Sphagnum lindbergii |
Sphagnum torreyanum |
|
---|---|---|
brown-stem peat-moss, Lindberg's sphagnum |
Torrey's sphagnum |
|
Habit | Plants moderate-sized to large, moderately densely branched; green to brown, often bluish tinged and/or shiny when dry; capitulum flattopped with a conspicuous terminal bud. | Plants robust and weak-stemmed; green to golden yellow; capitulum ± rounded in emergent forms, flat in submersed forms; lacking distinct terminal bud. |
Stem(s) | leaves lingulate-spatulate, large, 1.3–1.6 mm; appressed to stem; apex very broad and lacerate; hyaline cells efibrillose and aporose, often septate. |
leaves triangular, 1–1.7 mm, apex acute to slightly obtuse; leaves usually appressed; margins entire; hyaline cells fibrillose and usually septate at base and sides. |
Branches | strongly 5-ranked and straight. |
unranked, long and tapering, leaves greatly elongated at distal end. |
Branch leaves | ovate-lanceolate, 1.5–3 mm; straight to slightly subsecund; imbricate to somewhat reflexed and not undulate; margins entire; hyaline cells long and narrow, length to width ca. 10:1 on convex surface with 1 or more small pores in the cell ends and angles and often with numerous pseudopores along the margins, on concave surface with large round wall thinnings on the cell ends and angles; chlorophyllous cells triangular to trapezoidal in transverse section, apex often exposed on concave surface. |
ovate-lanceolate to lanceolate, 3–5.5 mm; straight but sometimes slightly falcate-secund; weakly undulate and recurved when dry; margins entire; hyaline cells on convex surface with 0–1 pore per cell, on concave surface with round wall thinnings on the apices and angles; chlorophyllous cells narrowly triangular in transverse section and just enclosed on the concave surface. |
Sexual condition | monoicous or dioicous. |
dioicous. |
Spores | 22–34 µm; both surfaces smooth, apparent ridged border on proximal surface; proximal laesura more than 0.5 spore radius. |
26–29 µm; both surfaces distinctly papillose, appearing pusticulate to irregularly pusticulate; proximal laesura mostly less than 0.5 spore radius. |
Branch | fascicles with 2 spreading and 2 pendent branches, leaves not much elongated at distal end.; branch stems green, with cortex enlarged with retort cells. |
fascicles with 2 spreading and 2 pendent branches.; branch stems green; cortex enlarged with conspicuous retort cells. |
Sphagnum lindbergii |
Sphagnum torreyanum |
|
Habitat | Widespread forming carpets in ombrotrophic to weakly minerotrophic boreal mires | Forming wet often floating carpets in weakly minerotrophic mires |
Elevation | low to high elevations | low to moderate elevations |
Distribution |
AK; CO; NH; NY; WA; AB; BC; MB; NF; NS; NT; NU; ON; QC; YT; Greenland; Eurasia |
AL; CT; DE; FL; GA; LA; MA; MD; ME; MS; NC; NH; NJ; NY; PA; RI; SC; VA; VT; NB; NF; NS; QC; St Pierre and Miquelon (Miquelon) |
Discussion | Sporophytes are uncommon. Sphagnum lindbergii is normally easily distinguished from other carpet-forming species of sect. Cuspidata by its large, strongly lacerate stem leaf and dark brown to black stem. Sexual condition is taken from from L. I. Savicz-Lubitzkaya and Z. N. Smirnova (1968). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Sporophytes are uncommon in Sphagnum torreyanum. See discussion under 24. S. atlanticum for taxonomic distinctions. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 27, p. 70. | FNA vol. 27, p. 77. |
Parent taxa | Sphagnaceae > Sphagnum > sect. Cuspidata | Sphagnaceae > Sphagnum > sect. Cuspidata |
Sibling taxa | ||
Synonyms | S. cuspidatum var. torreyi, S. cuspidatum var. miquelonense, S. kearneyi, S. laxifolium var. miquelonense | |
Name authority | Schimper: Öfvers. Kongl. Vetensk.-Akad. Förh. 14: 126. (1857) | Sullivant: Mem. Amer. Acad. Arts, n. s. 4: 174. (1849) |
Web links |