Grimmia orbicularis Bruch

Orb dry rock moss (en)

Species

Bryophytes > Grimmiales > Grimmiaceae > Grimmia

Characteristics

Plants in hoary, usually hemispherical cushions, grayish green. Stem 2-5 cm, central strand present. Leaves appressed and twisted when dry, erect when moist, broadly lanceolate, abruptly contracted into awn, 2-2.5 × 0.4-0.6 mm, keeled, margins recurved in the middle of the leaf on one or both sides, awns short to long, smooth to denticulate, costa weak proximally, projecting on abaxial side; basal juxtacostal laminal cells short-to long-rectangular, sinuose-nodulose, thick-walled; basal marginal laminal cells short-to long-rectangular, straight, with thickened transverse walls; medial laminal cells subquadrate, sinuose, thick-walled; distal laminal cells 1-stratose. Gemmae absent. Sexual condition autoicous. Seta arcuate, 2-3 mm. Capsule usually present, exserted, bent down into the cushions by the arcuate setae, yellowish brown to chestnut brown, globose to ovoid, smooth to weakly ribbed, when dry and empty wide-mouthed, exothecial cells thin-walled, annulus present, operculum mammillate, peristome teeth orange, broad, cribrose and irregularly cleft at apex. Calyptra cucullate.
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Images

Grimmia orbicularis unspecified picture

Identifiers

LSID 35147126
WFO ID wfo-0001173714
COL ID 6KT2G
BDTFX ID -
INPN ID 5547
Wikipedia (EN)
Wikipedia (FR)

Synonyms

Grimmia obovata Grimmia orbicularis Grimmia rotunda Grimmia mammillaris Grimmia orbicularis var. persica