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!Sphagnum laxirameum H.A. Crum 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: Contributions from the University of Michigan Herbarium 20: 136. f. 8. 1995. (Contr. Univ. Michigan Herb.) Name publication detailView in BotanicusView in Biodiversity Heritage Library
 

Project Name Data (Last Modified On 10/17/2009)
Acceptance : Accepted
Project Data     (Last Modified On 7/5/2018)
Status: endemic
Plant Category: Mosses
country distribution: Colombia
EcoRegions: Montane Forest
elevation: 3000-3500
substrate: leaf litter / humus
frequency: rare
General Reference:

Notes     (Last Modified On 7/5/2018)
Notes:

Ecology: Secondary montane forest; on wet humic soil. Elevation: 3050 m. Distribution: Endemic to the tropical Andes (Colombia). Assigned to section Acutifolia.

Ecología: Bosque montano secundario; sobre suelo húmico húmedo. Elevación: 3050 m. Distribución: Endémica para los Andes tropicales (Colombia). Asignada a la sección Acutifolia.

Sphagnum laxirameum is distinguished by the weakly developed capitulum, stem and branch leaves of similar shape and size (1.8-2.3 mm), stem leaves narrowly bordered to base, hyaline cells fibrillose and porose in distal half, mostly once divided toward base, inner surface with 1-2 broad, rounded gaps (extending nearly the cell width) in each cell, and finally branch leaves are often cucullate at the apex (Crum 1995).

Sphagnum laxirameum se distingue por los capítulos débilmente desarrollados, hojas de tallos y ramas similares en forma y tamaño (1.8-2.3 mm), hojas del tallo angostamente bordeadas en la base, células hialinas fibrilosas y porosas en la mitad distal, generalmente divididas una vez hacia la base, superficie interna con 1-2 orificios redondeados, anchos, (extendiéndose casi todo el ancho de la célula) en cada célula, y finalmente hojas de las ramas frecuentemente son cuculadas en el ápice (Crum 1995).


 

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Plants pale-green, elongate and slender, to 16 cm, capitulum small. Stem cortical cells elongate, some uniporose on distal ends, wood cylinder yellowish. Stem leaves oblong-ovate to ovate-short lanceolate, 2-2.3 mm, concave, margins narrowly bordered, border not expanded at base; hyaline cells fibrillose in the upper 1/2 to 2/3, mostly 1-divided toward base, on the outer surface with 1-5 rounded-elliptic, thin-margined pores at commissures and angles, inner surface with 1-2 round, pore-like gaps, toward the apex in the lower half with rounded gaps nearly the cell width, 1-2 per cell or cell compartment. Branches in fascicules of 3 (1 pendent). Branch leaves not ranked, somewhat spreading when dry, ovate-lanceolate to –oblong, 1.8-2 mm, concave, apex often hooded, margins narrowly bordered; hyaline cells on the outer surface with numerous narrowly elliptic, somewhat ringed commissural pores, inner surface with pores absent or very few, rounded, and thin-margined; in cross-section green cells broadly triangular, exposed exclusively or more broadly on the inner surface, hyaline cells somewhat convex on the inner surface, bulging on the outer. Crum 1995.

Plantas verde pálidas, alargadas y delgadas, hasta 16 cm, capítulo pequeño. Tallo con  células corticales alargadas, algunas uniporosas en los extremos distales, cilindro leñoso amarillento. Hojas del tallo oblongo-ovadas a corto-ovadas lanceoladas, 2-2.3 mm, cóncavas, márgenes angostamente bordeados, borde no expandido en la base; células hialino fibrilosas en 1/2 a 2/3 superiores, generalmente 1-divididas hacia la base, superficie externa con 1-5 poros redondeado-elípticos, con bordes delgados, en las comisuras y ángulos, superficie interna con 1-2 orificios similares a poros redondeados, hacia el ápice en la mitad inferior con orificios redondeados casi del ancho de la célula, 1-2 por célula o fragmento de célula. Ramas en fascículos de 3 (1 pendiente). Hojas de la rama no en filas, algo patentes en seco, ovado-lanceoladas a –oblongas, 1.8-2 mm, cóncavas, ápices frecuentemente encapuchados, márgenes angostamente bordeados; células hialinas en la superficie externa con numerosos poros comisurales estrechamente elípticos, algo anulados, superficie interna sin poros o muy pocos, redondeados y con bordes delgados; en corte transversal células verde anchamente triangulares, expuestas exclusivamente o más ampliamente en la superficie interna, células hialinas algo convexas en la superficie interna, abultadas en la superficie externa. Crum 1995.

 


 

 
 
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