Sphagnum imbricatum |
Sphagnum lenense |
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sphagnum |
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Habit | Plants moderate-sized, weak-stemmed, lax; yellowish to golden brown; forming loose carpets; branches loosely imbricate. | Plants compact, short-branched and small; strongly reddish to golden brown, glossy when dry; flat-topped capitulum with moderately differentiated terminal bud. |
Stem(s) | leaves short-rectangular, 0.8–1.1 mm, hyaline cells mostly non-septate and absent comb-fibrils. |
leaves lingulate,small, equal to or less than 0.8 mm, appressed to stem; apex with strong lacerate split in the middle; hyaline cells efibrillose, aporose, and nonseptate. |
Branches | strongly 5-ranked, short and blunt, not much elongated at distal end. |
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Branch leaves | ovate to ovate-elliptic, 1.4–1.8 mm; hyaline cells on convex surface with numerous pores along the commissures; comb-lamellae obvious only in proximal 1/2 of leaf; chlorophyllous cells broadly triangular in transverse section and well-enclosed on the convex surface. |
ovate; usually less than 1.5 mm; stiff and slightly reflexed, straight to slightly subsecund; margins entire; hyaline cells moderately long and narrow (6–8:1), convex surface with one small round pore per cell at apex and numerous pseudopores on the margin, concave surface with large round wall thinnings in the cell angles and ends; chlorophyllous cells triangular in transverse section, with apex reaching concave surface. |
Sexual condition | dioecious. |
unknown. |
Spores | (22) 24–27(–28) µm, surface granulate. |
not seen. |
Branch | fascicles with 2 spreading and 1–2 hanging branches.; branch stems with hyaline cells non-ornamented, no or weak funnel-like projections on the end walls of cortical cells, cortical cell walls usually with large round pores. |
fascicles with 2 spreading and 2–3 pendent branches.; branch stems green, with cortex enlarged with retort cells. |
Sphagnum imbricatum |
Sphagnum lenense |
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Habitat | Ecology poorly known | Common forming hummocks and carpets in a variety of weakly minerotrophic to ombrotrophic mires including Eriophorum tussock fens, dwarf shrub fens, polygon peatlands, string mires and raised bogs |
Elevation | moderate elevations | low to moderate elevations |
Distribution |
AK |
AK; NF; NT; NU; QC; YT; Greenland; Eurasia |
Discussion | K. I. Flatberg (1984) considered Sphagnum imbricatum to be East Asian in distribution but a recent collection in Selawik National Wildlife Refuge places it in the North American flora. It will undoubtedly be found elsewhere. Sphagnum imbricatum is closest in morphological detail to S. steerei, but the latter is a very dark colored and densely branched species whereas S. imbricatum is quite light in color and not particularly dense. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Sporophytes are rare in Sphagnum lenense. This species is easily distinguished from the similar S. lindbergii by its compact growth form and reddish brown color. Sphagnum lenense also is a hummock former in the tundra whereas S. lindbergii forms carpets. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 27, p. 52. | FNA vol. 27, p. 70. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | S. lindbergii var. microphyllum | |
Name authority | Russow: Beitr. Torfm., 99. (1865) | Pohle: Trudy Glavn. Bot. Sada 33: 14. (1915) |
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