Homalothecium arenarium (Lesq.) E.Lawton

Sandwort homalothecium moss (en)

Species

Bryophytes > Hookeriales > Brachytheciaceae > Homalothecium

Characteristics

Plants medium-sized, in loose to moderately dense tufts, light green to pale yellowish. Stems to 5 cm, irregularly branched, branches 5-10 mm, ± ascending. Stem leaves appressed when dry, narrowly ovate-triangular, 1.5-2 × 0.5-0.7 mm; base slightly narrowed, broadly short-decurrent; margins plane or often recurved at places, subentire to serrulate proximally, serrulate to serrate distally; apex gradually tapered or short-acuminate; costa to 70-100% leaf length, terminal spine absent or more rarely sharp and distinct; alar cells subquadrate or ovate, 10-18(-35) × 9-13 µm, region extending along margins in 8-15 rows; laminal cells linear-flexuose, 30-75 × 4-6 µm; basal cells irregularly isodiametric, region in 5-8 rows, conspicuous across base, broad throughout or near costa and margins. Branch leaves appressed when dry or moist, lanceolate, 0.6-1.5 × 0.3-0.5 mm; margins plane to recurved throughout, serrulate to serrate distally; apex acuminate to acute; costa to 70-95% leaf length, terminal spine present, toothed abaxially near its end; alar cells subquadrate, 6-10 µm, indistinctly delimited from basal region; laminal cells linear-flexuose, 50-90 × 5-6 µm; basal cells in 3-7 rows; distal cells prorate on abaxial surface. Sexual condition dioicous. Seta 1-1.5 cm, rough. Capsule inclined to horizontal, subcylindric, curved, 1.5-2 mm; annulus separating by fragments; operculum conic; peristome xerocastique, perfect; exostome teeth transverse-striolate proximally, with short transitional zone; endostome basal membrane 1/3 endostome height, segments as long as exostome teeth, broad, cilia 1 or 2, slightly shorter than segments. Spores 11-14 µm.
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Identifiers

LSID 35141321
WFO ID wfo-0001169971
COL ID 6MBSR
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Wikipedia (EN)
Wikipedia (FR)

Synonyms

Hypnum arenarium Homalothecium arenarium Camptothecium alsioides