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!Donnellia commutata (Müll. Hal.) W.R. Buck Search in The Plant ListSearch in NYBG Virtual HerbariumSearch in Muséum national d'Histoire naturelleSearch in Type Specimen Register of the U.S. National HerbariumSearch in Virtual Herbaria AustriaSearch in JSTOR Plant ScienceSearch in SEINetSearch in African Plants Database at Geneva Botanical GardenAfrican Plants, Senckenberg Photo GallerySearch in Flora do Brasil 2020Search in Reflora - Virtual HerbariumSearch in Living Collections Decrease font Increase font Restore font
 

Published In: The Bryologist 91(2): 134. 1988. (Bryologist) Name publication detail
 

Project Name Data (Last Modified On 5/7/2009)
Acceptance : Accepted
Project Data     (Last Modified On 10/31/2017)
Plant Category: Moss
EcoRegions: Amazon, Yungas montane forest
Elevation: 0-500, 500-1000, 1000-1500
Substrate: logs, treelets and trees
Frequency: rare

Notes     (Last Modified On 10/31/2017)
general taxon notes:
Ecology. Amazon forest to lower Yungas montane forest; epiphytic on logs, trunk and branches of treelets and trees (including Bertholletia excelsa). Elevation. 180-1500 m. Distribution. Bolivia: La Paz, Pando. World range: Infrequent but widespread in the Neotropics.
 
Ecología. Bosque amazónico a bosque montano inferior de Yungas; sitios sombreados, sobre troncos en descomposición, troncos y ramas de arbolitos y árboles (incluyendo a Bertholletia excelsa). Altitud. 180-1500 m. Distribución. Bolivia: La Paz, Pando. Distribución mundial: Poco frecuente pero amplia distribución en el Neotrópico.
 
Donnellia commutata is characterized by the homomallous arranged leafy plants, erect-spreading, ovate- to oblong-lanceolate leaves, slighty biplicate base, gradually acuminate, bluntly rounded apex; reflexed margin on one or both sides, entire, absence of a costa, smooth, thick-walled rhomboidal-rounded median cells, golden insertion cells subquadrate to short oblong, little inflated alar cells in 1-2 rows, short seta (ca. 2.2 mm), hyaline, blunt, trabeculate exostome, plate walls prominent on both surfaces, short endostome basal membrane, and narrow, weakly keeled, lightly papillose, segments. Given the rather geographical extemes in the only known two collections of this species in Bolivia it is likely to prove more widespread and common than presently known.
 
Donnellia commutata se caracteriza por las disposición homomala de las hojas de las plantas, hojas erecto-extendidas, ovado- a oblongo-lanceoladas, ligeramente biplicadas en la base, gradualmente acuminadas, ápice obtusamente redondeados; margen reflexo sobre uno o ambos lados, enteros, sin costa, lisos, células mediales con paredes gruesas rhomboidal-redondeadas, células de la inserción doradas subcuadradas a corto oblongas, células alar poco infladas en 1-2 filas, seta corta (ca. 2.2 de mm), hialina, obtusa, exostoma trabeculado, paredes prominentes sobre ambas superficies, membrana basal del endostoma corta, y segmentos angostos, débilmente carinados y ligeramente papilosos. Dados los extremos geográficos de las dos únicas colecciones de esta especie en Bolivia, es probable que sea más común y ampliamente distribuida de lo que se conoce actualmente.

 

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Plants small, forming tufts or mats, glossy green to yellowish. Stems spreading to subascending; central strand absent; radiculose beneath, rhizoid clustered. Leaves often homomallous, erect-spreading, ovate- to oblong-lanceolate, 0.5-1.4 mm long, to 0.45 mm wide, concave, weakly biplicate at base, apex gradually acuminate, bluntly rounded; margins plane above, at base reflexed on one or both sides, entire; costae absent; median cells rhomboidal-rounded, 30-42 µm long, ca. 8 µm wide, smooth, thick-walled; basal cells weakly porose; insertion cells golden; alar region differentiated, cells subquadrate to short oblong, little inflated, in 1-2 rows, golden-yellow. Autoicous. Perigonia bud-like; leaves ovate acute. Perichaetia lateral; leaves similar. Setae rather short, ca. 2.2 mm long, erect to somewhat flexuose, smooth. Capsules erect to suberect, urn obloid to ovoid-cylindrical, 1-1.2 mm long, constricted below mouth when dry and deoperculate; exothecial cells 30-60 µm long, 20-30 µm wide, collenchymatous; stomata several at urn base, superficial; opercula conic long rostrate; peristome double, exostome teeth 16, to at least 250 µm long, hyaline, blunt, trabeculate, plate walls prominent on both surfaces; endostome basal membrane short, segments narrow, weakly keeled, lightly papillose, fragile and readily deciduous. Calyptrae not observed. Spores spherical to ovoid, 22-30 µm in diameter, lightly papillose.
 
Plantas pequeñas, formando manojos o matas, verdes brillantes a amarillentas. Tallos patentes a subascendentes; cordón central ausente; radiculosos abajo, rizoides agregados. Hojas a menudo homomalas, erecto-extendidas, ovado- a oblongo-lanceoladas, 0.5-1.4 mm de largo, a 0.45 mm de ancho, cóncavas, débilmente biplicadas en la base, ápices gradualmente acuminados, obtusamente redondeados; márgenes planos arriba, en la base reflexos sobre uno o ambos lados, enteros; sin costa; células mediales romboidal-redondadas, 30-42 µm de largo, ca. 8 µm de ancho, lisas, con paredes gruesas; células basales débilmente porosas; células de la inserción doradas; región alar diferenciada, células subcuadradas a corto oblongas, poco infladas, en 1-2 filas, amarillo-doradas. Autoicas. Perigonios en forma de brote; hojas ovadas agudas. Periquecios laterales; hojas similares. Setas bastante cortas, ca. 2.2 mm de largo, erectas a algo flexuosas, lisas. Cápsulas erectas a suberectas, urna obloide a ovoide-cilíndrica, 1-1.2 mm de largo, constrictas en la base de la boca cuando están secas y desoperculadas; células exoteciales de 30-60 µm de largo, 20-30 µm de ancho, colenquimatosas; varios estomas en la base de la urna, superficiales; opérculo cónico largo rostrado; peristoma doble, exostoma con 16 dientes, por lo menos de 250 µm de largo, hialinos, obtusos, trabeculados, {plate} paredes prominentes sobre ambas superficies; membrana basal del endostoma corta, segmentos angostos, débilmente carinados, ligeramente papilosos, frágiles y rápidamente caducos. Caliptra no observada. Esporas esféricas a ovoides, 22-30 µm de diámetro, ligeramente papilosas.
 
 


 

 
 
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