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Published In: Bryologia Europaea 6: 45 (fasc. 55–56. Mon. 1.). 1853. (Bryol. Eur.) Name publication detail

Project Name Data (Last Modified On 10/24/2009)
Acceptance : Accepted
Project Data     (Last Modified On 10/27/2017)
Plant Category: Moss

Notes     (Last Modified On 10/27/2017)
general taxon notes:

Amblystegium contiene ca. 20-30 (60) especies, generalmente en regiones templadas y siempre cerca de sitios permanente o estacionalmente mojados. Tres especies son registradas en Bolivia.


Amblystegium contains ca. 20-30 (60) species, mostly of temperate regions, and nearly always in seasonally or permanent wet sites. The genus Orthotheciella (Müll. Hal.) Ochyra is included here.


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Plants small to medium sized, green to yellowish brown or green. Stems spreading, irregularly pinnately branched; in cross-section hyalodermis absent, central strand present; paraphyllia absent, pseudoparaphyllia foliose. Leaves erect to erect-spreading, ovate-lanceolate or –triangular, smooth, not plicate, base rarely indistinctly decurrent, apex short or long acuminate; margins plane, occasionally reflexed at base, entire to weakly or finely serrulate; costa single, ca. 1/3 to commonly 1/2 to short excurrent; laminal cells smooth, median and upper cells rhomboidal or oblong-rhomboid, thin- to thick-walled, walls entire, rarely porose; alar region undifferentiated to weakly differentiated, cells slightly enlarged, oblong-rectangular. Autoicous. Setae erect, elongate, usually red. Capsules horizontal, rarely erect, urn curved or rarely straight, cylindrical; peristome well developed. Calyptrae cucullate, naked and smooth. Spores mostly lightly papillose.


Plantas pequeñas a medianas, de color verde a pardo-amarillento o verde. Tallos patentes, con ramas irregularmente pinnadas; sin hialodermis en sección transversal, cordón central  presente; sin paráfilos, pseudoparáfilos foliosos. Hojas erectas a erecto-extendidas, ovado-lanceoladas o –triangulares, lisas, no plegadas, base rara vez indistintamente decurrente, ápices cortos o largo-acuminados; márgenes planos, ocasionalmente reflexos en la base, enteros a débil- o finamente-serrulados; costa simple, ocupando aproximadamente 1/3 a comúnmente 1/2 de la lámina hasta corto-excurrente; células de la lámina lisas, células mediales y superiores rómbicas u oblongo-romboides, paredes celulares delgadas a gruesas, enteras, rara vez porosas; región alar indiferenciada a débilmente diferenciada, células escasamente agrandadas, oblongo-rectangulares. Autoicas. Setas erectas, alargadas, generalmente rojas. Cápsulas horizontales, rara vez erectas, urna curvada o rara vez recta, cilíndrica; peristoma bien desarrollado. Caliptra cuculada, desnuda y lisa. Esporas por lo general finamente papilosas.


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1. Stem leaf costa 60-94 µm wide at leaf base … A. tenax
1. Stem leaf costa to 58 (rarely to 77) µm wide at leaf base … 2
2. Stem leaves 0.5-1.0 mm long; costa ca. 2/3 leaf length, rarely extending into acumen; leaf margins at least partially bluntly serrulate; basal alar cells rectangular or short-rectangular … A. serpens
2. Stem leaves 0.6-2.1 mm long; costa extending into acumen; leaf margins bluntly serrulate or subentire; basal alar cells rectangular or long-rectangular … A. varium
1. Costa de las hojas del tallo de 60-94 µm de ancho en la base foliar … A. tenax
1. Costa de las hojas del tallo de hasta 58 (raramente hasta 77) µm de ancho en la base foliar … 2
2. Hojas del tallo de 0.5-1.0 mm de largo; costa aprox. 2/3 del largo foliar, raramente extendiéndose dentro del acumen; márgenes foliares al menos parcialmente obtusamente serrulados; células alares basales rectangulares o corto-rectangulares … A. serpens
2. Hojas del tallo de 0.6-2.1 mm de largo; costa extendiéndose dentro del acumen; márgenes foliares obtusamente serrulados o subenteros; célula alares basales rectangulares o largo-rectangulares … A. varium
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