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Thamnobryum Nieuwl. 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: American Midland Naturalist 5(2): 50. 1917. (Amer. Midl. Naturalist) Name publication detailView in Biodiversity Heritage Library
 

Project Name Data (Last Modified On 11/22/2009)
Acceptance : Accepted
Notes     (Last Modified On 1/12/2014)
general taxon notes:
Thamnobryum contains ca. 40 species, distributed in tropical regions and moist temperate regions; three species in the Neotropics. In Bolivia a single species is recorded, Thamnobryum fasciculatum (Hedw.) I. Sastre in I. Sastre & W.R. Buck. The genus is characterized by the dull, dark green to blackish green plants, subpercurrent costa, and rhombic apical cells.
 
Thamnobryum contiene ca. unas 40 especies, distribuidas tanto en regiones tropicales y como regiones templadas húmedas; tres especie en el Neotrópico. En Bolivia una sola especie es registrada, Thamnobryum fasciculatum (Hedw.) I. Sastre en I. Sastre & W.R. Buck. Este género se caracteriza por las plantas verde pálidas, verde oscuras hasta verde negruzcas, costa fuerte, subpercurrente y células apicales rómbicas.

 

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Plants small to rather robust, 5-15(-20) cm tall, forming loose tufts, glossy dark green to blackish. Primary stems creeping, leaves scale-like, ovate-triangular, to ca. 1.5 mm long, often eroded from stem, radiculose. Secondary stems frondose, stipes mostly elongate, leaves ovate-subulate. Stem leaves loosely complanate, erect-spreading, ovate to ovate-lanceolate or oblong-ligulate, 2.5-4 mm long, to 1.2 mm wide, ± plicate when dry, ± concave, lateral leaves folded below, apex broadly acute, base undifferentiated to weakly auriculate; margins plane or slightly recurved at base, irregularly strong serrate in distal 1/4-1/3; costa single, subpercurrent, strong; apical cells rhomboidal-fusiform or short-hexagonal, thick-walled, smooth; median cells linear to oblong-rectangular; lower and basal cells irregularly long-rectangular. Branch leaves small, flagellate branches often present, leaves reduced, ligulate-acute, 1 mm long or less. Dioicous. Perichaetia leaves ovate-subulate. Setae elongate, to 20 mm long, smooth. Capsules horizontal, urn cylindrical, ca. 3 mm long, stomata base; opercula, conic-long rostrate; peristome, with exostome teeth cross-striate at base, becoming striate-papillose, distal 1/4 papillose; endostome papillose, basal membrane high, keeled and perforate, cilia present. Calyptrae unknown. Spores possibly papillose.

 

Plantas grandes hasta bastante robustas, hasta 9 cm de alto, formando manojos laxos alambrinos, bastante rígidos, verde brillantes oscuras hasta negruzcas. Tallos primarios reptantes; hojas escuamiformes, ovado-triangulares, hasta ca. 1.5 mm de largo, a menudo erosionadas desde el tallo, radiculosas. Tallos secundarios frondosos, estípites generalmente alargados, hojas ovado-subuladas. Hojas del tallo laxamente complanadas, erecto-extendidas, ovado- u oblongo-liguladas, 3-3.4 mm de largo, hasta 1.2 mm de ancho, algo plegadas en seco, ± cóncavas, hojas laterales plegadas abajo, ápices anchamente agudos, bases indiferenciadas hasta débilmente auriculadas; márgenes planos o escasamente recurvados en la base, fuerte e irregularmente serrados en 1/3 distales; costa simple, fuerte, ocupando ca. 3/4-4/5 de la longitud de la lámina; células de la lámina romboidal-fusiformes o -hexagonales, 20-40 µm de largo, 6-8 µm de ancho, pared celular gruesa, lisa; células inferiores y basales irregularmente elongado-rectangulares. Hojas de las ramas menores; ramas flageladas a menudo presentes, hojas reducidas, agudo-liguladas, 1 mm de largo o menores. Dioicas. [Periquecios laterales; hojas ovado-subuladas. Setas alargadas, hasta 20 mm de largo, lisas. Cápsulas horizontales, urna cilíndrica, ca. 3 mm de largo; estomas en la base de la urna, superficiales; opérculo largo-cónico rostrado; peristoma doble, exostoma con 16 dientes, estrías cruzadas abajo, distal 1/4 papiloso; endostoma papiloso, membrana basal alta, carinada y perforada, cilios presentes. Caliptra desconocida. Esporas esféricas, posiblemente papilosas.]

 
 
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