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A Dicranoweisia Moss - Dicranoweisia cirrata
General Description
Plants: Acrocarpous (Vitt 1988). Growing in crowded clumps or larger patches of upright shoots, pale to deep green, not shiny (FNA 2007). Stems 10-20 mm tall (Lawton 1971), branched; central strand present; rhizoids only at the bottom of the stem and anchoring the plant (FNA 2007).
Leaves: Wavy and curving up and inward when dry (FNA 2007), spreading ca 45 degrees or more when moist (Smith 1980), lance-shaped (FNA 2007), narrowed to an acute or slightly wider-angled leaf tip, 2-3 mm in length (Lawton 1971); leaf edges flat to broadly curved up and inward, sometimes curving back and downward at mid-leaf; costa nearly reaching the apex (FNA 2007).
Leaf Cells: Lamina of 1 cell-layer apart from the bi-stratose marginal cells above mid-leaf (FNA 2007) and the rarely bi-stratose laminal cells near the apex (Lawton 1971), the cells smooth (FNA 2007), with thick cross walls similar in appearance to papillae (Lawton 1971); lower cells somewhat long; upper cells nearly square; alar cells not distinct from adjacent cells (FNA 2007); costa in X-section with a small abaxial stereid band and guide cells (Lawton 1971).
Phenology
Fruit ripens autumn through winter (FNA 2007).
Range Comments
North American Range
AK, BC s to CA and AZ, also ID and MT (FNA 2007). Known in Montana from Cascade, Flathead, Missoula, Park, Sweet Grass, and Park Counties (Elliott & Pipp, 2016).
Observations in Montana Natural Heritage Program Database
Number of Observations: 6
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Relative Density
Recency
(Observations spanning multiple months or years are excluded from time charts)
Habitat
Trees, fence posts, logs (Elliott & Pipp, 2016), seldom on stone (Lawton 1971) or in stone fissures. Elevation: 3-6230 feet (FNA 2007).
Reproductive Characteristics
Autoicous. Perigonial bracts suddenly constricting to a subula. Seta single (FNA 2007), 5-10 mm tall (Lawton 1971). Capsule pale to deep brown when ripe, smooth or furrowed lengthwise when dry (FNA 2007); theca 1.2-1.8 mm in length (Lawton 1971); peristome with 16 russet teeth, the tips transparent, sometimes split above, smooth below, papillose above (FNA 2007).
Specialized vegetative reproduction occurring often by several-celled gemmae borne on the dorsal leaf face (FNA 2007) close to the base (Lawton 1971), the gemmae somewhat oblong to linear (FNA 2007).
References
- 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.- Smith, A.J.E. 1980. The Moss Flora of Britain and Ireland. Cambridge University Press, Cambridge. 705 pp.
- Vitt, D. J. Marsh, and R. Bovey. 1988. Mosses, Lichens & Ferns of Northwest North America. Seattle, WA: University of Washington Press. 296 p.
- Additional ReferencesLegend: View Online Publication
Do you know of a citation we're missing?- Elliot, J. C. 1993. Second checklist of Montana mosses. Unpublished report. U.S. Forest Service, Region 1. Missoula, MT. 45 pp.
- 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.
- Malcolm, B., N. Malcolm, J. Shevock, and D. Norris. 2009. California Mosses. Nelson, New Zealand: Micro-Optics Press. 430 pp.
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