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Montana Field Guide

Montana Field Guides

Curly Boat Moss - Hygrohypnum ochraceum

Native Species

Global Rank: G5
State Rank: SNR

Agency Status


External Links

General Description
Plant: Loose or dense mats. Green to yellow-green or brown. Stems 2-8 cm long, branching irregularly. X-S of stem with a small central strand and large, hyaline cortical cells.

Leaf: Leaves falcate to secund or sometimes straight, ovate-lanceolate, oblong-ovate, or oblong-lanceolate, 1-2 x 0.3-1 mm, concave, usually rounded to the base, and slightly decurrent. Apex more-or-less obtuse. Margins plane and usually denticulate near the apex. Costa single or usually double and short or frequently to mid-leaf or longer.

Leaf Cells: Median leaf cells 45-95 x 4-6 ┬Ám. Apical cells shorter. Basal cells shorter and broader in several rows, sometimes with thicker walls, but not pitted. Alar cells inflated and hyaline.

Range Comments
Greenland; Canada: AB, BC, NB, NL, NS, ON, QC, YT; USA: AK, AZ, CA, CO, CT, ID, ME, MD, MA, MI, MT, NH, NJ, OR, PA, RI, UT, VT, VA, WA, WV, WY; Europe; Asia; Atlantic Islands (Iceland) (FNA 2014). In Montana: Beaverhead, Carbon, Flathead, Glacier, Jefferson Lake, Lincoln, Mineral, Park,
Ravalli, and Sanders Counties (Elliott 2016).

Observations in Montana Natural Heritage Program Database
Number of Observations: 54

(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)

On soil or stones, occasionally on rotten wood, in or along streams. From low elevations to about 13,125 feet.

Reproductive Characteristics
Dioicous. Seta to 2 cm tall. Capsule arcuate and 2-2.5 mm long.

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