Fissidens grandifrons Brid.
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Authority
Sharp, Aaron J., et al. 1994. The Moss Flora of Mexico. Part One: Sphagnales to Bryales. Mem. New York Bot. Gard. 69 (1): 1-452.
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Family
Fissidentaceae
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Scientific Name
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Description
Species Description - Plants usually submerged, dark-green to brown-black, often encrusted with lime and coarse to the touch, much branched, up to 10 cm or more in length. Leaves opaque, imbricate, little shrunken when dry, lanceolate, rounded acute to obtuse, up to 3 mm in length; margins unbordered, ± entire; costa strong, ending below the apex; dorsal lamina gradually narrowed below, ending at the insertion; vaginant laminae 1/2-2/3 the leaf length; cellsbitomultistratose within, unistratose near the margins, particularly in the vaginant laminae, 7-13 µm long. [Sporophytes rare (not seen in Mexican material), lateral from upper leaf axils; setae up to 1.5 cm long; capsules erect and symmetric or nearly so, oblong, about 1.2 mm long; opercula conic-rostrate, about 1 mm long; peristome teeth deeply inserted, the divisions rough. Spores 15-24 µm. - From Grout, 1943.]
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Discussion
Fig. 59c-f
F. grandifrons Brid., Muscol. Recent. Suppl. 1: 170. 1806.
F. insignis Schimp. ex C. Mull., Bot. Zeitung 22: 339. 1864.
F. grandifrons var. str ictus Besch., Mem. Soc. Sci. Nat. Cherbourg 16: 171.1872.
F. diversiretis sensu Grout, N. Amer. Fl. 15(3): 199. 1943, non Broth. 1929.
Fissidens grandifrons is distinctive because of its aquatic habitat, dark-green to brown-black color, and stiff, multistratose leaves.
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Distribution
On wet rocks or submerged in streams in calcareous regions at moderate elevations (up to 2250 m); Oaxaca, Sonora, Veracruz.—Mexico; Guatemala; North America from southern British Columbia, Alberta, and southern Ontario south to California, Nevada, Wyoming, and Tennessee; Europe, Asia, and Africa.
Mexico North America| Guatemala Central America| United States of America North America| Canada North America| Europe| Africa| Africa|