Sphagnum sitchense |
Sphagnum brevifolium |
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Habit | Plants moderate-sized; capitulum flat-topped and dense; pale yellow and pink, lacking sheen. | Plants small and slender to moderate-sized, soft, not very compact; pale yellow, yellowish brown to brown; capitulum flat to somewhat convex, not 5-radiate to somewhat 5-radiate. |
Stem(s) | 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. |
leaves triangular to lingulate-triangular, apex apiculate, acute and sometimes slightly obtuse, spreading or sometimes appressed; hyaline cells nonseptate and often fibrillose at leaf apex. |
Branches | not 5-ranked. |
straight to distinctly curved, leaves unranked to 5-ranked, leaves not greatly elongate at branch distal end. |
Branch leaves | 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. |
ovate to ovate-lanceolate, greater than 1.2 mm, often subsecund, slightly undulate and slightly recurved when dry; margin entire; hyaline cells on convex surface with 1 pore per cell in apical end, on concave surface with round wall thinnings in the cell ends and angles; chlorophyllous cells equilateral to isosceles-triangular, well-enclosed on the concave surface. |
Sexual condition | unknown. |
dioicous. |
Spores | not seen. |
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Branch | fascicles with 2 spreading and 1 pendent branch. |
fascicles with 2 spreading and 1–2 pendent branches.; branch stems with cortex enlarged with conspicuous retort cells, sometimes reddish at proximal end. |
Sphagnum sitchense |
Sphagnum brevifolium |
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Habitat | Known only from type locality where it was forming low dense hummocks in alpine tundra | Ecology not presently understood due to past confusion with other species |
Elevation | moderate elevations | low to moderate elevations |
Distribution |
AK |
AK; MD; ME; MI; MN; NH; NY; VT; NF; QC; Europe |
Discussion | Details of the distribution of Sphagnum brevifolium are unclear because of confusion with S. fallax and S. isoviitae. This seems to be a species of poor to medium fens, where it occurs in depressions and floating mats; it does not appear to form extensive fast-growing mats as do S. fallax, S. isoviitae, and S. pacificum. Sphagnum brevifolium is one of five species in the S. recurvum complex with apiculate stem leaves. On the Pacific coast it seemingly co-occurs only with S. pacificum, from which it differs in having branch leaves less sharply recurved and more strongly 5-ranked. In eastern North America it is quite uncommon but can occur with both S. fallax and S. isoviitae of S. recurvum, in the broad sense. Sphagnum fallax has more sharply recurved branch leaves. Sphagnum splendens has a distinct shiny look. The much more common S. isoviitae has a distinctly flatter capitulum, narrower branch leaves and wider stem leaves. In fact, the relatively broad branch leaves of S. brevifolium sometimes can give it the appearance of a slender S. pulchrum, but the latter has much more strongly 5-ranked branch leaves and lacks paired pendent branch buds. See also discussion under 22. S. angustifolium. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Source | FNA vol. 27, p. 98. | FNA vol. 27, p. 66. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | S. cuspidatum var. brevifolium | |
Name authority | R. E. Andrus: Sida 22: 969, figs. 27–34. (2006) | (Lindberg) J. Röll: Bot. Centralbl. 39: 340. (1889) |
Web links |