Tropicos | Name - Rhabdoweisia Bruch & Schimp.

Bolivia Bryophytes > Rhabdoweisiaceae > Rhabdoweisia

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Rhabdoweisia Bruch & Schimp.

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Project Name Data (Last Modified On 5/16/2009)

Acceptance : Accepted

Project Data (Last Modified On 10/28/2017)

Plant Category: Moss

Notes (Last Modified On 10/28/2017)

general taxon notes:

Rhabdoweisia contains five species distributed in temperate and tropical montane regions. In Bolivia and the Neotropics two species are recorded. The genus is characterized by the small stature of the plants, linear- to oblong lanceolate leaves, crispate when dry, plane to weakly recurved on one side, subentire to denticulate or serrulate distally, subquadrate upper cells, undifferentiated alar cells, 8-ribbed capsules, and smooth or weakly obliquely striate peristome.

Rhabdoweisia contiene cinco especies distribuidas en regiones montañosas templadas y tropicales. En Bolivia y el Neotrópico se registran dos especie: R. crispata (Dicks. ex Con.) Lindb. y R. fugax (Hedw.) Bruch & Schimp. El género se caracteriza por la reducida estatura de las plantas, hojas lineales- hasta oblongo-lanceoladas, crispas en seco, planas hasta débilmente recurvadas sobre un lado, subenteras hasta denticuladas o serruladas distalmente, células superiores subcuadradas, células alares indiferenciadas, cápsulas 8-acostilladas, y peristoma liso o débilmente estriado oblicuamente.

Reference List (Last Modified On 10/28/2017)

Reference:

Lawton, E. 1961. A revision of the genus Rhabdoweisia. Bryologist 64: 140–156.

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Plants rather small, forming short tufts, green. Stems erect, few branched; central strand absent. Leaves somewhat crispate when dry, linear-lanceolate to ligulate, apex acuminate to acute or obtuse; margins plane to slightly recurved below, entire to irregular denticulate; costae single, ending below apex; median and upper cells quadrate-rounded or transversely-short elongate, smooth; lower and basal cells elongate, rather lax; alar region undifferentiated. Autoicous. Perichaetia terminal; leaves larger or similar in size to stem leaves. Setae rather short to elongate, smooth. Capsules erect, urn ovoid to short cylindrical, when dry 8-ribbed; exothecial cells short to long rectangular, walls firm; stomata 1-few at urn base, superficial; annuli absent or weakly differentiated and persistent; opercula short rostrate, oblique; peristome single, reduced, smooth or obliquely striate. Calyptrae cucullate, smooth and naked. Spores finely to rather coarsely papillose.

Plantas muy pequeñas, formando manojos cortos, de color verde. Tallos erectos, poco ramificados; sin cordón central. Hojas algo crispas en seco, lineo-lanceoladas hasta liguladas, ápices acuminados hasta agudos u obtusos; márgenes planos a escasamente recurvados abajo, enteros hasta denticulados irregularmente; costa simple, terminando bajo el ápice; células mediales y superiores cuadrado-redondeadas o cortas transversalmente alargadas, lisas; células inferiores y basales alargadas, bastante laxas; región alar indiferenciada. Autoicas. Periquecios terminales; hojas mayores o similares en tamaño a las hojas del tallo. Setas muy cortas hasta alargadas, lisas. Cápsulas erectas, urna ovoide hasta corto-cilíndrica, en seco 8-costillas; células exoteciales corto- hasta largo-rectangulares, con paredes firmes; estomas 1-pocos en la base de la urna, superficiales; anillo ausente o débilmente diferenciado y persistente; opérculo corto-rostrado, oblicuo; peristoma simple, reducido, liso o oblicuamente estriado. Caliptra cuculada, lisa y desnuda. Esporas fina hasta muy toscamente papilosas.