Mnium marginatum

(Dickson ex Withering) P. Beauvois

Prodr. Aethéogam., 75. 1805.

Basionym: Bryum marginatum Dickson ex Withering Syst. Arr. Brit. Pl. ed. 4, 3: 824. 1801
Synonyms: Mnium serratum Schrader ex Bridel
Treatment appears in FNA Volume 28. Treatment on page 226. Mentioned on page 223, 224, 227.

Plants (1–) 2–3 (–6) cm. Stems red or reddish-brown. Leaves green to dark green, contorted and twisted when dry, ovate-elliptic or sometimes elliptic or oblong-ovate, rarely narrow, (2–) 3–4 (–5) mm; base long-decurrent; margins reddish-brown, 2-stratose or rarely multistratose, toothed to below mid leaf or sometimes only distally, teeth paired or occasionally single, small to large, blunt or occasionally sharp; apex acute or acuminate, rarely obtuse or rounded, apiculate or cuspidate, cusp toothed; costa percurrent, subpercurrent, or excurrent, smooth, on well-developed leaves distal abaxial surface rarely with few blunt teeth; medial laminal cells ± isodiametric or short-elongate, (18–) 20–30 (–40) µm, slightly smaller towards margins, in diagonal or longitudinal rows, usually strongly collenchymatous, blue postmortal color absent; marginal cells linear, in 2–3 (–4) rows. Sexual condition synoicous or rarely dioicous. Seta single. Capsule yellowbrown, 2–4 mm; operculum rostrate; exostome reddish-brown, sometimes yellowish. Spores 18–32 µm.


Phenology: Capsules mature late spring.
Habitat: Forests on humus, soil, logs, rock, base of trees, shaded cliffs
Elevation: low to moderate elevations

Distribution

V28 360-distribution-map.gif

Greenland, Alta., B.C., Man., N.B., Nfld. and Labr., N.W.T., N.S., Nunavut, Ont., Que., Sask., Yukon, Ala., Alaska, Ariz., Ark., Calif., Colo., Conn., Ga., Idaho, Ill., Iowa, Ky., Maine, Mass., Mich., Minn., Mo., Mont., Nebr., Nev., N.H., N.Mex., N.Y., N.C., N.Dak., Ohio, Pa., R.I., S.Dak., Tenn., Utah, Vt., Va., Wash., W.Va., Wis., Wyo., Europe, Asia, Africa

Discussion

Mnium marginatum is a widespread species that should only be confused with the closely related 4. M. lycopodioides; see discussion under that species.

Selected References

None.

Lower Taxa

None.
... more about "Mnium marginatum"
blackish +, orange-yellow +, reddish-brown +, yellowish-brown +, yellowish green +, red +, brown +  and yellow +
cuspidate +  and apiculate +
Rounded (?) +, Obtuse (?) +, Acuminate (?) +  and Acute (?) +
Terry T. McIntosh +  and Steven G. Newmaster +
(Dickson ex Withering) P. Beauvois +
red +  and yellowish +
long-decurrent +
Bryum marginatum +
cucullate +
horizontal;pendent +
oblong-cylindric +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
undifferentiated +
2 (?) +  and 1 (?) +
nodulose +
excurrent +  and percurrent +
subpercurrent +
toothed +
Greenland +, Alta. +, B.C. +, Man. +, N.B. +, Nfld. and Labr. +, N.W.T. +, N.S. +, Nunavut +, Ont. +, Que. +, Sask. +, Yukon +, Ala. +, Alaska +, Ariz. +, Ark. +, Calif. +, Colo. +, Conn. +, Ga. +, Idaho +, Ill. +, Iowa +, Ky. +, Maine +, Mass. +, Mich. +, Minn. +, Mo. +, Mont. +, Nebr. +, Nev. +, N.H. +, N.Mex. +, N.Y. +, N.C. +, N.Dak. +, Ohio +, Pa. +, R.I. +, S.Dak. +, Tenn. +, Utah +, Vt. +, Va. +, Wash. +, W.Va. +, Wis. +, Wyo. +, Europe +, Asia +  and Africa +
low to moderate elevations +
brown +  and yellowish +
yellowish +  and reddish-brown +
lanceolate-acuminate +
Forests on humus, soil, logs, rock, base of trees, shaded cliffs +
crowded +  and distant +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
green +  and dark green +
well-developed +
oblong-ovate +, elliptic +, sometimes +  and ovate-elliptic +
larger +  and small +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
multistratose +  and 2-stratose +
reddish-brown +
dioicous +, synoicous +  and sexual +
rhomboidal +  and short-linear +
short-elongate +  and isodiametric +
Capsules mature late spring. +
Prodr. Aethéogam., +
smaller +  and larger +
flexuose +  and straight +
elongate +
1 cm10 mm <br />0.01 m <br /> (5 cm50 mm <br />0.05 m <br />) +
spheric +
not dendroid +, branched +  and simple +
reddish-brown +  and red +
Mnium serratum +
Mnium marginatum +
species +
few +  and single +
blunt +  and sharp +
small +  and large +
open;compact +