Tropicos | Name - Aongstroemia Bruch & Schimp.

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Aongstroemia Bruch & Schimp.

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Search in African Plants Database at Geneva Botanical Garden

Project Name Data (Last Modified On 10/1/2009)

Acceptance : Accepted

Project Data (Last Modified On 10/8/2017)

Plant Category: Mosses

Notes (Last Modified On 10/8/2017)

Notes:

Aongstroemia contains about 10 species mostly at high elevations, widely distributed; three species in the Neotropics. Aongstroemia filiformis is frequent in open premontane to high montane sties, usually on exposed banks and road cuts, whereas A. julacea is restricted to subpáramo to full páramo sites, on soil, often inconspicuously associated with other tuft-forming bryophytes; A. orientalis is presently only known from the páramos of Venezuela.

Aongstroemia contiene alrededor de 10 especies mayormente de altas elevaciones, ampliamente distribuidas; tres especies en el Neotrópico. Aongstroemia filiformis es frecuente en sitios premontanos abiertos a montano altos, usualmente sobre bordes de caminos y caminos interrumpidos, mientras que A. julacea está restringida a sitios desde el subpáramo hasta páramo propiamente dicho, sobre suelo, generalmente asociada inconspicuamente con otras briófitas cespitosas.

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Plants small, slender, forming loose tufts, dark green to yellowish-green or golden-brown. Stems erect, slender, julaceous, few branched; central strand present. Leaves clasping and deeply concave, shortly oblong-obtuse or -truncate, or abruptly subulate from an obovate sheathing base; margins incurved, entire or strongly erosed-dentate distally; costae single, subpercurrent or long excurrent; laminal cells smooth, median cells linear or linear-vermicular, thick-walled; lower or basal cells short to long rectangular. Dioicous. Perigonia appearing lateral on distal stems, inflorescence bud-like. Perichaetia terminal or appearing lateral by innovations, leaves larger and strongly convolute. Setae elongate, smooth. Capsules erect, urn obloid or ovoid-cylindrical; opercula long rostrate, oblique; gymnostomous or peristome present, single, teeth 16, divided1/2-2/3 into 2-4 segments, perforate below, papillose distally. Calyptrae cucullate, smooth and naked. Spores spherical, lightly papillose.

Plantas pequeñas, delgadas, formando manojos laxos, de color verde oscuro hasta verde-amarillento o pardo-dorado. Tallos erectos, delgados, juláceos, poco ramificados; con cordón central. Hojas amplectantes y profundamente cóncavas, brevemente obloide-obtusas o -truncadas, o abruptamente subuladas desde una base obovada envainadora; márgenes incurvados, enteros o marcadamente erosionado-dentados distalmente; costa simple, subpercurrente o largo excurrente; células de la lámina lisas, células mediales lineales o lineo-vermiculares, con paredes gruesas; células inferiores o basales corto- a largo-rectangulares. Dioicas. Perigonios aparentemente laterales sobre tallos distales, inflorescencias en forma de yemas. Periquecios terminales o de apariencia lateral por innovaciones, hojas mayores y marcadamente convolutas. Setas alargadas, lisas. Cápsulas erectas, urna obloide u ovoide-cilíndrica; opérculo largo-rostrado, oblicuo; gimnostóma o peristoma presente, simple, con 16 dientes, divididos hasta 1/2-2/3 en 2-4 segmentos, perforados hacia abajo, distalmente papilosos. Caliptra cuculada, lisa y desnuda. Esporas esféricas, finamente papilosas.