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Published In: Bulletin of the Buffalo Society of Natural Sciences 32: 176. 1993. (Bull. Buffalo Soc. Nat. Sci.) Name publication detail

Project Name Data (Last Modified On 1/29/2013)
Acceptance : Accepted
Project Data     (Last Modified On 11/14/2021)
Plant Category: Mosses
country distribution: Venezuela, Colombia, Bolivia
EcoRegions: Open montane, Dry Inter-Andean Valleys, Wet coastal pacific (Chocó), Chaco
elevation: 0-500, 500-1000
substrate: soil, rocks
frequency: rare


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Plants small, forming short tufts, green. Stems short, to ca. 4 mm tall, few branched; in cross-section hyalodermis absent, outer row of cells somewhat small, thick-walled, inner cells larger, central strand well developed; rhizoids few at base. Leaves larger and crowded distally, spreading-incurved when dry, wide-spreading when wet, somewhat rosulate, oblong-elliptical, 2.0-3.2 mm long, somewhat broadly concave, apex obtuse-rounded to broadly acute, narrowed toward base; margins erect, plane below, entire to denticulate at apex; costa strong, percurrent, superficial cells ventrally rounded-hexagonal and bulging, ca. 4 rows across at midleaf, dorsally cells elongate, in cross-section rounded, stereids above and below guide cells, or upper stereids absent or weak, epidermis ventrally well developed, dorsally less so, guide cells 2-4 in 1 layer; lamina unistratose; laminal cells quadrate- to hexagonal-rounded, bulging (some forms papillose, papillae 1-2, usually weak,) on ventral surface, lower surface flat; juxtacostal basal cells somewhat differentiated, short oblong-rectangular, inflated. KOH leaf color reaction yellow on upper leaves, often orange-brown on lower leaves. Dioicous. Perichaetia terminal; inner leaves shorter, ovate-lanceolate to ligulate, weakly sheathing. [Setae to 6 mm long. Capsules erect, urn ellipsoid, to 1.7 mm long; stomata at urn base, superficial; annulus persistent or detaching in fragments, rarely revoluble; opercularostrate; peristomesingle, teeth divided to near base, not twisted, spiculose, basal membrane absent. Calyptrae cucullate, smooth and naked. Spores spherical, lightly papillose.]
Plantas pequeñas, formando manojos cortos, verde. Tallos cortos, ca. hasta 4 mm de alto, poco ramificados; en corte transversal hialodermis ausente, una fila externo de células algo pequeñas, con paredes gruesas, células internas mayores, cordón central bien desarrollada; pocos rizoides en la base. Hojas mayores y agregadas distalmente, incurvado-extendidas en seco, ampliamente extendidas en húmedo, algo arrosetadas, oblongo-elípticas, 2.0-3.2 mm de largo, algo ampliamente cóncavas, ápices obtuso-redondeados a ampliamente agudos, angostadas hacia la base; márgenes erectos, planos abajo, enteros hasta denticulados en el ápice; costa fuerte, percurrente, células superficiales ventralmente redondeado-hexagonales y abultadas, ca. 4 filas transversales a media hoja, dorsalmente células alargadas, en corte transversal redondeadas, estereidas encima y debajo de las células guía, o estereidas superiores ausentes o débiles, epidermis ventralmente bien desarrollada, dorsalmente menor, 2-4 células guía en 1 capa; lámina uniestratificada; células de la lámina cuadradas- hasta hexagonales-redondeadas, abultadas (algunas formas papilosas, papilas 1-2, generalmente débiles,) sobre la superficie ventral, superficie inferior plana; células basales yuxtacostales algo diferenciadas, cortas oblongo-rectangulares, infladas. Dioicas. Periquecios terminales; hojas internas cortas, ovado-lanceoladas hasta liguladas, débilmente envainadoras. Setas hasta 6 mm de largo. Cápsulas erectas, urna elipsoide, hasta 1.7 mm de largo; estomas en la base de la urna, superficiales; anillo persistente o desprendiéndose en fragmentos, rara vez revoluble; opérculo rostrado; peristoma simple, dientes partidos hasta cerca de la base, no torcidos, espiculados, membrana basal ausente. Caliptra cuculada, lisa y desnuda. Esporas esféricas, finamente papilosas.]


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