The World Flora Online

Plants somewhat stiff. Stems with shoot and branch apices often pale; paraphyllia sometimes present only in youngest shoot portions; axillary hairs few, weak. Stem leaves gradually or suddenly narrowed to apex, plane or slightly concave; alar cells usually many, region large, usually strongly widened marginally, reaching from margin to costa or almost so; medial laminal cells 12-55 × 4-11 µm. Branch leaves usually narrower, more strongly falcate. Perichaetia with inner leaves gradually or suddenly narrowed to apex, plicate, margins denticulate or strongly so distally, apex acuminate, laminal cells smooth.

Source: [
• 1
]. 

Source: [
• 2
]. 

Plants medium-sized, rarely smaller; green, yellowish green, or occasionally brownish, often with pale shoot and branch apices. Stem somewhat stiff; pinnately or irregularly branched, occasionally almost unbranched; pseudoparaphyllia rounded to triangular; paraphyllia lanceolate or ovate-lanceolate, numerous or few, rarely absent in weak shoots; axillary hairs weak and infrequent, not more than one per axil, with 1-2-celled upper part, this hyaline; rhizoids frequently strongly branched, abundant, forming tomentum. Stem leaves straight or falcate (gradually curved), narrow- to broad-triangular or rounded-triangular to ovate, narrowing gradually to rather abruptly to acumen, not or hardly plicate, plane or slightly concave, decurrent; margin denticulate or serrulate almost throughout, rarely entire; costa strong, (42.0-)52.5-126.0 µm wide near base (outside the area to 157.0 µm), ending in leaf apex or excurrent, rarely ending slightly below leaf apex; median laminal cells 12.0-62.0 × 4.0-12.5 µm, somewhat incrassate, eporose; alar cells differentiated, usually numerous, strongly widened, hyaline; alar group well defined, transverse-triangular, widest toward leaf margin (except when modified by running water), reaching or nearly reaching costa. Branch leaves usually narrower and more falcate than stem leaves. Inner perichaetial leaves narrowing gradually or ± abruptly to acuminate apex. Exostome outside cross-striolate in lower part. [Sporophytes not known from neotropical material.]

Source: [
• 4
]. 

Plants medium-Sized to fairly robust, soft or rather rigid, extensive cushions up to about 12 cm high but usually considerably less, green, yellowish, or brownish, somewhat radiculose below and radiculose in tufts well up the stems. Stems spreading or, more often crowded and erect-ascending, irregularly or, more often, pinnately branched; paraphyllia usually none or very few but sometimes fairly numerous, variously lanceolate. Stem leaves erect, erect-spreading, or sometimes secund or falcate-secund, ± striate, 1-1.8 mm long, ovate-lanceolate to broadly ovate, rather abmptly acuminate; margins often somewhat recurved at the extreme base, serrulate nearly all around (in the acumen ±entire); costa rather strong, percurrent or ending in the acumen somewhat below the apex, rarely filling the acumen; cells smooth, firm-walled, shortly oblong-rhomboidal, about 3-5:1; alar cells abmptly differentiated and hyaline or yellow-brown, thin-or thick-walled in concave groups. Branch leaves shorter and narrower, usually ± falcate-secund. Setae 25-35 mm long; capsules 2-2.5 mm long; operculum convex-conic, apiculate or short-rostrate; cilia in 3s and 4s. Spores 15-18 µm, very finely roughened.

Source: [
• 9
]. 

Plants somewhat stiff. Stems with shoot and branch apices often pale; paraphyllia sometimes present only in youngest shoot portions; axillary hairs few, weak. Stem leaves gradually or suddenly narrowed to apex, plane or slightly concave; alar cells usually many, region large, usually strongly widened marginally, reaching from margin to costa or almost so; medial laminal cells 12-55 x 4-11 µm. Branch leaves usually narrower, more strongly falcate. Perichaetia with inner leaves gradually or suddenly narrowed to apex, plicate, margins denticulate or strongly so distally, apex acuminate, laminal cells smooth.

Source: [
• 3
]. 

Moist or wet habitats in calcareous districts, rock, tree bases beside streams, springs, moist soil, calcareous fens.

Source: [
• 3
]. 

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., Idaho, Ill., Ind., Iowa, Mich., Minn., Mo., Mont., Nev., N.H., N.Mex., N.Y., N.C., N.Dak., Ohio, Oreg., Pa., S.Dak., Tenn., Tex., Utah, Wash., Wis., Wyo.; Mexico (Baja California, México, Oaxaca, San Luis Potosí); South America; Eurasia; Africa; Atlantic Islands; Pacific Islands (New Zealand).

Source: [
• 3
]. 

In calcareous seepage; Baja California, Mexico, Oaxaca, San Luis Potosi.—Mexico; Guatemala; Newfoundland to Alaska, south to North Carolina, Texas and New Mexico; Europe, Asia, Japan; reported from Ecuador, North Africa and New Zealand.

Source: [
• 9
].