familyMniaceae
genusMnium

Mnium blyttii

Bruch & Schimper

Bryol. Europ. 4: 208, plate 400. 1846.

Illustrated
Treatment appears in FNA Volume 28. Treatment on page 225. Mentioned on page 223.

Plants (1–) 2–5 (–7) cm. Stems dark reddish-brown. Leaves green to dark green, undulate or contorted and often somewhat twisted when dry, broadly ovate, elliptic, or ovate-elliptic, sometimes narrow, (2–) 2.5–3.5 (–4) mm; base short to long-decurrent; margins sometimes reddish-brown or brownish with age, 1-stratose or rarely 2-stratose in short sections, entire or weakly toothed distally, rarely to below mid leaf, teeth single or rarely paired, small, blunt, sometimes reduced to small extensions of distal cell ends; apex rounded-acute, acute, or obtuse, apiculate or sometimes cuspidate, cusp weakly toothed; costa subpercurrent, percurrent, or sometimes ending well before apex, distal abaxial surface smooth; medial laminal cells short-elongate or sometimes ± isodiametric and irregularly angular, (17–) 20–35 (–40) µm, slightly smaller towards margins, not in diagonal rows, sometimes in weakly defined longitudinal rows, weakly or not collenchymatous, blue postmortal color present in cells; marginal cells linear, in 1–2 (–3) rows. Sexual condition dioicous. Seta single. Capsule yellowbrown, 3–5 mm; operculum conic-mammillate; exostome greenish yellow. Spores 17–22 µm.


Phenology: Capsules mature summer.
Habitat: Moist soil, humus, rock, shaded cliffs
Elevation: low to high elevations

Distribution

V28 357-distribution-map.gif

Greenland, Alta., B.C., N.W.T., Nunavut, Yukon, Alaska, Calif., Colo., Idaho, Mont., N.Mex., Utah, Wash., Wyo., Europe, Asia

Discussion

Collections of Mnium blyttii with weakly toothed or entire leaves are fairly common and can superficially be mistaken for Cinclidium or Rhizomnium. However, even though many leaves appear entire, some leaves will have small forward-pointing bumps at the distal ends of a few marginal cells. The border of linear cells, although not as distinct as with most species of Mnium, and the larger plant and leaf size readily separate well-developed specimens of M. blyttii from M. stellare, the only other species of Mnium that can produce a postmortal color in its laminal cells.

Selected References

None.

Lower Taxa

None.
... more about "Mnium blyttii"
blackish +, orange-yellow +, reddish-brown +, yellowish-brown +, yellowish green +, red +, brown +  and yellow +
cuspidate +  and apiculate +
Obtuse (?) +, Acute (?) +  and Rounded-acute (?) +
Terry T. McIntosh +  and Steven G. Newmaster +
Bruch & Schimper +
red +  and yellowish +
long-decurrent +
cucullate +
horizontal;pendent +
oblong-cylindric +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
undifferentiated +
2 (?) +  and 1 (?) +
nodulose +
subpercurrent +
toothed +
Greenland +, Alta. +, B.C. +, N.W.T. +, Nunavut +, Yukon +, Alaska +, Calif. +, Colo. +, Idaho +, Mont. +, N.Mex. +, Utah +, Wash. +, Wyo. +, Europe +  and Asia +
low to high elevations +
brown +  and yellowish +
greenish yellow +
lanceolate-acuminate +
Moist soil, humus, rock, shaded cliffs +
crowded +  and distant +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
green +  and dark green +
ovate-elliptic +, elliptic +, ovate +, contorted +  and undulate +
larger +  and small +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
2-stratose +  and 1-stratose +
brownish +  and reddish-brown +
toothed +  and entire +
dioicous +  and sexual +
rhomboidal +  and short-linear +
conic-mammillate +
Capsules mature summer. +
Bryol. Europ. +
smaller +  and larger +
flexuose +  and straight +
elongate +
1 cm10 mm <br />0.01 m <br /> (5 cm50 mm <br />0.05 m <br />) +
Illustrated +
spheric +
not dendroid +, branched +  and simple +
dark reddish-brown +
Mnium blyttii +
species +
reduced +  and small +
open;compact +