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Las Briofitas. Bolivia Ecologica 59
!Amblystegium Schimp. 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 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
Notes     (Last Modified On 10/26/2012)
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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