A Cynodontium Moss - Cynodontium tenellum
Plants: Acrocarpous, growing in tufts, with many rhizoids below (Lawton 1971). Stems upright, (0.5)1-2(-3) cm (FNA 2007).
Leaves: Curled and contorted when dry, upright-spreading when wet (Lawton 1971), narrowly-lanceolate, 2-3(-3.5) mm; apex essentially acute; margin lightly curved under for a portion of the leaf or occasionally almost flat, 2(-3)-layered (FNA 2007), finely toothed near apex (Lawton 1971); costa single, smooth proximally, or sometimes toothed abaxially in the apical end from protruding cell ends, guide cells occurring in one row in x-section (FNA 2007).
Leaf Cells: Laminal cells with small bumps (papillae) well-dispersed or smooth; basal cells long-rectangular, about 5:1; alar region faintly differentiated if at all; medial and distal laminal cells short and rectangular, plumply quadrate, or irregular, usually 2:1, wider and longer near costa (FNA 2007), the median cells from almost smooth to papillose (Lawton 1971).
Capsules ripen in summer (FNA 2007).
Some authors regard Cynodontium alpestre to be a variant of C. tenellum; the distribution of neither species in the United States is well understood (FNA 2007).
Greenland; Canada: AB, BC, MB, NL, NT, NS, NU, ON, QC, SK, YT; USA: AK, ME, MN, MT, SD; Eurasia; Atlantic Islands (Iceland) (FNA 2007). In Montana: Beaverhead and Cascade Counties (Elliott 2016).
Rocks and crevices (Elliott 2016).
Autoicous; the perigonia stalkless (FNA 2007). Seta straight whether dry or moist, (5)6-7(-10) mm in height. Capsule upright and straight, hood-like, lacking any swelling at the base (FNA 2007).
- Literature Cited AboveLegend: View Online Publication
- Elliott, J.C. and A.K. Pipp. 2018. A Checklist of Montana Mosses (1880-2018). Updated 3 January, 2020. Montana Natural Heritage Program, Helena, Montana. 73 pp.
- Flora of North America Editorial Committee, eds. 2007. Flora of North America North of Mexico. Volume 27. Bryophytes: Mosses, Part 1. Oxford University Press, Inc., NY. xxi + 713 pp.
- Lawton, E. 1971. Moss Flora of the Pacific Northwest. Hattori Botanical Laboratory. Japan: Yamabuki-cho, Shinjuku-ku, Tokyo. 362 pages plus appendices.
- Additional ReferencesLegend: View Online Publication
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- Lawton, E. 1971. Keys for the Identification of the Mosses on the Pacific Northwest. Reprinted from 'Moss Flora of the Pacific Northwest'. Published as Supplement No. 2 of the Journal of the Hattori Botanical Laboratory. Nichinan, Miyazaki, Japan. 66 pp.