Sphagnum flavicomans |
Sphagnum sitchense |
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sphagnum |
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Habit | Plants normally robust, sometimes moderate-sized, stiff and erect, capitulum large and typically hemispherical, usually deep reddish brown, frequently with a faint metallic purplish sheen when dry. | Plants moderate-sized; capitulum flat-topped and dense; pale yellow and pink, lacking sheen. |
Stem(s) | leaves narrowly triangular-lingulate, 1.5–2 mm, apex right-angled to apiculate, border moderately strong and greatly broadened at the base (more than 0.25 width); hyaline cells rhombic, 0–1-septate, normally fibrillose near apex. |
pink, superficial cortical cells aporose.; stem leaves narrowly triangular to lingulate- triangular, 1.2–1.6 × 0.6–0.8 mm, length: width ratio ca. 2:1, apex apiculate, border strong and moderately broadened basally; hyaline cells narrowly rhomboid and 1 to occasionally 2 septate, often fibrillose apically. |
Branches | not 5-ranked, terete, long and tapering. |
not 5-ranked. |
Branch leaves | ovate-lanceolate, 1.5–2.3 mm, straight, concave, apex strongly involute; margins entire; hyaline cells on convex surface with elliptic pores along the commissures, grading from moderate-sized pores near leaf apex to large pores at leaf base, concave surface with large round pores in proximal marginal regions of leaf. |
1.3–1.5 × 0.5–0.55 mm, ovate-lanceolate, concave, straight, apex involute; hyaline cells on convex surface with numerous round to elliptic pores along the commissures, grading from large elliptical pores at the base to moderate-sized round pores at the apex, concave surface with a few large round pores scattered throughout. |
Sexual condition | dioicous. |
unknown. |
Spores | 27–32 µm, finely papillose on both surfaces; proximal laesura less than 0.5 spore radius. |
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Branch | fascicles with 2 spreading and 1–2 pendent branches. |
fascicles with 2 spreading and 1 pendent branch. |
Sphagnum flavicomans |
Sphagnum sitchense |
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Phenology | Capsules mature early to mid summer. | |
Habitat | Ombrotrophic to weakly minerotrophic and hygrophytic, forming hummocks on margins of ponds and in poor fens where some shade is available and carpets in wet forests along coast | Known only from type locality where it was forming low dense hummocks in alpine tundra |
Elevation | low to moderate elevations | moderate elevations |
Distribution |
CT; DE; MA; MD; ME; NC; NH; NJ; NY; PA; RI; VA; NB; NF; NS; PE; QC |
AK |
Discussion | The sporophytes of Sphagnum flavicomans are uncommon. It is associated with S. cuspidatum, S. papillosum, S. rubellum, S. pulchrum, and S. torreyanum. This species is the ecological replacement for S. fuscum in much of the Atlantic coastal plain; compared to that species, S. flavicomans is substantially more robust and has a larger stem leaf with a more pointed apex. See also discussion under 83. S. subfulvum. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Source | FNA vol. 27, p. 93. | FNA vol. 27, p. 98. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | S. acutifolium var. flavicomans, S. plumulosum var. flavicomans, S. subnitens var. flavicomans, S. subnitens var. obscurum, S. subnitens var. viride | |
Name authority | (Cardot) Warnstorf: in H. G. A. Engler, Pflanzenr. 51[III]: 79. (1911) | R. E. Andrus: Sida 22: 969, figs. 27–34. (2006) |
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