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five-rank peat-moss, sphagnum
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| Plants moderate-sized, typically stiff and compact, capitulum usually hemispherical; green, grayish white, pale yellow, purplish red, may have a slight metallic luster when dry. |
leaves triangular to triangular-lingulate, 1–1.3 mm, apex acute to slightly obtuse, border broad at base (more than 0.25 width); hyaline cells narrowly rhomboid, mostly 0–1-septate and mostly efibrillose. |
usually strongly 5-ranked. |
ovate to ovate-lanceolate, 1.1–1.5 mm, concave, straight, apex slightly involute; hyaline cells on convex surface with numerous oval to elliptic pores along commissures grading from small pores near apex to large round pores at base, concave surface with large round pores in proximal portions of leaf. |
monoicous or dioicous. |
19–27 µm, finely papillose on proximal surface, pusticulate on distal surface; proximal laesura less than 0.4 spore radius. |
fascicles with mostly 3 spreading and 1–2 pendent branches. |
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| Capsules mature mid summer. |
| Weakly minerotrophic and hygrophytic, wet mineral bedrock, damp coniferous humus along coast and in montane regions |
| low to high elevations |
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AK; CT; GA; MA; MD; ME; MN; NC; NH; NY; PA; TN; VA; VT; WV; BC; MB; NB; NF; NS; ON; QC; Eurasia |
Sporophytes are common in Sphagnum quinquefarium. This species is usually associated with S. capillifolium, S. girgensohnii, and S. russowii. No other species of sect. Acutifolia has the combination of quinquefarious branch leaves and three spreading branches per fascicle. Sphagnum rubiginosum has three spreading branches but the branch leaves are quite unranked and its lingulate stem leaf is quite distinct from the triangular stem leaf of S. quinquefarium. See also discussion under 86. S. talbotianum. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
| FNA vol. 27, p. 96. |
| Sphagnaceae > Sphagnum > sect. Acutifolia |
S. affine, S. alaskense, S. andersonianum, S. angermanicum, S. angustifolium, S. annulatum, S. aongstroemii, S. arcticum, S. atlanticum, S. austinii, S. balticum, S. bartlettianum, S. beothuk, S. bergianum, S. brevifolium, S. capillifolium, S. carolinianum, S. centrale, S. compactum, S. contortum, S. cribrosum, S. cuspidatum, S. cyclophyllum, S. fallax, S. fimbriatum, S. fitzgeraldii, S. flavicomans, S. flexuosum, S. fuscum, S. girgensohnii, S. henryense, S. imbricatum, S. inexspectatum, S. inundatum, S. isoviitae, S. jensenii, S. junghuhnianum, S. kenaiense, S. lenense, S. lescurii, S. lindbergii, S. macrophyllum, S. magellanicum, S. majus, S. mcqueenii, S. mendocinum, S. microcarpum, S. mirum, S. mississippiense, S. molle, S. obtusum, S. oregonense, S. orientale, S. pacificum, S. palustre, S. papillosum, S. perfoliatum, S. perichaetiale, S. platyphyllum, S. portoricense, S. pulchrum, S. pylaesii, S. recurvum, S. riparium, S. rubellum, S. rubiginosum, S. rubroflexuosum, S. russowii, S. sitchense, S. splendens, S. squarrosum, S. steerei, S. strictum, S. subfulvum, S. subnitens, S. subsecundum, S. subtile, S. talbotianum, S. tenellum, S. tenerum, S. teres, S. torreyanum, S. trinitense, S. tundrae, S. viride, S. warnstorfii, S. wilfii, S. wulfianum |
| S. acutifolium var. quinquefarium, S. schofieldii |
| (Lindberg) Warnstorf: Hedwigia 25: 222. (1886) |
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