Sphagnum lindbergii |
Sphagnum papillosum |
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brown-stem peat-moss, Lindberg's sphagnum |
fat peat-moss, papillose sphagnum |
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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 moderate-sized to fairly robust; strong-stemmed and generally compact, capitulum usually not much enlarged; greenish brown to deep golden brown; forming compact carpets in floating mats and depressions as well as dense stands on hummock sides and low hummocks. |
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 to 1.3 × 0.7 mm; rarely hemiisophyllous; hyaline cells non-ornamented, mostly septate. |
Branches | strongly 5-ranked and straight. |
generally short and blunt, leaves spreading. |
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. |
broadly ovate, 1.7 × 1 mm; hyaline cells on convex surface with round to elliptic pores along the commissures, hyaline cell walls covered with papillae where overlying chlorophyllous cells; chlorophyllous cells trapezoidal to truncate-elliptic in transverse section, equally exposed on both surfaces or less exposed on convex surface, end walls thickened. |
Sexual condition | monoicous or dioicous. |
dioicous. |
Capsule | with numerous pseudostomata. |
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Spores | 22–34 µm; both surfaces smooth, apparent ridged border on proximal surface; proximal laesura more than 0.5 spore radius. |
26–36 µm; more roughly papillose on distal surface than proximal surface, distinct raised, bifurcated-Y mark sculpture on distal surface; proximal laesura 0.5 spore radius or more. |
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 2–3 pendent branches.; branch stems with hyaline cells non-ornamented, no or weak funnel-like projections on the interior end walls, mostly with 1 pore per cell on superficial cell wall. |
Sphagnum lindbergii |
Sphagnum papillosum |
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Phenology | Capsules mature mid to late summer. | |
Habitat | Widespread forming carpets in ombrotrophic to weakly minerotrophic boreal mires | Very common in very poor to poor fen mire habitats where it is often a major peat former, but scarce to absent in truly ombrotrophic peatlands sites |
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 |
AK; CA; CT; DE; IL; IN; MD; ME; MI; MN; NC; NH; NJ; NY; OH; OR; PA; SC; VT; WA; WI; WV; BC; NB; NF; NS; ON; PE; QC; YT; Eurasia
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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.) |
Sphagnum papillosum is often easily field-identifiable by its rich golden brown to dark brown color and short, blunt branches. Nearly all specimens have the papillae on the branch leaf chorophyll cells but a few smooth forms have been found. Such forms will have stem leaves with divided hyaline cells whereas in the confusable species S. palustre and S. centrale such cells are rare or absent. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 27, p. 70. | FNA vol. 27, p. 53. |
Parent taxa | Sphagnaceae > Sphagnum > sect. Cuspidata | Sphagnaceae > Sphagnum > sect. Sphagnum |
Sibling taxa | ||
Synonyms | S. cymbifolium var. papillosum, S. papillosum var. laeve, S. papillosum var. sublaeve, S. waghornei | |
Name authority | Schimper: Öfvers. Kongl. Vetensk.-Akad. Förh. 14: 126. (1857) | Lindberg: Acta Soc. Sci. Fenn. 10: 280. (1872) |
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