Overview

Distribution

National Distribution

Canada

Origin: Unknown/Undetermined

Regularity: Regularly occurring

Currently: Unknown/Undetermined

Confidence: Confident

United States

Origin: Unknown/Undetermined

Regularity: Regularly occurring

Currently: Unknown/Undetermined

Confidence: Confident

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Physical Description

Morphology

Description

Plants ± moderate-sized, capitula flat-topped and stellate to some-what hemispherical; variegated pale yellowish and red, sometimes partially green or completely red; without metallic lustre when dry. Stems pale yellow to red; superficial cortical cells aporose. Stem leaves narrowly lingulate-triangular, 1.2-1.8 mm, apex acute to apiculate, border not developed much along margins and narrow at base (occupying less than 0.25 the width of the base); hyaline cells rhombic, mostly 0-1-septate. Branches usually strongly 5-ranked. Branch fascicles with 2 spreading and 1-2 pendent branches. Branch leaves narrowly ovate-lanceolate, 1.2-1.5 mm, concave, straight, apex strongly involute, border entire, hyaline cells on convex surface with 3-9 faintly ringed rounded-elliptic pores along the commissures often quite small apically, largely aporose on concave surface. Sexual condition dioicous. Spores 19-28 µm; coarsely papillose on both surfaces with a distinct ridged border around perimeter of proximal surface; proximal laesura less than 0.5 spore radius.
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Diagnostic Description

Synonym

Sphagnum bartlettianum var. roseum Warnstorf
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Conservation

Conservation Status

National NatureServe Conservation Status

Canada

Rounded National Status Rank: NNR - Unranked

United States

Rounded National Status Rank: NNR - Unranked

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NatureServe Conservation Status

Rounded Global Status Rank: G4 - Apparently Secure

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Notes

Comments

Sporophytes are not common in Sphagnum bartlettianum. Confusion is most likely with S. rubellum, with which it frequently co-occurs in the northern part of its range. The ecology is poorly understood due to taxonomic confusion with S. rubellum; the latter species, however, is more typical of boreal poor fens and bogs. Sphagnum bartlettianum has a narrower stem leaf with a distinctly pointed and even apiculate tip, whereas the stem leaf on S. rubellum is quite rounded. The branch leaves of S. bartlettianum are also narrower than those of S. rubellum and are never subsecund as in the latter. Sphagnum quinquefarium has shorter and wider stem leaves as well as often having 3 spreading branches per fascicle. Sphagnum wilfii can appear quite similar and it does overlap the range of S. bartlettianum in coastal British Columbia and southeastern Alaska. Sphagnum wilfii has a stem leaf that is triangular to triangular-lingulate in contrast to the narrowly lingulate-triangular stem leaf of S. bartlettianum.
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