Polytrichum swartzii Hartm.

Swartz's polytrichum moss (en)

Species

Bryophytes > Polytrichales > Polytrichaceae > Polytrichum

Characteristics

Plants often rather soft and flexuose, green to blackish when old. Stems 2-9 cm, simple, erect, in proximal part moderately to densely brownish tomentose. Leaves 3-8 mm, loosely imbricate, appressed to erect-spreading and flexuose when dry, patent to widely spreading and weakly recurved when moist; sheath rectangular, scarcely narrowed to the blade; blade lanceolate to linear-lanceolate, often caducous at the junction of sheath and blade, the apex subulate, weakly channeled; marginal lamina 6-9 cells wide, distantly toothed to subentire; costa excurrent as short brown entire to serrulate tip, smooth abaxially or with a few teeth near apex; lamellae in profile entire to shallowly crenulate, 5-10 cells high, the marginal cells in section usually somewhat broadened, flat-topped or shallowly grooved, single or geminate, thin-walled, smooth, the marginal cells of lateral lamellae asymmetric; median sheath cells 75-110 × 2-12 µm, linear; cells of marginal lamina 9-15 µm, quadrate, thin-to firm-walled; perichaetial leaves with long sheathing bases and short subulate blade. Seta 2.5-5 cm, reddish brown. Capsule 2.5-3 cm, ± cubic, sharply 4-angled, suberect when mature, becoming horizontal when old; peristome teeth 64, 160-210 µm, obtuse, the basal portion 60-75 µm. Spores 12-15 µm.
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Identifiers

LSID 35141907
WFO ID wfo-0001170327
COL ID 4LPRP
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Wikipedia (EN)
Wikipedia (FR)

Synonyms

Polytrichum algidum Polytrichum inconstans Polytrichum swartzii Polytrichum commune var. nigrescens Polytrichum commune var. swartzii