Pleurozium schreberi

(Willdenow ex Bridel) Mitten

J. Linn. Soc., Bot. 12: 537. 1869

Basionyms: Hypnum schreberi Willdenow ex Bridel Muscol. Recent. 2(2): 88. 1801
Synonyms: Calliergon schreberi (Willdenow ex Bridel) Mitten Calliergonella schreberi (Willdenow ex Bridel) Grout C. schreberi var. tananae (Grout) Grout Pleurozium schreberi var. tananae (Grout) Wijk & Margadant
Treatment appears in FNA Volume 28. Treatment on page 334. Mentioned on page 325.
Plants to 16 cm. Stems reddish, distinctly visible through wet leaves. Stem leaves moderately concave, 0.8–1.5 mm wide; apex often recurved; alar cells few, orange-brown, quadrate to oblong, slightly enlarged, 18–40 × 12–28 µm; medial laminal cells 50–100 × 6–9 µm; apical cells obviously shorter. Branch leaves concave, 0.8–1.9 × 0.3–0.8 mm. Seta 1.5–4.3 cm. Capsule ellipsoid, 1.5–2.5 mm.

Habitat: Soil, humus, rock, often covering forest floor in extensive mats, forest types from dry oak/pine/aspen to wet spruce muskeg, sometimes in bogs, fens, and grass balds, rarely in tundra
Elevation: low to high elevations (0-3000 m)


V28 521-distribution-map.gif

Greenland, St. Pierre and Miquelon, Alta., B.C., Man., N.B., Nfld. and Labr., N.W.T., N.S., Nunavut, Ont., P.E.I., Que., Sask., Yukon, Ala., Alaska, Ark., Colo., Conn., Ga., Idaho, Ill., Ind., Iowa, Ky., Maine, Md., Mass., Mich., Minn., Mo., Mont., Nebr., N.H., N.J., N.Mex., N.Y., N.C., Ohio, Oreg., Pa., R.I., S.Dak., Tenn., Vt., Va., Wash., W.Va., Wis., Wyo., Mexico, Central America, South America, Eurasia, Africa, Atlantic Islands.


Plants of Pleurozium schreberi are generally forest dwellers and rarely inhabit Arctic tundra. Arctic specimens often have long, slender, sparsely branched stems. An extreme example is the nomenclatural type of the var. tananae. In addition to the reduced branching and slender stems, its leaves are appressed-imbricate and somewhat smaller than the typical range for the species given in the description above. The distal leaf margins are slightly inrolled, so the apex appears obtuse to rounded rather than apiculate. Such specimens from Arctic tundra may be interpreted as rare forms of the species induced by the lower nutrient and harsher climatic conditions present outside of the normal forest habitat.

Selected References


Lower Taxa


Facts about "Pleurozium schreberi"
AuthorJoseph R. Rohrer +
Authority(Willdenow ex Bridel) Mitten +
BasionymsHypnum schreberi +
DistributionGreenland +, St. Pierre and Miquelon +, Alta. +, B.C. +, Man. +, N.B. +, Nfld. and Labr. +, N.W.T. +, N.S. +, Nunavut +, Ont. +, P.E.I. +, Que. +, Sask. +, Yukon +, Ala. +, Alaska +, Ark. +, Colo. +, Conn. +, Ga. +, Idaho +, Ill. +, Ind. +, Iowa +, Ky. +, Maine +, Md. +, Mass. +, Mich. +, Minn. +, Mo. +, Mont. +, Nebr. +, N.H. +, N.J. +, N.Mex. +, N.Y. +, N.C. +, Ohio +, Oreg. +, Pa. +, R.I. +, S.Dak. +, Tenn. +, Vt. +, Va. +, Wash. +, W.Va. +, Wis. +, Wyo. +, Mexico +, Central America +, South America +, Eurasia +, Africa + and Atlantic Islands. +
Elevationlow to high elevations (0-3000 m) +
HabitatSoil, humus, rock, often covering forest floor in extensive mats, forest types from dry oak/pine/aspen to wet spruce muskeg, sometimes in bogs, fens, and grass balds, rarely in tundra +
IllustrationPresent +
Illustration copyrightFlora of North America Association +
IllustratorPatricia M. Eckel +
Publication titleJ. Linn. Soc., Bot. +
Publication year1869 +
ReferenceNone +
Source xml grained fna xml/V28/V28 521.xml +
Special statusIllustrated +
SynonymsCalliergon schreberi +, Calliergonella schreberi +, C. schreberi var. tananae + and Pleurozium schreberi var. tananae +
Taxon familyHylocomiaceae +
Taxon namePleurozium schreberi +
Taxon parentPleurozium +
Taxon rankspecies +
VolumeVolume 28 +