Flora of North America species comparison

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Meesia triquetra

meesia moss, three-angle hump-moss, three-rank hump-moss
Habit 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.
Seta

3–10 cm.
Sexual condition

dioicous.
Capsule

3–4.5 mm.
Spores

33–38 µm.

Meesia triquetra
Habitat Rich fens, arctic and boreal areas
Elevation moderate to high elevations
Distribution
from FNA
AK; CA; MI; MN; MT; NE; NJ; NY; OR; SD; VT; AB; BC; MB; NL; NT; NU; ON; QC; YT; Greenland; n Eurasia
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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.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 28, p. 33.
Parent taxa Meesiaceae > Meesia
Sibling taxa
M. longiseta, M. uliginosa
Synonyms Mnium triquetrum
Name authority (Linnaeus ex Jolyclerc) Ångström: Nova Acta Regiae Soc. Sci. Upsal. 12: 357. (1844)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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