Didymodon tectorum (Müll.Hal.) K.Saito

Species

Bryophytes > Pottiales > Pottiaceae > Didymodon

Characteristics

Plants green to dark green, without a reddish cast. Stems to 2 cm, central strand present. Stem leaves appressed to weakly spreading when dry, spreading but stiff and not keeled when moist, monomorphic, deltoid to deltoid-lanceolate, grooved adaxially along the costa, especially near leaf apex, 1-1.5(-2) mm, base squared in shape, margins strongly recurved or revolute to near apex of leaf, entire, apex narrowly obtuse, not fragile, commonly ending in a mucro; costa short-excurrent as a several-celled blunt mucro, not strongly spurred, little widened toward apex, little tapering, sometimes rather thick and bulging adaxially, lacking a adaxial thin-walled pad of cells or this poorly developed, adaxial costal cells quadrate to short-rectangular, 4(-6) cells wide at mid leaf, guide cells in 1(-2) layers; basal laminal cells differentiated medially or across the leaf, walls mostly thin, quadrate to short-rectangular, not perforated; distal laminal cells 7-10 µm wide, 1:1, nearly smooth or papillae simple or 2-fid, 2-3 per lumen, lumens quadrate or rounded-quadrate, walls weakly convex on both sides of lamina, distal leaf margins 1-stratose or occasionally 2-stratose in patches. Specialized asexual reproduction by axillary, multicellular gemmae. Seta 0.8-1 cm. Capsule 1.5-2.5 mm; peristome teeth 32, linear, twisted 1/2 to once, to 1300 µm. Spores 11-12 µm. Distal laminal KOH reaction negative or weakly red.
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Foliage retention deciduous
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Identifiers

LSID 35140558
WFO ID wfo-0001169396
COL ID 35YWP
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INPN ID 820108
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Wikipedia (FR)

Synonyms

Barbula tectorum Barbula defossa Didymodon tectorum