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Ectropothecium Mitt. 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: Journal of the Linnean Society, Botany 10: 180. 1868. (J. Linn. Soc., Bot.) Name publication detailView in BotanicusView in Biodiversity Heritage Library
 

Project Name Data (Last Modified On 9/18/2009)
Acceptance : Accepted
Notes     (Last Modified On 5/1/2013)
Notes:
Ectropothecium is a pantropical genus stated to contain over 200 species with the primary diversity concentrated in tropical Asia. About five species recorded for the Neotropics, but only E. leptochaeton is common. In the tropical Andes found in wet lowland to high montane forest; on soil, humus, and logs. The genus is in need of a worldwide revision. It may very well be that all the taxa listed under “status unknown” are equivalent to E. leptochaeton. Ectropothecium leptochaeton may be confused with Pylaisiella or even the falcate-secund Sematophyllum species, but these genera exhibit differentiated dark yellow or golden or reddish alar cells, and usually elongate capsules.
 
Ectropothecium es un género pantropical que contiene más de 200 especies con mayor diversidad en Asia tropical; ca. cinco especies han sido registradas en el Neotrópico. En los Andes tropicales se lo encuentra en tierras bajas húmedas hasta bosque montano alto; sobre suelo, humus y troncos en descomposición. Sólo una especie fue registrada, E. leptochaeton (Schwägr.) W. R. Buck
 
Status unknown:
 
Ectropothecium aeruginosum (Müll. Hal.) Mitt., J. Linn. Soc., Bot. 12: 513. 1869. Hypnum aeruginosum Müll. Hal., Syn. Musc. Frond. 2: 304. 1851. Type: Venezuela. Prov. Caracas, Galipan, alt. 5000, terrestre, Dr. Karsten, dein Funck et Schlim in Coll. Linden No. 347. This name has been used widely in the Neotropics and is likely a synonym of E. leptochaeton.
 
Ectropothecium cupressoides (Müll. Hal.) Mitt., J. Linn. Soc., Bot. 12: 511. 1869. Hypnum cupressoides Müll. Hal., Bot. Zeitung (Berlin) 2: 741. 1844. Type: ? Reported for Venezuela.
 
Ectropothecium effusum Herzog, Biblioth. Bot. 88: 22. 1920. Type: Bolivia. Über Laub und gefallenen Ästen im Bergwald des Sillar, ca. 1600 m, Herzog 2693.
 
Ectropothecium latifolium (Taylor) A. Jaeger, Ber. Thätigk. St. Gallischen Naturwiss Ges. 1877-78: 258 (Gen. Sp. Musc. 2: 522). 1880. Hypnum latifolium Taylor, London J. Bot. 7: 196. 1848. Type: Ecuador. On soil, with Hookeria parvifolia Tayl., Puerto del Napo, Villavicensio [ex Jameson]. A likely synonym of E. leptochaeton.

 

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Plants medium sized, forming mats, glossy light green to yellowish-green. Stems spreading, irregularly to regularly pinnately short branched; in cross-section outer 2-3 rows of cells small, thick-walled, inner cells larger, ± thin-walled, firm, central strand weak; pseudoparaphyllia foliose, linear-lanceolate. Stem leaves weakly to strongly falcate-secund, narrowly to broadly ovate-lanceolate, apex short to long acuminate; margins plane to reflexed, distally serrulate to serrate; costae absent or short and forked; laminal cells smooth, median cells linear; basal cells shorter and broader, narrowly oblong, porose; basal marginal cells few, quadrate to short rectangular. Branch leaves smaller, ovate- to oblong-lanceolate or lanceolate-subulate, weakly to strongly falcate-secund, occasionally circinate. Autoicous. Perichaetia lateral; leaves differentiated, ovate-oblong and abruptly long acuminate to subulate. Seta elongate, slender, smooth. Capsule inclined or pendulous, urn ovoid, strongly constricted below mouth when deoperculate; exothecial cells quadrate-rounded to shortly oblong, thin-walled, weakly collenchymatous; stomata few at urn base, superficial; annuli present; operculum mammillate; peristome double, exostome teeth 16, finely cross-striate, median line zig-zag, distally papillose; endostome basal membrane high, segments 16, papillose, cilia 1-2. Calyptra cucullate, smooth and naked. Spores spherical, lightly papillose.

 

Plantas medianas, formando matas, verde claras brillantes hasta verde-amarillentas. Tallos patentes, ramificaciones cortas irregularmente hasta regularmente pinnadas; en corte transversal 2-3 filas externas de células pequeñas, con paredes gruesas, células internas mayores, con paredes ± delgadas, firmes, cordón central débil; pseudoparáfilos foliosos, lineo-lanceolados. Hojas de los tallos débil hasta marcadamente falcado-secundas, angostamente hasta anchamente ovado-lanceoladas, ápices cortos hasta largo-acuminados; márgenes planos hasta reflexos, distalmente serrulados hasta serrados; costa ausente o corta y bifurcada; células de la lámina lisas, células mediales lineales; células basales cortas y más anchas, angostamente oblongas, porosas; pocas células basales del margen, cuadradas hasta corto-rectangulares. Hojas de las ramas menores, ovado- hasta oblongo-lanceoladas o lanceolado-subuladas, débilmente hasta marcadamente falcado-secundas, ocasionalmente circinadas. Autoicas. Periquecios laterales; hojas diferenciadas, ovado-oblongas y abruptamente largo-acuminadas hasta subuladas. Setas alargadas, delgadas, lisas. Cápsulas inclinadas o péndulas, urna ovoide, marcadamente constricta debajo la boca cuando está desoperculadas; células exoteciales cuadrado-redondeadas hasta brevemente oblongas, paredes celulares delgadas, débilmente colenquimatosas; pocos estomas en la base de la urna, superficiales; anillo presente; opérculo mamilífero; peristoma doble, exostoma con 16 dientes, estrías finamente cruzadas, con líneas en zig-zag al medio, distalmente papilosos; membrana basal del endostoma alta, 16 segmentos, papilosos, 1-2 cilios. Caliptra cuculada, lisa y desnuda. Esporas esféricas, finamente papilosas.

 

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1. Branch leaves straight to weakly falcate, rather broadly ovate- to oblong-short lanceolate, apices mostly shorter and broadly acuminate … E. campanulatum
1. Branch leaves usually strongly falcate, narrowly ovate- to oblong-lanceolate, apices long acuminate … E. leptochaeton
 
1. Hojas de las ramas rectas a levemente falcadas, algo anchamente ovado- a oblongo-corto lanceoladas, ápices mayormente más cortos y anchamente acuminados … E. campanulatum

1. Hojas de las ramas usualmente fuertemente falcadas, angostamente ovado- a oblongo-lanceoladas, ápices largo-acuminados … E. leptochaeton 

 
 
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