Sphagnum teres

Ångström in C. J. Hartman

in C. J. Hartman, Handb. Skand Fl. ed. 8, 417. 1861,.

Basionym: Sphagnum squarrosum var. teres Schimper Vers. Entw.-Gesch. Torfm., 64. 1858
Synonyms: Sphagnum teres var. squarrosulum (Schimper) Warnstorf
Treatment appears in FNA Volume 27. Treatment on page 59. Mentioned on page 37, 58, 84, 92, 94, 98, 101.

Plants fairly slender to moderate-sized, pale green to yellowish, or reddish-brown in sun-grown forms; forms loose to dense carpets. Stems pale green to redbrown; 3–4 layers of superficial cells. Stem-leaves generally larger than branch leaves, 1.3– 1.8 × 0.8–1 mm; elliptic to lingulate-spatulate, widest above middle, hyaline cells nonseptate. Branches long-cylindrical, branch leaves terete to sometimes distinctly squarrose in shade-forms. Branch fascicles typically with 3 spreading (sometimes 2) and 2 pendent branches. Branch stems with single layer of cortical cells. Branch leaves 1–1.4 mm, ovate to ovatelanceolate, 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. Sexual condition dioicous. Spores 21–26 µm; proximal and distal surfaces smooth, papillae indistinct; proximal laesura 0.5–0.6 spore radius.


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
Elevation: low to high elevations

Distribution

Greenland, Alta., B.C., Man., Nfld. and Labr. (Nfld.), N.W.T., N.S., Nunavut, Ont., Que., Sask., Yukon, Alaska, Calif., Colo., Conn., Idaho, Ill., Ind., Iowa, Maine, Mass., Mich., Minn., Mont., N.H., N.J., N.Y., N.Dak., Ohio, Oreg., Pa., Vt., Wash., Wis., Wyo., Eurasia

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.

Selected References

None.

Lower Taxa

None.

"thinner" is not a number.

... more about "Sphagnum teres"
fringed +
Cyrus B. McQueen† +  and Richard E. Andrus +
Ångström in C. J. Hartman +
Sphagnum squarrosum var. teres +
differentiated +
ratio +, length +  and width +
narrowed +, ovate +  and ovatelanceolate +
0.1 cm1 mm <br />0.001 m <br /> (0.14 cm1.4 mm <br />0.0014 m <br />) +
pendent +  and spreading +
2 +  and 3 +
long-cylindrical +
more slender +
differentiated +
chlorophyllous +
alternating +
elliptical +  and ovate-elliptical +
strengthened +
nonornamented +
1 (?) +  and 2 (?) +
dioicous +  and sexual +
ovate-triangular +
enlarged +
fibrillose +
spherical +
2 cm20 mm <br />0.02 m <br /> (?) +
monoicous +, dioicous +  and sexual +
Greenland +, Alta. +, B.C. +, Man. +, Nfld. and Labr. (Nfld.) +, N.W.T. +, N.S. +, Nunavut +, Ont. +, Que. +, Sask. +, Yukon +, Alaska +, Calif. +, Colo. +, Conn. +, Idaho +, Ill. +, Ind. +, Iowa +, Maine +, Mass. +, Mich. +, Minn. +, Mont. +, N.H. +, N.J. +, N.Y. +, N.Dak. +, Ohio +, Oreg. +, Pa. +, Vt. +, Wash. +, Wis. +, Wyo. +  and Eurasia +
low to high elevations +
dioicous +, monoicous +  and sexual +
conspicuous +
isophyllous +, hemiisophyllous +  and anisophyllous +
sun-grown +
Strongly minerotrophic, in open to medium rich fens, less frequent in coniferous mires, characteristic species of rich, weakly acidic to slightly basic mires +
papillose +  and smooth to rather +
inconspicuous +
Sporophytes uncommon, capsules mature late spring to early summer. +
4 +  and 8 +
in C. J. Hartman, Handb. Skand Fl. ed. +
tetrahedral +
septate +, porose +  and efibrillose +
1.3mm;1.8mm +
elliptic;lingulate-spatulate +
generally larger +
widest +, 0.8mm +  and 1mm +
pale green;redbrown +
3 +  and 4 +
differentiated +
1 (?) +  and 4 (?) +
smooth;finely papillose +
convex +, concave +  and plane +
Sphagnum teres var. squarrosulum +
Sphagnum teres +
Sphagnum sect. Squarrosa +
species +
swollen +
pale green +  and yellowish or reddish-brown +
fairly slender +  and moderate-sized +