Sphagnum lenense |
Sphagnum cuspidatum |
|
---|---|---|
sphagnum |
feathery bog-moss, feathery peat-moss, tooth sphagnum |
|
Habit | Plants compact, short-branched and small; strongly reddish to golden brown, glossy when dry; flat-topped capitulum with moderately differentiated terminal bud. | Plants slender and weak-stemmed, moderate-sized, flaccid and plumose in aquatic forms to more compact in emergent forms, spreading branches often conspicuously falcate, giving capitulum a twisted appearance; green to yellow, often tinged with red, red-brown or brown in capitula. |
Stem(s) | 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. |
leaves triangular-ovate, more than 1.2 mm, usually appressed; apex acute to apiculate, hyaline cells rarely septate or porose, apical region often fibrillose. |
Branches | strongly 5-ranked, short and blunt, not much elongated at distal end. |
mostly unranked to weakly 5-ranked, often conspicuously falcate, leaves greatly elongated at distal end. |
Branch leaves | 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. |
ovate-lanceolate to lanceolate, 1.6–5 mm, falcate toward branch tips, when dry often undulate and recurved, rarely weakly serrulate along the margins in submerged forms, leaves from middle of spreading branches with length to width ratio less than or equal to 1:0.28; hyaline cells length to width ratio in apical convex surface region 8:1 or more, convex surface with 0–1 small round pores at apex, concave surface with faint round wall thinnings in cell apices and angles; chlorophyllous cells triangular to trapezoidal in transverse section, broadly exposed on the convex surface and exposed slightly on the concave surface. |
Sexual condition | unknown. |
dioicous. |
Spores | not seen. |
29–38 µm; covered with large papillae on both surfaces, appearing pusticulate; proximal laesura less than 0.5 spore radius. |
Branch | fascicles with 2 spreading and 2–3 pendent branches.; branch stems green, with cortex enlarged with retort cells. |
fascicles with 2 spreading and 2–3 pendent branches.; branch stems green, but often pinkish at the proximal ends, with cortex enlarged with conspicuous retort cells. |
Sphagnum lenense |
Sphagnum cuspidatum |
|
Habitat | 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 | Widespread forming wet carpets in ombrotrophic to weakly minerotrophic mires |
Elevation | low to moderate elevations | low to moderate elevations |
Distribution |
AK; NF; NT; NU; QC; YT; Greenland; Eurasia |
AL; CT; DE; FL; GA; IL; IN; KS; MA; MD; ME; MI; MN; MS; NC; NH; NJ; NY; OH; PA; RI; SC; TN; VA; VT; WI; WV; NB; NF; NS; ON; QC; Europe
|
Discussion | 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.) |
Distinguishing Sphagnum cuspidatum from S. viride is sometimes difficult, as both occur over a similar geographic range and both grow in wet carpets. Sphagnum cuspidatum has narrower branch leaves and usually a distinct red tinge at the branch bases within the capitulum. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 27, p. 70. | FNA vol. 27, p. 66. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | S. lindbergii var. microphyllum | S. cuspidatum var. plumosum, S. faxonii, S. virginianum |
Name authority | Pohle: Trudy Glavn. Bot. Sada 33: 14. (1915) | Hoffman: Deutschl. Fl. 2: 22. (1796) |
Web links |