Meesia triquetra

(Linnaeus ex Jolyclerc) Ångström

Nova Acta Regiae Soc. Sci. Upsal. 12: 357. 1844.

Illustrated
Basionym: Mnium triquetrum Linnaeus ex Jolyclerc Syst. Sex. Vég., 749. 1803
Treatment appears in FNA Volume 28. Treatment on page 33.

Plants 0.1–1.2 cm. Stem-leaves contorted when dry, widespreading and distinctly 3-ranked when moist, ovatelanceolate, 1.5–4 mm; base decurrent; margins plane to weakly reflexed proximally, serrulate distally; apex acute; costa narrow, ending in or just before apex; inner laminal cells smaller, walls thicker than marginal cells. Sexual condition dioicous. Seta 3–10 cm. Capsule 3–4.5 mm. Spores 33–38 µm.


Habitat: Rich fens, arctic and boreal areas
Elevation: moderate to high elevations

Distribution

V28 34-distribution-map.gif

Greenland, Alta., B.C., Man., Nfld. and Labr., N.W.T., Nunavut, Ont., Que., Yukon, Alaska, Calif., Mich., Minn., Mont., Nebr., N.J., N.Y., Oreg., S.Dak., Vt., n Eurasia

Discussion

Meesia triquetra is frequent where appropriate habitat is available, and disjunct in a few locations farther south. The species is usually easily distinguished by its three-ranked, widely spreading leaves that have serrulate margins. The sexual condition is dioicous.

Selected References

None.

Lower Taxa

None.
... more about "Meesia triquetra"
Dale H. Vitt +
(Linnaeus ex Jolyclerc) Ångström +
decurrent +
Mnium triquetrum +
cucullate +
clavate;pyriform +
0.3 cm3 mm <br />0.003 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
mammillose +  and smooth +
Greenland +, Alta. +, B.C. +, Man. +, Nfld. and Labr. +, N.W.T. +, Nunavut +, Ont. +, Que. +, Yukon +, Alaska +, Calif. +, Mich. +, Minn. +, Mont. +, Nebr. +, N.J. +, N.Y. +, Oreg. +, S.Dak. +, Vt. +  and n Eurasia +
moderate to high elevations +
Rich fens, arctic and boreal areas +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
ovatelanceolate +
erect;widespreading +
ovatelanceolate;linear or obovate +
Nova Acta Regiae Soc. Sci. Upsal. +
slender +
3 cm30 mm <br />0.03 m <br /> (10 cm100 mm <br />0.1 m <br />) +
Illustrated +
ovatelanceolate +
simple;sparsely branched +
erect;ascending +
Meesia triquetra +
species +
dioicous +  and sexual +
thicker +