Home Moss Flora of China
Name Search
About
Moss Checklist
Moss Flora
Guide to Authors
Participants
Glossary
Grimmiaceae Arn. Search in NYBG Virtual Herbarium Decrease font Increase font Restore font
 

Published In: Disposition Méthodique des Espèces de Mousses 19. 1825. (Disp. Méth. Mousses) Name publication detail
 

Project Name Data (Last Modified On 2/20/2009)
Acceptance : Accepted
Project Data     (Last Modified On 3/16/2009)
General Reference:

Notes     (Last Modified On 3/16/2009)
general taxon notes:

The Grimmiaceae have traditionally been placed in the monotypic order, Grimmiales. According to Vitt (1984) the family consists of 12 genera in the world, of which 6 genera are recorded in China. The Chinese species of the Grimmiaceae are mostly distributed in the cold-temperate regions as well as in the high mountains of the southern, subtropical provinces. Most species of the Grimmiaceae are drought-resistant mosses and usually grow on bare rocks in very dry habitats.


 

Export To PDF Export To Word

 

GRIMMIACEAE
紫萼藓科   zi-e xian ke
by Cao Tong, Si He, and Dale H. Vitt
 
Plants small to rather robust, yellowish green to dark-green, brown or blackish below, in dense cushions or dense to loose tufts. Stems erect or prostrate, forked or moderately branched from innovations, sometimes fasciculately branched or shortly tuft-like laterally branched, rhizoids often present at the base; with or without central strand in transverse section. Leaves in many rows, imbricate, erect or somewhat contorted to occasionally crisped when dry, erect-spreading to wide-spreading when moist, mostly lanceolate to sometimes narrowly lanceolate, rarely oblong-ovate or ovate, keeled or concave, acute at apex, often muticous or ending in a hyaline hair-point; margins recurved, plane or slightly incurved, often bistratose above; costa strong, single, percurrent, subpercurrent or ending below the leaf apex; upper cells small, rounded-quadrate to irregularly short-rectangular, usually obscure, unistratose or usually bistratose to 3–4-stratose toward the apex, smooth, sometimes papillose, thick-walled, the cell walls sometimes sinuose or nodulose; lower cells near margins subquadrate, quadrate to rectangular, thinner-walled or with transverse walls thicker than the longitudinal ones, juxtacostal cells elongate, with walls straight or often somewhat to strongly sinuose or nodulose. Autoicous or dioicous. Perichaetial leaves similar to vegetative leaves, but larger, loosely areolate or differentiated with membranous and pallid margins. Setae terminal or lateral, straight or arcuate, short or elongate, sometimes shorter than the urn; capsules erect or horizontal to pendent, immersed to long-exserted, obovoid, subglobose to oblong-ovoid or cylindrical, smooth to ribbed; exothecial cells mostly elongate-hexagonal, thin-walled; stomata sometimes present at base of urns; annuli usually present, sometimes absent, consisting of quadrate to shortly rectangular cells with thick walls; opercula conic or convex, with short or long, erect to somewhat oblique beak or without a beak; columella sometimes persistent, not falling with opercula; peristome single, with 16 red-brown to yellowish brown teeth, erect, lanceolate to linear-lanceolate, entire or imperfectly perforate and split above, papillose on both the outer and inner surface, the peristome teeth sometimes reduced or absent. Calyptrae small, covering upper portion of urns, sometimes large, covering most of the urns (campanulate), usually mitrate or cucullate, smooth or sometimes plicate. Spores small, 7–16 µm in diameter, green to yellowish green, smooth to more or less granulose or papillose.

 

 

Export To PDF Export To Word

 

1. Calyptrae large, campanulate, covering most of the urn, longitudinally plicate; plants tiny to small; costa plane on the leaf surface.............2
1. Calyptrae small, mitrate or cucullate, hardly reaching the urn or slightly covering the urn, smooth; plants medium-sized to rather robust; costa convex on the leaf surface ....................................................................... 4
2. Leaves sheathing at the base, strongly inrolled in upper part, muticous at the apex................... 3. Indusiella
2. Leaves nearly plane throughout, hyaline and long hair-pointed at the apex..................................................... 3
3. Leaves lanceolate, plicate on both sides of costa; plants tiny, not glossy................................... 1. Coscinodon
3. Leaves ovate, smooth on both sides of costa; plants small, julaceous, glossy...................... 4. Jaffueliobryum
4. Plants cladocarpous; stems prostrate, often with multiple short branches; basal leaf cells elongate or linear, with strongly sinuose and nodulose lateral walls; capsules lateral; peristome teeth deeply divided to the base; basal membrane high............................................................5. Racomitrium
4. Plants acrocarpous; stems erect, often with forked branches; basal leaf cells quadrate to rectangular with straight or sinuose lateral walls; capsules terminal; peristome teeth undivided or only divided above; basal membrane absent .............................................................................5
5. Opercula falling separated from columella; calyptrae relatively large, covering opercula and a part of the urn; annuli mostly present (except G. montana, G. reflexidens)....................................................... 2. Grimmia
5. Opercula falling attached with columella; calyptrae relatively small, covering only a part of the opercula; annuli absent ........................6. Schistidium
 
 
© 2014 Missouri Botanical Garden - 4344 Shaw Boulevard - Saint Louis, Missouri 63110