Sphagnum macrophyllum |
Sphagnum torreyanum |
|
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largeleaf sphagnum |
Torrey's sphagnum |
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Habit | Plants brown, dark brown to nearly black. | 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 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 | unranked, long and tapering, leaves greatly elongated at distal end. |
|
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. |
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 | dioicous. |
|
Spores | 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.; branch stems green; cortex enlarged with conspicuous retort cells. |
|
Sphagnum macrophyllum |
Sphagnum torreyanum |
|
Habitat | Floating or stranded at margins of shallow lakes and ponds, rarely in seeps where probably constantly wet | Forming wet often floating carpets in weakly minerotrophic mires |
Elevation | low to moderate elevations | low to moderate elevations |
Distribution |
AL; AR; DE; FL; GA; LA; MD; MS; NC; NJ; NY; SC; TN; TX; VA; NF; NS
|
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 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. 61. | FNA vol. 27, p. 77. |
Parent taxa | Sphagnaceae > Sphagnum > sect. Isocladus | Sphagnaceae > Sphagnum > sect. Cuspidata |
Sibling taxa | ||
Synonyms | Isocladus macrophyllus, S. macrophyllum var. burinense | S. cuspidatum var. torreyi, S. cuspidatum var. miquelonense, S. kearneyi, S. laxifolium var. miquelonense |
Name authority | Bridel: Bryol. Univ. 1: 10. (1826) | Sullivant: Mem. Amer. Acad. Arts, n. s. 4: 174. (1849) |
Web links |