Sphagnum teres |
Sphagnum junghuhnianum |
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rigid peat-moss, sphagnum |
junghuhn's sphagnum |
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Habit | Plants fairly slender to moderate-sized, pale green to yellowish, or reddish brown in sun-grown forms; forms loose to dense carpets. | Plants moderate-sized, soft, loosely tufted, slender, capitulum flat-topped to rounded; pale, dirty green, yellowish to brownish; without metallic lustre when dry. |
Stem(s) | leaves generally larger than branch leaves, 1.3– 1.8 × 0.8–1 mm; elliptic to lingulate-spatulate, widest above middle, hyaline cells nonseptate. |
leaves triangular-lingulate, 1.2–1.6 mm, broadly apex acute to narrowly truncate and toothed, border narrow or indistinct at base (less than 0.25 the width); hyaline cells rhomboid, mostly 0–1-septate; convex surface with membrane pleats, concave surface with 1–3 rounded membrane gaps occupying most of cell. |
Branches | long-cylindrical, branch leaves terete to sometimes distinctly squarrose in shade forms. |
somewhat 5-ranked. |
Branch leaves | 1–1.4 mm, ovate to ovate-lanceolate, gradually narrowed to an involute tip, hyaline cells somewhat bulging on concave surface and nearly plane on convex surface, with 4–8 large, elliptic, unringed pores per cell on convex surface and 1–4 irregularly rounded pores per cell on concave surface, internal commissural walls smooth to rather strongly papillose, chlorophyllous cells ovate-triangular with the widest part at or close to the convex surface. |
ovate-lanceolate, 1.3–2 mm, strongly concave, apex strongly involute; margins entire to somewhat toothed near apex, hyaline cells on convex surface with numerous ringed elliptic pores (6–10) along commissures, concave surface mostly aporose except near margins; Sexual condition dioicous or monoicous. |
Sexual condition | dioicous. |
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Spores | 21–26 µm; proximal and distal surfaces smooth, papillae indistinct; proximal laesura 0.5–0.6 spore radius. |
21–23 µm; minutely papillose. |
Branch | fascicles typically with 3 spreading (sometimes 2) and 2 pendent branches.; branch stems with single layer of cortical cells. |
fascicles with 2 spreading and 1–2 pendent branches. |
Sphagnum teres |
Sphagnum junghuhnianum |
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Phenology | Sporophytes uncommon, capsules mature late spring to early summer. | |
Habitat | Strongly minerotrophic, in open to medium rich fens, less frequent in coniferous mires, characteristic species of rich, weakly acidic to slightly basic mires | Shady, seepy cliffs |
Elevation | low to high elevations | low elevations |
Distribution |
AK; CA; CO; CT; IA; ID; IL; IN; MA; ME; MI; MN; MT; ND; NH; NJ; NY; OH; OR; PA; VT; WA; WI; WY; AB; BC; MB; NF; NS; NT; NU; ON; QC; SK; YT; Greenland; Eurasia
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BC; e Asia |
Discussion | Shade forms of Sphagnum teres are often squarrose but these are usually considerably smaller than S. squarrosum. For other distinctions between these species, see discussion under the latter. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Sphagnum junghuhnianum in the flora area is known only from the Queen Charlotte Islands. Sporophytes of Sphagnum junghuhnianum were not seen. Three other large, brown species of sect. Acutifolia have stem leaves without fimbriate to lacerate apices, S. subnitens (forms without red color), S. subfulvum, and S. flavicomans. Sphagnum flavicomans has a more pointed stem leaf and a darker brown color as well as a strongly different ecology and range. Both S. subnitens and S. subfulvum have a glossy sheen when dry that is lacking in S. junghuhnianum. Sexual condition and spore characters were taken from H. A. Crum (1984). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 27, p. 59. | FNA vol. 27, p. 95. |
Parent taxa | Sphagnaceae > Sphagnum > sect. Squarrosa | Sphagnaceae > Sphagnum > sect. Acutifolia |
Sibling taxa | ||
Synonyms | S. squarrosum var. teres, S. teres var. squarrosulum | S. junghuhnianum subsp. pseudomolle, S. pseudomolle |
Name authority | Ångström: in C. J. Hartman, Handb. Skand Fl. ed. 8, 417. (1861) | Dozy & Molkenboer: Verh. Kon. Akad. Wetensch., Afd. Natuurk. 2: 8. (1854) |
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