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Published In: Revue Bryologique, nouvelle série 1: 193. 1928. (Rev. Bryol., n.s.) Name publication detail

Project Name Data (Last Modified On 12/1/2009)
Acceptance : Accepted
Project Data     (Last Modified On 10/29/2017)
Plant Category: Moss
EcoRegions: Puna
Elevation: 3000-3500
Substrate: rocks
Frequency: rare

Notes     (Last Modified On 10/29/2017)
general taxon notes:
Ecology. Dry or semi-humid puna; on rocks. Elevation. 3300 m (Punutuma, 20°03×S, 66°07×W). Distribution. Bolivia: World range: widespread in central and southwest United States, northern Mexico and disjunct to central northern Asia.
Ecología. Puna seca o semi-húmeda; sitios expuestos hasta sombreados, sobre rocas. Altitud. 3300 m (Punutuma, 20°03×S, 66°07×W). Distribución. Bolivia: Distribución mundial: amplia distribución en centro y sureste de Unido Estados, norte de México y disjunto en el centro norte de Asia.
Jaffueliobryum marginatum Thér., collected by Monge from Punutama, is a synonym. Jaffueliobryum williamsii (Deguchi) Delgad. from Peru (Delgadillo 2000) may be found in Bolivia, it differs from J. wrightii by the percurrent to short excurrent costa, flat hair point, and partially bistratose lamina.


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Plants somewhat small to medium sized, forming loose to more commonly dense cushions. Stems erect, to ca. 10 mm tall, few branched by innovations; in cross-section outer 1-3 rows of cells small, thick-walled, inner cells large, thin-walled, central strand present. Leaves crowded, appressed when dry, erect to erect-spreading when wet, oval, obovate to oblong-obovate, 0.6-1.3 mm long (excluding hair point), concave, apex obtuse-rounded; margins plane, entire to serrate or erose near juncture with costa; costa excurrent as a short to long hair point, often equal to or longer than leaf lamina; lamina unistratose; median cells oval to oblong-oval or irregular to regular quadrate, hexagonal or rectangular; basal cells quadrate to somewhat rectangular, rather lax and thin-walled; marginal cells elongate and hyaline, or quadrate to short rectangular and smaller than inner cells. Autoicous or cryptoiocus. Perichaetial leaves similar but larger. Setae short (0.3 mm) to somewhat elongate (to 1.25 mm), smooth. Capsules immersed to short exserted, erect, ovoid, to 1 mm long; stomata at base or lower 1/3 of urn, superficial; annulus revoluble or persistent; operculum short to long rostrate; peristome teeth usually divided into 3 variously fused segments or simply perforate, spiculose. Calyptrae mitrate-campanulate, base erose or deeply lobed. Spores spherical, granulate or ruminate.


Plantas algo pequeñas hasta medianas, formando cojines laxos a más comúnmente densos. Tallos erectos, de ca. 10 mm de alto, poco ramificados por innovaciones; en corte transversal 1-3 filas externas de células pequeñas, con paredes gruesas, células internas grandes, con paredes delgadas, cordón central presente. Hojas agregadas, adpresas en seco, erectas hasta erecto-extendidas en húmedo, ovales, obovadas hasta oblongo-obovadas, 0.6-1.3 mm de largo (excluyendo el tricoma), cóncavas, ápices obtuso-rotundos; márgenes planos, enteros hasta serrados o erosionados cerca a la unión con la costa; costa excurrente como un tricoma largo hasta corto, a menudo igual o más largo que la lámina de la hoja; lámina uniestratificada; células mediales ovales a oblongo-ovales o cuadradas irregulares hasta regulares, hexagonales o rectangulares; células basales cuadradas hasta algo rectangulares, bastante laxas y de paredes delgadas; células del margen alargadas y hialinas, o cuadradas hasta corto-rectangulares y menores que las células internas. Autoicas o criptoicas. Hojas periqueciales similares pero mayores. Setas cortas (0.3 mm) hasta alargadas (hasta 1.25 mm), lisas. Cápsulas inmersas hasta corto-excertas, erectas, ovoides, hasta 1 mm de largo; estomas en la base o 1/3 inferior de la urna, superficiales; anillo revoluble o persistente; opérculo corto- hasta largo-rostrado; peristoma con dientes generalmente partidos en 3 segmentos diversamente fundidos o con perforaciones simples, espiculados. Caliptra mitrada-campanulada, base erosionada o profundamente lobada. Esporas esféricas, granuladas o ruminadas.



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