Dicranum acutifolium (Lindb. & Arnell) C.E.O.Jensen

Acuteleaf dicranum moss (en)

Species

Bryophytes > Dicranales > Dicranaceae > Dicranum

Characteristics

Plants in dense to loose tufts, light green to light brown, dull. Stems 1.5-7 cm, generally branched above, somewhat tomentose with reddish brown rhizoids. Leaves erect-spreading, slightly curled to ± straight when dry, usually with a few undulations in distal part, (3.5-)5-8(-10) mm × 0.5-1 mm, concave below, keeled above, sometimes margins ± involute, lanceolate, narrowly acute to acuminate; margins serrulate to serrate above; laminae 1-stratose or with few 2-stratose regions on or near the distal margins; costa percurrent to shortly excurrent, 1/6-1/4 the width of the leaves at base, smooth to slightly papillose above on abaxial surface, abaxial ridges absent, with a row of guide cells, two stereid bands extending to the apex, adaxial epidermal layer of cells not differentiated, the abaxial layer differentiated; cell walls between lamina cells not or slightly bulging; leaf cells smooth to weakly papillose above on abaxial surface; alar cells 2-stratose, differentiated, often extending to costa; proximal laminal cells linear-rectangular, pitted, (22-)41-60(-90) × (5-)6-8(-12) µm; distal laminal cells short-rectangular, irregularly angled or rounded, not pitted, (7-)12-20(-32) × (4-)8-9(-14) µm. Sexual condition pseudomonoicous; dwarf males on stem rhizoids of female plants; interior perichaetial leaves abruptly short-acuminate, convolute-sheathing. Seta 1.2-2.5 cm, solitary, yellow to reddish yellow. Capsule 2-2.7 mm, arcuate, inclined to horizontal, furrowed when dry, rarely slightly strumose, brown to reddish brown; operculum 1.5-2.5 mm. Spores 14-28 µm.
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Identifiers

LSID 35121837
WFO ID wfo-0001159066
COL ID 35TKF
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INPN ID 434123
Wikipedia (EN)
Wikipedia (FR)

Synonyms

Dicranum acutifolium Dicranum bergeri subsp. rupincola Dicranum bergeri var. acutifolium