(Sullivant) Mitten

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

Etymology: Greek pleura, side, and ozos, branch, alluding to pinnate branching
Basionym: Hypnum sect. Pleurozium Sullivant in A. Gray, Manual ed. 2, 668. 1856
Treatment appears in FNA Volume 28. Treatment on page 334. Mentioned on page 326, 647.

Stems creeping to erect-ascending, 1–3 mm wide across leafy stem, monopodial, irregularly to regularly 1 (or 2)-pinnate; paraphyllia absent. Stem leaves loosely appressed to spreading, heteromallous, not falcate-secund, distinctly crowded and imbricate at stem apices, ovate to elliptic, wrinkled when dry, not plicate or rugose when moist, 1.5–2.8 mm; base short-decurrent; margins entire except at apex; apex rounded to obtuse, often appearing bluntly apiculate because of broadly incurved margins; costa double to nearly ecostate, less than 1/4 leaf length; alar cells differentiated; laminal cells smooth. Branch leaves elliptic to lanceolate. Capsule inclined to horizontal; operculum conic; exostome teeth reticulate proximally; endostome segments broadly perforate.


North America, Mexico, Central America, South America, Eurasia, Africa, Atlantic Islands, cool temperate to subarctic zones.


Species 2 (1 in the flora).

Pleurozium quitense (Mitten) B. H. Allen & Magill is found in the Andes mountain range of Bolivia, Ecuador, and Peru.

Selected References


... more about "Pleurozium"
Joseph R. Rohrer +
(Sullivant) Mitten +
Hypnum sect. Pleurozium +
North America +, Mexico +, Central America +, South America +, Eurasia +, Africa +, Atlantic Islands +  and cool temperate to subarctic zones. +
Greek pleura, side, and ozos, branch, alluding to pinnate branching +
J. Linn. Soc., Bot. +
Pleurozium +
Hylocomiaceae +