Sphagnum mirum |
Sphagnum warnstorfii |
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Warnstorf's peat-moss, Warnstorf's sphagnum |
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Habit | Plants fairly slender to moderate-sized, green; forming low dense hummocks. | Plants small or less frequently moderate-sized, slender, capitulum flat-topped and stellate; green or dark purplish red and green, rarely green throughout, often with a distinctive bluish cast when dry. |
Stem(s) | leaves generally longer than branch leaves, 1.1–1.7 mm, lingulate to lingulate-spathulate, hyaline cells mostly non-septate. |
leaves triangular-lingulate to lingulate, 1.1–1.4 mm, apex broad-rounded to narrowly truncate, border very broad at base (more than 0.3 width); hyaline cells efibrillose, rhombic, mostly 1-septate but can be non-septate. |
Branches | terete. |
long and tapering, usually strongly 5-ranked. |
Branch leaves | 1–1.4 mm, broadly ovate, with a narrow involute tip; hyaline cells only slightly bulging on either surface, in proximal half of leaf aporose on convex surface and with large faint pores on concave surface; internal commissural walls distinctly papillose; chlorophyllous cells elliptical to elliptical-triangular in transverse section, enclosed on both surfaces with the widest part in the leaf middle. |
ovate-lanceolate, 0.9–1.4 mm, concave, straight, apex involute; hyaline cells on convex surface with very small ringed pores (less than 0.25 cell width) along commissures near apex, changing abruptly to large elliptical pores (0.4 cell width or more) basally, concave surface with large round pores in proximal margins and leaf base. |
Sexual condition | dioicous. |
dioicous. |
Spores | ca. 31 µm, ornamented by small somewhat amalgamated granulae. |
17–26 µm, finely papillose on both surfaces; proximal laesura less than 0.5 spore radius. |
Branch | fascicles of 2 spreading and 1–2 hanging branches.; branch stems with 1–2 layers of cortical cells. |
fascicles with 2 spreading and 1–2 pendent branches. |
Sphagnum mirum |
Sphagnum warnstorfii |
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Phenology | Sporophytes abundant, capsules mature August. | Capsules mature late summer to early autumn. |
Habitat | Ecology poorly known but probably quite minerotrophic | Minerotropic, hygrophytic, frequent in medium to rich fens |
Elevation | low elevations | low to moderate elevations |
Distribution |
AK |
AK; CO; CT; IA; ID; IN; MA; MD; ME; MI; MN; MT; NC; NH; NJ; NY; OH; PA; RI; SD; UT; VT; WA; WI; WY; AB; BC; MB; NB; NF; NS; NT; NU; ON; QC; SK; YT; Greenland; Eurasia
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Discussion | Sphagnum mirum has only been recently discovered and so far is known only from its type locality, where it was growing in a fen mixed with S. teres. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Sporophytes are uncommon in Sphagnum warnstorfii. This is one of the most minerotrophic species of the flora, is hygrophytic, and has a very broad niche. The most commonly associated vascular plants are Thuja occidentalis, Abies balsamea, and Picea rubens. Bryophytes typically associated with it are S. centrale, S. squarrosum, S. teres, Calliergonella cuspidata, and Campylium stellatum. This species is perhaps most similar to S. bartlettianum, with which it has small range overlap. Sphagnum warnstorfii has a shorter and less sharply pointed stem leaf and the red color with a characteristic bluish caste compared to the crimson red of S. bartlettianum. See also discussion under 81. S. russowii and 86. S. talbotianum. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 27, p. 58. | FNA vol. 27, p. 101. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | S. warnstorfianum | |
Name authority | Flatberg & Thingsgaard: Bryologist 106: 501. (2003) | Russow: Sitzungs.-Ber. Naturf.-Ges. Univ. Dorpat 8: 315. (1888) |
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