Sphagnum macrophyllum |
Sphagnum pylaesii |
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largeleaf sphagnum |
Pylaes' sphagnum |
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Habit | Plants brown, dark brown to nearly black. | 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. |
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. |
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Branches | lacking or short and slender. |
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Branch leaves | lanceolate to linear-lanceolate, apex narrow and tubular, hyaline cells with 8–12 moderate-sized (more than 0.25 cell diameter) in mostly one row. |
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. |
Sexual condition | dioicous. |
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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. |
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Branch | fascicles none or 1 spreading branch. |
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Sphagnum macrophyllum |
Sphagnum pylaesii |
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Habitat | Floating or stranded at margins of shallow lakes and ponds, rarely in seeps where probably constantly wet | Weakly minerotrophic, wet rocks, poor fens |
Elevation | low to moderate elevations | low to high elevations |
Distribution |
AL; AR; DE; FL; GA; LA; MD; MS; NC; NJ; NY; SC; TN; TX; VA; NF; NS
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MA; ME; NC; NH; NJ; NF; NS; QC; Greenland; NY ; Europe
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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.) |
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Source | FNA vol. 27, p. 61. | FNA vol. 27, p. 84. |
Parent taxa | Sphagnaceae > Sphagnum > sect. Isocladus | Sphagnaceae > Sphagnum > sect. Subsecunda |
Sibling taxa | ||
Synonyms | Isocladus macrophyllus, S. macrophyllum var. burinense | Hemitheca pylaiei, S. pylaesii var. austinii, S. pylaesii var. prostratum, S. pylaesii var. ramosum, S. sedoides, S. sedoides var. austinii, S. sedoides var. prostratum |
Name authority | Bridel: Bryol. Univ. 1: 10. (1826) | Bridel: Bryol. Univ. 1: 749. (1827) |
Web links |