Sphagnum pylaesii |
Sphagnum fuscum |
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Pylaes' sphagnum |
common brown peat-moss, rusty bogmoss, rusty peat moss, sphagnum |
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Habit | Plants slender and delicate, aquatic or prostrate, with a conspicuous terminal bud; dark greenish to purplish brown in submerged plants to deep salmon-red in prostrate plants, capitulum quite indistinct but with distinct terminal bud. | Plants small and slender, stiff and usually compact, capitulum small and flat-topped; typically deep reddish brown, also greenish brown in shaded habitats and in early seasonal growth, without metallic lustre when dry. |
Stem(s) | leaves broadly ovate, 1.5–2(2.5) mm; straight; hyaline cells fibrillose and nearly aporose, with single small pores occasionally found in the distal cell ends on the concave surface. |
leaves lingulate, 0.8–1.3 mm; apex broadly rounded and entire to lacerate, sometimes slightly mucronate or slightly denticulate; hyaline cells rhombic, 0–1(–2)-septate, usually efibrillose. |
Branches | lacking or short and slender. |
long and slender to short and compact, unranked to 5-ranked. |
Branch leaves | when present similar to stem leaves but smaller, 0.8–1.2 mm, hyaline cells fibrillose and mostly aporose, 1–6 irregularly round-shaped membrane gaps in some cells near apex on convex surface. |
ovate-lanceolate, 1.1–1.3 mm, straight, concave, apex strongly involute; margins entire, hyaline cells on convex surface with round to elliptic pores along the commissures, grading from small pores near the leaf apex to large pores near the base, concave surface with large round pores in proximal marginal regions of leaf. |
Sexual condition | dioicous. |
dioicous. |
Capsule | usually immersed in perichaetiale leaves, but may be slightly emergent, pseudostomata absent from capsule surface. |
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Spores | 29–41 µm, coarsely papillose on both surfaces, indistinct raised sculpture on distal surface; proximal laesura less than 0.5 spore radius. |
17–30 µm, finely papillose on proximal surface and pusticulate on distal surface; proximal laesura less than 0.5 spore radius. |
Branch | fascicles none or 1 spreading branch. |
fascicles with 2 spreading and 1–2 pendent branches. |
Sphagnum pylaesii |
Sphagnum fuscum |
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Phenology | Capsules mature late summer. | |
Habitat | Weakly minerotrophic, wet rocks, poor fens | Mires, hummocks, fens |
Elevation | low to high elevations | low to high elevations |
Distribution |
MA; ME; NC; NH; NJ; NF; NS; QC; Greenland; NY ; Europe
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AK; CA; CO; CT; ID; IL; IN; MA; MD; ME; MI; MN; MT; NC; NH; NJ; NY; OH; OR; PA; RI; UT; VA; VT; WA; WI; WV; WY; AB; BC; MB; NB; NF; NS; NT; NU; ON; PE; QC; SK; YT; Greenland; Eurasia
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Discussion | Sporophytes rare in Sphagnum pylaesii. This species is distributed as a pioneer on wet rocks associated with S. tenellum and S. papillosum, or in poor fens with S. pulchrum, S. majus, and S. papillosum. See also discussion under 53. S. cyclophyllum. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Sphagnum fuscum is common in ombrotrophic mires and alpine mountain summits where it may form small to large hummocks to 1 m in height, more infrequently in weakly minerotrophic mires and richer fens. Sporophytes are common in Sphagnum fuscum, which is associated with S. angustifolium, S. fallax, S. magellanicum, S. papillosum, and more infrequently with S. teres, and S. warnstorfii in richer sites. Very widespread but generally easily recognized, it is the only small brown hummock-forming species of sect. Acutifolia over most of its range. There are some significant variations in this species. The stem leaves can vary from having a rounded, entire apex to having a somewhat flat and lacerate apex. The branches also vary from being unranked and slender to 5-ranked and blunt. The color also can vary from a light to a dark brown. There does not seem, however, to be any consistent pattern to these variations and thus no taxonomic recognition has been given to them. See also discussion under 73. S. flavicomans. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 27, p. 84. | FNA vol. 27, p. 94. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | Hemitheca pylaiei, S. pylaesii var. austinii, S. pylaesii var. prostratum, S. pylaesii var. ramosum, S. sedoides, S. sedoides var. austinii, S. sedoides var. prostratum | S. acutifolium var. fuscum, S. tenuifolium, S. vancouveriense |
Name authority | Bridel: Bryol. Univ. 1: 749. (1827) | (Schimper) H. Klinggraff: Schriften Phys.-Ökon. Ges. Konigsberg 13: 4. (1872) |
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