Plagiomnium ellipticum

(Bridel) T. J. Koponen

Ann. Bot. Fenn. 8: 367. 1971.

Basionym: Mnium ellipticum Bridel Muscol. Recent., suppl. 3: 53. 1817
Synonyms: M. affine var. rugicum (Laurer) Bruch & Schimper Plagiomnium rugicum
Treatment appears in FNA Volume 28. Treatment on page 233. Mentioned on page 230, 231, 232.

Erect stems 2–5 cm, not dendroid; sterile stems to 12 cm. Leaves green to yellow-green, crisped and contorted when dry, flat when moist, broadly elliptic, ovate, orbicular, or oblongelliptic, (1–) 2–6 (–8) mm; base not decurrent or rarely short-decurrent; margins weakly to moderately toothed distally or to 3/4 leaf length, rarely to near base, often entire on sterile stems, teeth blunt, of 1 (or 2) cells; apex broadly rounded, obtuse, or occasionally truncate or retuse, usually narrowly mucronate or cuspidate, cusp bent to side, rarely toothed; costa percurrent or excurrent; medial laminal cells elongate or occasionally ± isodiametric, (30–) 50–65 (–85) µm, distinctly smaller near margins, often less than 1/2 size, in longitudinal and ± diagonal rows, not to weakly, rarely strongly, collenchymatous, walls pitted, pits sometimes indistinct or absent; marginal cells short-linear or rhomboidal, sometimes linear in larger leaves, in 2–4 rows. Sexual condition dioicous. Seta 1 (–3), yellow to reddish-brown, 1.8–4.5 cm. Capsule pendent, cylindric or oblong-cylindric, 3–5 mm, neck not distinct; operculum conic-apiculate. Spores 25–30 µm.


Phenology: Capsules mature late spring.
Habitat: Peat or humus in open tundra, bogs, fens, wet meadows and forests, swamps, shores of rivers and lakes, fire-dependent forests/woodlands, cliff/talus
Elevation: low elevations

Distribution

V28 370-distribution-map.gif

Greenland, Alta., B.C., Man., Nfld. and Labr., N.W.T., Ont., Que., Sask., Yukon, Alaska, Calif., Colo., La., Maine, Mich., Minn., Mo., Mont., Nebr., N.Y., N.Dak., Okla., Oreg., Pa., S.Dak., Tex., Utah, Wis., Wyo., South America, Europe, Asia

Discussion

Plagiomnium ellipticum often forms wide mats over litter and organic soil in wetland habitats. The species is morphologically variable, especially with respect to leaf margin serration and plant size. Collections from higher latitudes frequently lack marginal teeth. The larger size and the longer, pitted laminal cells of P. ellipticum readily distinguish it from the similar P. rostratum. See the discussion under 2. P. ciliare regarding P. ellipticum.

Selected References

None.

Lower Taxa

None.
... more about "Plagiomnium ellipticum"
blackish +, orange-yellow +, reddish-brown +, yellowish-brown +, yellowish green +, red +, brown +  and yellow +
cuspidate +  and apiculate +
Cuspidate (?) +, Mucronate (?) +, Retuse (?) +, Truncate (?) +, Obtuse (?) +  and Rounded (?) +
Terry T. McIntosh +  and Steven G. Newmaster +
(Bridel) T. J. Koponen +
short-decurrent +
not decurrent +
Mnium ellipticum +
cucullate +
yellowish-brown +  and yellow +
oblong-cylindric +  and cylindric +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
undifferentiated +
nodulose +
excurrent +  and percurrent +
subpercurrent +
toothed +  and bent +
Greenland +, Alta. +, B.C. +, Man. +, Nfld. and Labr. +, N.W.T. +, Ont. +, Que. +, Sask. +, Yukon +, Alaska +, Calif. +, Colo. +, La. +, Maine +, Mich. +, Minn. +, Mo. +, Mont. +, Nebr. +, N.Y. +, N.Dak. +, Okla. +, Oreg. +, Pa. +, S.Dak. +, Tex. +, Utah +, Wis. +, Wyo. +, South America +, Europe +  and Asia +
low elevations +
yellow +  and yellowish-brown +
brown +  and yellow +
lanceolate-acuminate +
Peat or humus in open tundra, bogs, fens, wet meadows and forests, swamps, shores of rivers and lakes, fire-dependent forests/woodlands, cliff/talus +
crowded +  and distant +
0.6 cm6 mm <br />0.006 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
green +  and yellow-green +
oblongelliptic +, orbicular +, ovate +, elliptic +  and crisped +
larger +  and small +
0.2 cm2 mm <br />0.002 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
yellow-green +  and green +
0 +  and 3/4 +
0 +  and 1/2 +
dioicous +  and sexual +
rhomboidal +  and short-linear +
isodiametric +  and elongate +
not distinct +
rostrate +  and conic-apiculate +
Capsules mature late spring. +
indistinct +
Ann. Bot. Fenn. +
smaller +  and larger +
diagonal +
yellow +  and reddish-brown +
straight +  and flexuose +
elongate +
1.8 cm18 mm <br />0.018 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
spheric +
not dendroid +
brownish +, yellow-green +  and green +
0 cm0 mm <br />0 m <br /> (12 cm120 mm <br />0.12 m <br />) +
M. affine var. rugicum +  and Plagiomnium rugicum +
Plagiomnium ellipticum +
Plagiomnium +
species +