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Montana Field Guide

Montana Field Guides

Schreber's Dicranella Moss - Dicranella schreberiana
Other Names:  Schreber's Fork Moss, Dicranella grevilleana

Species of Concern
Native Species

Global Rank: G5
State Rank: S1
(see State Rank Reason below)

Agency Status
MNPS Threat Rank:

External Links

State Rank Reason (see State Rank above)
D. grevilleana had previously been ranked S1, but is now a synonym for D. schreberiana. Until a full review of the species can be performed, D. schreberiana (previously unranked) will be given the rank assigned to D. grevilleana.
General Description
Plants: Growing in tufts, green or with yellow tones (Lawton 1971). Stems 5-20 mm (seldom taller) (FNA 2007).

Leaves: 3 mm or fewer in length; base clasping the stem, obovate to nearly rectangular, narrowing suddenly to the contorted limb (upper leaf); limb spreading up to 90 degrees, the apex slender, obtuse to acute; margins smooth or toothed distally; midrib extending to apex or just beyond, the outer side toothed distally (FNA 2007).

Leaf Cells: Rectangular, 2-3:1, smooth, not porose, with occasionally uneven walls; alar cells undifferentiated (FNA 2007). Previously D. grevilleana

Capsules ripen in fall (FNA 2007 as D. grevilleana).

Species Range

Range Comments
In Britain and Ireland, c and n Europe, Iceland, Caucasus, Siberia and North America (Smith 1978). Canada: AB, BC, MB, NB, NL, NT, NS, ON, QC, YT; USA: AK, CA, CO, ID, ME, MA, MI, MT, NJ, NY, OH, OR, PA, SD, UT, WA, WI, WY; n, c Europe; Japan; New Zealand; Australia (FNA 2007). In Montana: Flathead and Glacier Counties (Elliott 2016 as D. grevilleana).

Observations in Montana Natural Heritage Program Database
Number of Observations: 5

(Click on the following maps and charts to see full sized version) Map Help and Descriptions
Relative Density



(Observations spanning multiple months or years are excluded from time charts)

Damp soil (Elliott 2016 as D. grevilleana) of banks, ditches, cliff fissures. Elevation: medium to high (FNA 2007 as D. grevilleana).

Reproductive Characteristics
Dioicous (also allegedly autoicous) (FNA 2007 as D. grevilleana). Seta red, single, 7-12(-25) mm, smooth, spiraling when dry. Capsule curved, inclined, 0.8-1 mm; operculum curved and long-beaked (FNA 2007 as D. grevilleana).

  • 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.
  • Additional ReferencesLegend:   View Online Publication
    Do you know of a citation we're missing?
    • 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. 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.
    • 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.
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Citation for data on this website:
Schreber's Dicranella Moss — Dicranella schreberiana.  Montana Field Guide.  .  Retrieved on , from