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A Syntrichia Moss - Syntrichia princeps
Other Names:  Tortula princeps


Global Rank: G5?
State Rank: SNR

Agency Status
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BLM:
MNPS Threat Rank:

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General Description
Plants: Acrocarpous (Vitt 1988). Growing in upright, crowded clumps or patches of upright shoots, green distally, russet below (Smith 1980). Stems 1-4 cm tall (occasionally taller), frequently forked, sometimes with a central strand present (Lawton 1971).

Leaves: Incurved, slightly contorted and spiraled around the stem to varying degrees when dry, curved outwardly to broadly spreading when wet, 2-4 mm in length, 1-1.5 mm in width, cupped, spatula-shaped; margins tightly rolled out and downward proximally up to 3/4 of the leaf length; leaf tips acute or sometimes cut off abruptly; costa extending into a long, saw-toothed awn, the awn mostly transparent except for the red base (FNA 2007).

Leaf Cells: Basal cells large, transparent, smooth, and fine-walled, nearly square or a little rectangular near the margins, longer interiorly, well-demarcated from the cells above; upper cells nearly square to 6-sided, somewhat swollen, each with 4-6 papillae (FNA 2007); costa in X-section with 2 guide cells, 2 adaxial cell layers, and a strong abaxial stereid band (Lawton 1971).

Diagnostic Characteristics
T. princeps differs from T. ruralis, T. papillosissima, and T. norvegia by its synoicous state (if present); otherwise by broader basal cells, and the presence of a central strand (if present) (FNA 2007).

Range Comments
North American Range

Canada: BC; USA: states west of and including MT s to AZ; Mexico (FNA 2007). In Montana, known from Flathead, Lake, Lincoln, Missoula, Park, and Ravalli Counties (Elliott 2016).


Habitat
Tree bark, soil (FNA 2007) and basic rock, on bluffs (Smith 1980). Elevation: low to medium (FNA 2007).

Reproductive Characteristics
Archegonia and antheridia usually in the same inflorescence, but apparently on separate plants occasionally. Seta 1-1.8 cm tall, red. Capsule 3-4 mm in length, russet, a little bowed, with a conspicuous neck, the peristome’s 32 reddish and papillose thread-like divisions spiraled ca 2 revolutions (FNA 2007).

Specialized vegetative propagula unknown (FNA 2007).

References
  • Literature Cited AboveLegend:   View Online Publication
    • Elliott, J. and A. Pipp. 2016 (forthcoming). Checklist of Montana Mosses. Revised 2016. Prepared by the Montana Natural Heritage Program, Helena, Montana. 90 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
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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.
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A Syntrichia Moss — Syntrichia princeps.  Montana Field Guide.  .  Retrieved on , from