Home Andean Bryophytes
Intro
Region
Name Search
Family List
Generic List
Andean Mosses XL database
Schizymenium Harv. 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: Icones Plantarum 3: pl. 202. 1840. (Icon. Pl.) Name publication detailView in BotanicusView in Biodiversity Heritage Library
 

Project Name Data (Last Modified On 11/7/2012)
Acceptance : Accepted
Project Data     (Last Modified On 4/26/2013)
General Reference:

Notes     (Last Modified On 4/26/2013)
Notes:
Schizymenium is estimated to contain 50 or more species. The tropical Andes represent the major center of diversity with about 25 or more species. Eighteen species are recognized for Bolivia, most not well known. Features characterizing the genus include the light green or yellowish brown, soft tufted plants with lanceolate to oblong-lanceolate unbordered leaves with mostly a subpercurrent costa, plane margins and linear to linear-fusiform upper laminal cells, lateral-appearing perichaetia and a single peristome represented by an endostome, or double peristome with exostome reduced and endostome well developed. Species of Schizymenium were previously placed in Mielichhoferia. Much of the distinction between species is based on peristomial features. Collecting sterile specimens is considered unadvisable. For further comments and distinction between Schizymenium and related taxa see comments under Mielichhoferia. The following key to Mielichhoferia and Schizymenium is based on Shaw (1985).
 
1. Plants paroicous, autoicous, rarely synoicous; peristome usually single and endostomial, rarely absent or double; exostome teeth, when present, smooth … Schizymenium
1. Plants dioicous; peristome single and exostomial or double with long exostome teeth and an endostomial membrane not differentiated into segments and cilia; exostome teeth reticulate, papillose or striate … Mielichhoferia
 
Se estima que Schizymenium tiene 50 o más especies. Los Andes tropicales representan el mayor centro de diversidad con ca. 25 especies o más. Dieciocho especies son registradas en Bolivia, la myoría no son bien conocidas. Las características distintivas de este género incluyen el color verde claro o pardo amarillento, plantas en manojos suaves con hojas lanceoladas hasta oblongo-lanceoladas sin borde generalmente con costa subpercurrente, márgenes planos y células superiores de la lámina lineales hasta lineo-fusiformes, periquecios aparentemente laterales y peristoma simple representado un endostoma, o peristoma doble con exostoma reducido y endostoma bien desarrollado. Las especies de Schizymenium fueron localizadas previamente en Mielichhoferia. La diferenciación entre especies se basa en las características del peristoma. Colectar especímenes estériles es poco aconsejable. Para leer más comentarios sobre las diferencias entre Schizymenium y los taxa relacionados ver los comentarios de Mielichhoferia.
 
1. Plantas paroicas, autoicas, raras veces sinoicas; peristoma generalmente simple y sólo representado por el endostoma, rara vez ausente o doble; dientes del exostoma, cuando presentes, lisos … Schizymenium
1. Plantas dioicas; peristoma simple y exostomial o doble con dientes del exostoma largos y la membrana del endostoma no diferenciada en segmentos y cilios; dientes del exostoma reticulados, papilosos o estriados … Mielichhoferia

 

Export To PDF Export To Word

Plants commonly small to occasionally medium sized, forming dense soft tufts, glossy to dull pale green to yellowish brown. Stems erect, several to many branched by innovations; in cross-section central strand present. Leaves erect to erect-spreading, crowded above, distant below, oblong-lanceolate to lanceolate, apex acute to acuminate; margins plane, serrulate to serrate distally; costae single, mostly subpercurrent, rarely excurrent; laminal cells smooth, upper and median cells linear-fusiform or-rhomboidal, mostly thin-walled; basal cells rectangular. Paroicous less often synoicous or dioicous. Perichaetia terminal on stems, but appearing lateral by innovations ("pseudolateral"), leaves smaller than stem leaves. Setae short (equal the seta length) to elongate, often flexuose, smooth. Capsules erect to more commonly inclined to subpendent, symmetric or asymmetric and curved, pyriform or cylindrical-pyriform, neck short to long (to as long as urn); annuli usually well developed; opercula conic or conic-apiculate; peristome single with endostomial basal membrane short to high with 16 segments, smooth or papillose, cilia absent or reduced, or peristome rarely double, exostome teeth 16, often reduced, smooth or papillose, with an endostome somewhat well developed or reduced. Calyptrae cucullate, smooth and naked. Spores spherical, lightly to densely papillose.

 

Plantas comúnmente pequeñas hasta ocasionalmente medianas, formando manojos densos suaves, de color verde pálido brillante a opaco hasta pardo-amarillento. Tallos erectos, poco a muy ramificado por innovaciones; cordón central presente en corte transversal. Hojas erectas a erecto-extendidas, agregadas hacia arriba, distantes hacia abajo, oblongo-lanceoladas a lanceoladas, ápices agudos a acuminados; márgenes planos, distalmente serrulados a serrados; costa simple, generalmente subpercurrente, rara vez excurrente; células de la lámina lisas, células superiores y medias lineo-fusiformes o romboidales, generalmente con paredes delgadas; células basales rectangulares. Paroicas menos a menudo sinoicas o dioicas. Periquecios en la porción terminal de los tallos, pero de apariencia lateral por innovaciones ("pseudolaterales"), hojas menores que las hojas del tallo. Setas cortas (setas de la misma longitud) hasta alargadas, a menudo flexuosas, lisas. Cápsulas erectas a más comúnmente inclinadas hasta subpendientes, simétricas o asimétricas y curvadas, piriformes o cilíndrico-piriformes, cuello corto hasta largo (tan largo como la urna); anillo generalmente bien desarrollado; opérculo cónico o cónico-apiculado; peristoma simple con la membrana basal del endostoma corta o alta con 16 segmentos, lisos o papilosos, cilios ausentes o reducidos, o peristoma rara vez doble, exostoma con 16 dientes, a menudo reducidos, lisos o papilosos, con el endostoma un poco desarrollado o reducido. Caliptra cuculada, lisa y desnuda. Esporas esféricas, finamente hasta densamente papilosas.

 
 
© 2014 Missouri Botanical Garden - 4344 Shaw Boulevard - Saint Louis, Missouri 63110