Cratoneuron filicinum

(Hedwig) Spruce

Cat. Musc., 21. 1867.

Basionym: Hypnum filicinum Hedwig Sp. Musc. Frond., 285, plate 76, figs. 5–10. 1801
Synonyms: Amblystegium tenax var. spinifolium (Schimper) H. A. Crum & L. E. Anderson Cratoneuron filicinum var. aciculinum (Müller Hal. & Kindberg) Grout
Treatment appears in FNA Volume 28. Treatment on page 267. Mentioned on page 302, 305.

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.

Habitat: Moist or wet habitats in calcareous districts, rock, tree bases beside streams, springs, moist soil, calcareous fens
Elevation: low to high elevations


V28 419-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., 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).


Strikingly rigid plants of Cratoneuron filicinum with extremely strong, often long-excurrent costae are sometimes found in streams or under heavily dripping water; these were sometimes recognized as Amblystegium tenax var. spinifolium in North America. Such plants have narrowly triangular or narrowly ovate-triangular leaves gradually narrowed to an acuminate or often obtuse point. Ordinary C. filicinum leaves are sometimes found in parts of such plants, or shoots on old plants of this kind may have a normal C. filicinum appearance. Molecular studies show that such plants likely represent habitat modifications and should therefore not be recognized taxonomically (L. Hedenäs 2011, 2012). Cratoneuron curvicaule (Juratzka) G. Roth was attributed to North America by H. A. Crum et al. (1973) as C. filicinum var. curvicaule (Juratzka) Mönkemeyer; the species has been considered a synonym of C. filicinum on several American web pages. However, as shown by Hedenäs (2003, 2011), this is a distinct species that differs both morphologically and molecularly from C. filicinum. The occurrence of C. curvicaule in North America has not been confirmed, and the only North American specimens referred to this species (H. G. Simmons 584 [in part] and 585, S) belong to C. filicinum.

Selected References


Lower Taxa

... more about "Cratoneuron filicinum"
Lars Hedenäs +
(Hedwig) Spruce +
Hypnum filicinum +
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 +  and Pacific Islands (New Zealand). +
low to high elevations +
Moist or wet habitats in calcareous districts, rock, tree bases beside streams, springs, moist soil, calcareous fens +
Cat. Musc., +
Illustrated +
Amblystegium tenax var. spinifolium +  and Cratoneuron filicinum var. aciculinum +
Cratoneuron filicinum +
Cratoneuron +
species +