Meesia triquetra

(Linnaeus ex Jolyclerc) Ångström
Nova Acta Regiae Soc. Sci. Upsal. 12: 357. 1844.
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, wide-spreading and distinctly 3-ranked when moist, ovate-lanceolate, 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


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.


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


Lower Taxa


... more about "Meesia triquetra"
Dale H. Vitt +
(Linnaeus ex Jolyclerc) Ångström +
Mnium triquetrum +
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 +
Nova Acta Regiae Soc. Sci. Upsal. +
Illustrated +
Meesia triquetra +
species +