subglabrous, usually freely branched, the branches wing-angled from below the decurrent leaf bases; leaves lanceolate to ovate, gradually narrowed at base into flattened petioles 2-20 mm. long, acute to subacuminate, pellucid-punctate, membranaceous, glabrous except for minute pubescence on scabrellous margins and veins of under surface or scattered over both surfaces, subentire, with ca. 12-16 main veins on each side of midrib and with poorly developed submarginal vein; principal cauline lvs. 3-10 cm. long, 1-3 cm. wide, gradually reduced up the stem; flowers white, many, solitary in upper axils, arranged in subpaniculate puberulent inflorescence, subsessile; bracteoles triangular, adnate to stipules, scalelike, 0.5-1 mm. long, high on ovary; this linear, enlarged above, 4-angled, puberulent, ca. 8 mm. long; sepals 4, lanceolate, 3-nerved, acuminate, 2.5-3.5 mm. long; petals 4, elliptic, entire, 3 mm. long; disc plane; filaments unequal, slender, 1 and 2 mm. long; anthers barely 0.5 mm. long; style slender, 1.5 mm. long; stigma subcapitate, less than 1 mm. thick; capsule sublinear, slightly enlarged in upper fifth to half, subterete, 18-25 mm. long, 1.5-2 mm. thick, fairly thick-walled and slow to dehisce below, membranaceous and easily dehiscent above; seeds usually pluriseriate in upper part, subhorizontal, oblong- ovoid, ca. 0.5 mm. long, yellowish, minutely cellular-punctate under magnification, with evident raphe; lower seeds uniseriate, almost pendulous, 0.7 mm. long, oblong- ovoid, cellular-punctate, with well developed raphe and embedded in a persistent corky thick angled endocarp.
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Distribution
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Moist places. West Indies and southern Mexico to Peru and Brazil. Old World. No material seen from Panama, but the species is known to occur in Costa Rica and northern Colombia.
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