Sphagnum fimbriatum |
Sphagnum andersonianum |
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fringe bogmoss, fringe peat-moss, sphagnum |
Anderson's sphagnum |
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Habit | Plants typically small and slender, larger and compact in the Arctic, capitulum small to moderate-sized, often with a conspicuous terminal bud; green, yellowish brown to brown; without metallic lustre when dry. | Plants small, soft and slender; capitulum small; pale pink to pale purplish red; without metallic lustre when dry. | ||||
Stem(s) | leaves spatulate to broad-spatulate, 0.8–1.5(–2) mm, strongly lacerate across the broad apex and often part way down the margins, border scarcely to strongly broadened at base (0.25 width of base or less); hyaline cells rhomboid, efibrillose and often 1–2-septate. |
leaves lingulate, 0.9–1.2(–1.4) mm, apex rounded-erose to sometimes slightly apiculate, border moderately strong and broadened at the base (to 0.8 the width); hyaline cells rhombic, 0–1-septate, usually efibrillose. |
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Branches | not 5-ranked, quite terete, long, and slender Branch fascicles with 1– 2 spreading and 1–2 pendent branches. |
not or slightly 5-ranked, lax. |
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Branch leaves | ovate to ovate-lanceolate; 1.1–1.5(–2) mm, slightly concave, straight; apex involute; margins entire; hyaline cells on convex surface with numerous pores along the commissures grading from small pores near leaf apex to large pores at base, concave surface with large round pores at leaf apex and along margins. |
ovate, 0.8–1.4 mm, distinctly concave, straight, apex dentate and involute; border entire; hyaline cells on convex surface with elliptic pores along the commissures, grading from smaller pores near the apex to larger pores at the base, concave surface with large round pores on the proximal portions of the leaf. |
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Sexual condition | often monoicous. |
dioicous. |
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Spores | 20–27 µm, finely papillose on both surfaces; proximal laesura less than 0.5 spore radius. |
18–24 µm; coarsely papillose on both surfaces; proximal laesura less than 0.5 the length of the spore radius. |
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Branch | fascicles with 2 spreading and 1–2 pendent branches. |
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Sphagnum fimbriatum |
Sphagnum andersonianum |
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Habitat | Weakly minerotrophic | |||||
Elevation | low to moderate elevations | |||||
Distribution |
North America; South America; Eurasia; Pacific Islands (New Zealand)
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AK; CT; MA; ME; NH; NY; RI; VT; BC; NF; NS; QC; Europe |
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Discussion | Subspecies 2 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Sporophytes are uncommon in Sphagnum andersonianum. Its distribution is uncertain due to past taxonomic confusion with S. rubellum, S. capillifolium, and other closely related species in sect. Acutifolia. This is one of the most hydrophytic species of the section and is often associated with S. angustifolium, S. fallax, and S. rubellum. It is often not easily distinguished from S. rubellum, with which it may intergrade in a manner similar to that already demonstrated for S. rubellum and S. capillifolium by N. Cronberg (1997, 1998). Phenotypically S. andersonianum is a softer, paler plant with branch leaves that are more ovate and concave on branches that are less 5-ranked. Sphagnum rubellum also has the branch leaves sometimes subsecund while in S. andersonianum they are straight. Ecologically S. rubellum is an open mire species of usually ombrotrophic conditions, where it often forms hummocks, while S. andersonianum occurs in more sheltered sites where there is some mineral influence. Where they occur together, S. rubellum is on the tops of hummocks and S. andersonianum is on the hummock sides and bases. Microscopically S. rubellum has stem leaves with at least some of the hyaline cells twice septate, while in S. andersonianum none are twice septate. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 27, p. 92. | FNA vol. 27, p. 88. | ||||
Parent taxa | Sphagnaceae > Sphagnum > sect. Acutifolia | Sphagnaceae > Sphagnum > sect. Acutifolia | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Name authority | Wilson & Hooker: in J. D. Hooker, Fl. Antarct., 398. (1847) | R. E. Andrus: Bryologist 83: 60, figs. 1–7. (1980) | ||||
Web links |