Home Andean Bryophytes
Intro
Region
Name Search
Family List
Generic List
Andean Mosses XL database
Physcomitrium (Brid.) Brid. Search in The Plant ListSearch in Index Nominum Genericorum (ING)Search in NYBG Virtual HerbariumSearch in JSTOR Plant ScienceSearch in SEINetSearch in African Plants Database at Geneva Botanical Garden Decrease font Increase font Restore font
 

Published In: Bryologia Universa 2: 815. 1827. (Bryol. Univ.) Name publication detail
 

Project Name Data (Last Modified On 9/20/2009)
Acceptance : Accepted
Notes     (Last Modified On 6/25/2013)
Notes:

The genus is characterized by a elongate, rarely subsessile, erect, cupulate capsule, often flared at the mouth when deoperculated, and the absence of a peristome. A genus of about 20 species recorded for the Neotropics, possibly only 10 or fewer are valid; 68 species worldwide, mostly associated with temperate moist regions. In the tropical Andes on exposed soil, often associated with wet habitats, e.g., along streams or rivers; open sites. The three species reported and one species determined to genus for the tropical Andean countries are given below; the identity of these names are unknown. Physcomitrium is in need of revision; it is likely that some of the reports or described species actually represent Entosthodon, e.g., P. benoistii Thér. = E. laevis (Mitt.) Fife.
 
Este género se caracteriza por sus cápsulas cupuladas, elongadas, erectas, raramente subsésiles, generalmente acampanadas en la boca cuando desoperculadas, y la ausencia de un peristoma. Presenta cerca de 20 especies registradas para el Neotrópico, posiblemente solo 10 ó menos son válidas; 68 especies en todo el mundo, mayormente asociadas con regiones templadas húmedas. En los Andes Tropicales presumiblemente sobre suelo expuesto, generalmente asociado con sitios húmedos, e.g., a lo largo de corrientes o ríos; en sitios abiertos. Physcomitrium necesita una revisión; es probable que algunos de los reportes o especies descritas representen actualmente a Entosthodon, e.g., P. benoistii Thér. = E. laevis (Mitt.) Fife.
 
Physcomitrium eurystomum Sendtn., Denkschr. Bayer. Bot. Ges. Regensburg3: 142. 1841. Type: ? Reported from Peru (2000 m). Report questionable.
 
Physcomitrium lorentzii Müll. Hal., Linnaea 42: 260. 1879. Type: Argentina. Cordobensis, Sierra de Cordoba, in regione locorum Tulumba, Totoral, Sn. Pedro, Junio 1871, Lorentz. Taxonomic status unknown.
 
Physcomitrium pyriforme (Hedw.) Hampe var. serratum (Renauld & Cardot) H.A. Crum & L. E. Anderson, Bryologist 58: 6. 1955. Reported from Peru (2000 m). Same as above? Report questionable.
 
Identity of the following collection is unknown:
 
Physcomitriumsp. 1. See illustration.
Plants small, gregarious. Stems 3-6 mm long. Leaves contorted when dry, obovate, 2.2-3.5 mm long. Setae 2.5-3.0 mm long. Capsule erect, urn cupulate, when dry flared and mouth slightly recurved, when wet ca. 0.6 mm long, at mouth ca. 1.0 mm wide.
Santa Cruz: Fuentes 88 (USZ).

 

Export To PDF Export To Word

Plants mostly small, solitary or forming loose, tufts, light green to yellowish-green. Stems erect, to ca. 5 mm, few branched by innovations, radiculose below; in cross-section outer 1–2 rows of cells slightly differentiated, somewhat smaller, firm-walled, inner cells large, thin-walled, central strand mostly weak. Leaves progressively larger distally, often crispate when dry, erect-spreading to spreading when wet, oblong to obovate-oblong, mostly to 3 mm long, acuminate to acute or acute-rounded; margins plane or erect below, entire to more commonly serrate, limbate or elimbate; costa rather strong, ending well below apex to percurrent or short excurrent; laminal cells large, smooth, mostly thin-walled, median cells rectangular to oblong-hexagonal; basal cells more elongate, lax; marginal cells differentiated, narrower than inner laminal cells, or not. Perichaetia terminal, leaves similar to stem leaves but often larger. Setae short or elongate, to ca. 5 mm long, smooth. Capsules immersed to exserted, erect, urn cupulate, mostly 1-2 mm long (including neck), often flared at mouth when dry, neck usually distinct, short; stomata in neck region, superficial; annulus persistent or not; opercula plano-apiculate or -short rostrate, erect or oblique; peristome, absent. Calyptrae mitrate, inflated or not below, long beaked above, base irregularly lobed, smooth and naked. Spores coarsely papillose or spiculose.

 

Plantas generalmente pequeñas, solitarias o formando manojos laxos, de color verde claro hasta verde-amarillento. Tallos erectos, hasta ca. 6 mm, poco ramificados por innovaciones, radiculosos abajo; en corte transversal 1–2 filas externas de células escasamente diferenciadas, algo menores, con paredes firmes, células internas grande, con paredes delgadas, cordón central generalmente débil. Hojas progresivamente mayores distalmente, a menudo crispas en seco, erecto-extendidas hasta patentes en húmedo, oblongas hasta obovado-oblongas, generalmente hasta 3.5 mm de largo, acuminadas hasta agudas o agudo-redondeadas; márgenes planos o erectos abajo, enteros a más comúnmente serrados, limbadas o elimbadas; costa bastante fuerte, terminando por debajo del ápice hasta percurrente o corto-excurrente; células de la lámina grandes, lisas, generalmente con paredes delgadas, células mediales rectangulares hasta oblongo-hexagonales; células basales más alargadas, laxas; células marginales diferenciadas, más angostas que las células internas de la lámina, o no. Periquecios terminales, hojas similares a las hojas del tallo pero a menudo mayores. Setas cortas o alargadas, hasta ca. 3 mm de largo, lisas. Cápsulas inmersas hasta excertas, erectas, urna cupulada, generalmente 1 mm de largo (incluyendo el cuello), boca acampanada cuando seca, cuello generalmente conspicuo, corto; estomas en la región del cuello, superficiales; anillo persistente o no; opérculo plano-apiculado o corto-rostrado, erectos u oblicuos; peristoma ausente. Caliptra mitrada, inflada abajo o no, largo-rostrada arriba, base irregularmente lobada, lisa y desnuda. Esporas gruesamente papilosas o espiculadas.

 
 
 
© 2014 Missouri Botanical Garden - 4344 Shaw Boulevard - Saint Louis, Missouri 63110