A Pseudoleskea Moss - Pseudoleskea radicosa
MNPS Threat Rank
Plants: Growing in dense mats, green, sometimes with yellow or orange tints. Stems with coarse, catkin-like branches (FNA 2014), up to 10 cm, their tips usually curved; rhizoids several to numerous (Lawton 1971), growing in bunches from leaf stem bases; possessing a central strand and numerous branched, threadlike or foliose paraphyllia (FNA 2014).
Leaves: Flattened to the stem when dry, erect-spreading when wet, shiny or not, ovate to lance-shaped, 0.6-2.4 mm in length (FNA 2014), 0.25-1 mm in width, sickle-shaped (Lawton 1971), sometimes turned in the same direction (second); apex narrowing suddenly to become acuminate, the acumen long or short but lacking a hairpoint (FNA 2014), frequently toothed; margins smooth (Lawton 1971), turned under slightly in the bottom half or to nearly as far as the acumen; costa reaching the apex or nearly so, occasionally wavy, lime-green. Leaves of stems and branches similar (FNA 2014).
Leaf Cells: Alar cells nearly square to becoming more elongate crosswise; medial laminal cells varying from 4-angled with short sides to elliptic or spindle-shaped, mostly 2-3:1 (or up to 4:1), the walls unpitted and usually thin (FNA 2014).
Capsules ripen in summer (FNA 2014).
P. radicosa has laminal cells that are longer, broader and more thinly walled than the closely-related P. incurvata (FNA 2014).
Greenland; North America: AK, YT, BC and AB, s to CA, AZ, and NM. Also QC, NL, MI and NH; Eurasia; Iceland (FNA 2014). Known in Montana from Carbon, Cascade, Flathead, Gallatin, Glacier, Lake, Lincoln, Madison, Missoula, Park, Ravalli, and Sweet Grass Counties (Elliott 2016).
Dioicous. Capsules 1-2 mm in length, upright to nearly so (FNA 2014), brown or reddish-brown (Lawton 1971).
No specialized vegetative reproduction (FNA 2014).
- 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. 2014. Flora of North America North of Mexico. Volume 28. Bryophytes: Mosses, Part 2. Oxford University Press, Inc., NY. xxi + 702 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.