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(Last Modified On 11/13/2012)
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(Last Modified On 11/13/2012)
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Species
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TRISTICHA TRIFARIA (Willd.) Tul.
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PlaceOfPublication
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Arch. Mus. Hist. Nat. 6:179-189. 1852;
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Synonym
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Warming, Fam. Podost. 6:28-30, f. 24. 1901. Dufourea trifarta Willd. Sp. PI. 5:55. 1810; in Mag. Ges. Naturf. Fr. Berlin 5:63-64. 1811. Dufourea hypnoides St. Hil. in Mem. Mus. Paris 10:472. 1823. Tristicha hypnoides (St. li-l.) Spreng. Syst. Veg. 42:10. 1827; Cario, in Bot. Zeit. 39:25, tab. I-24. 1881. Dufourea Boryi A. Rich. in Chev. Dict. Drogues 5:636. 1829. Philocrena pusilla Bong. in Mem. Acad. Sci. St. Petersb. VI, 32:80, tab. 6. 1835. Potamobryon concinnum Liebm. in Forhandl. Skand. Naturf. Kjoeb. 5:513. 1847. Potamobryon laxum Liebm. loc. cit. 514. 1847. Potamobryon, patulum Liebm. loc. cit. 515. 1847. Tristicbia concinna (Liebm.) I. M. Johnston, in Sargentia 8:130. 1949.
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Description
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Small herbs with shoots forming dense mats attached to much-branched roots; stems terete, 0.2-9.0 cm. long. Leaves tristichous, the rows at first regularly alternating with one another, the older leaves in irregular whorls of 3-6; one row always on the dorsal side of the stem, these ovate, 0.5 mm. wide to 1 mm. long; the other two rows lateral and at the same level, obliquely inserted, these spathulate, to 1 mm. wide, to 3 mm. long; all leaves definitely nerved, entire, obtuse, sessile, sometimes all alike or the older with 2-4 acute apices; fertile branches with 2-3 membranaceous leaves 2.0-2.5 mm. long, which enclose the young flower. Perianth 3-fid or -partite, the lobes obtuse, nerved, 1-2 mm. long; stamen 1.5-2.5 mm. long, the filament spathulate, distinctly nerved, 1-2 mm. long, the anther sagittate or ovate, truncate, slightly emarginate at the base, about 0.8 mm. long; pollen globose, 16-17 u in diameter, yellowish; ovary ellipsoid, roundish or attenuate at the base, 0.5-1.0 mm. long, about 0.8 mm. in diameter; styles 3, linear, about 0.5 mm. long, often papillate; pedicel 3-15 mm. long, terete.
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Distribution
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Widespread in Central and South America, Cuba, and Africa.
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Specimen
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CANAL ZONE: Rio Pedro Miguel, Standley 29933, 29934; Rio Paraiso, Standley 29878; Quebrada Ancha, Steyermark & Allen 17130; Las Cascadas, near Summit, Dodge d Hunter s. n.; Rio Boqueron, Steyermark & Allen 17257; Rio Indio, Dodge d Allen I7400.
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