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A Trichodon Moss - Trichodon cylindricus

Status Under Review
Native Species

Global Rank: G4G5
State Rank: SNR

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:

External Links





 
General Description
Plants: Growing in open cushions or turfs of erect shoots (Crum & Anderson et al. 1981), pale green or green with yellow tones. Stems 2-4 mm in length (FNA 2007), mostly unbranched (Crum & Anderson et al. 1981); axillary hairs of 5 cells, 3 long transparent ones distally and 2 brown ones proximally, 2 hairs in a leaf axil; papillose rhizoids proximally (FNA 2007).

Leaves: A little curved and twisted when dry, 1-3 mm in length (FNA 2007), oblong (Crum & Anderson et al. 1981) or obovate, tapering to a long subula (Malcolm & Malcolm 2009); subula a little bent and spreading when dry, and spreading to ca 90 degrees when wet (Crum & Anderson et al. 1981), margins saw-toothed or finely so along the subula, strongly rolled inward to form a tube (tubulose); base wide and enveloping the stem; costa extending to the apex, occupying most of the far end of the subula, appearing papillose on the dorsal surface from overlapping and protuberant cell ends (FNA 2007).

Leaf Cells: Cells of the sheath large and fine-walled, the medial cells above the shoulders quadrangular, smaller above than at the base (FNA 2007), short and with moderately thick walls (Crum & Anderson et al. 1981); margins of 1 cell layer, sometimes 2 near the apex; costa of 2 cell layers, 4-5 layers at mid-leaf, typically with 1 row of stereid cells on the outer face (Lawton 1971).

Trichodon cylindricus var. cylindricus: Present in Montana (FNA 2007).

Trichodon cylindricus var. oblongus: Apparently unknown in Montana (FNA 2007).

Range Comments
North American Range

Variety cylindricus: AK, YT, BC and AB s to CA, ID and MT, ON to NL and NB, MI (FNA 2007). Known in Montana from Flathead, Glacier, Lake, and Lincoln Counties (Elliott 2016).

Variety oblongus: AK to NT (FNA 2007).


Observations in Montana Natural Heritage Program Database
Number of Observations: 2

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

Recency

 

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



Habitat
Variety cylindricus: Soil of exposed, disrupted habitats, such as fields, paths, road embankments. Elevation: 100-6560 feet (FNA 2007).

Variety oblongus: Soil of exposed, disrupted habitats; arctic regions (FNA 2007).

Reproductive Characteristics
Dioicous. Perichaetia and perigonia borne at stem ends (FNA 2007), the perigonia big (Crum & Anderson et al. 1981); perigonial leaf bracts orange at the bottom (Lawton 1971); perichaetial bracts similar to vegetative leaves. Seta 3-27 mm tall, reddish, spiraled when dry. Capsule cylindric, straight to a little bowed, carried beyond the perichaetial bracts (FNA 2007); peristome divisions 16, divided almost to the bottom into 2 or 3 thread-like and papillose parts (Crum & Anderson et al. 1981).

Specialized vegetative reproduction occasionally occurring as smooth, yellowish to brownish tubers of various shapes arising from rhizoids (FNA 2014).

Variety cylindricus: Seta 5-27 mm tall. Capsule usually inclined and a little bowed (occasionally straight) (FNA 2007).

Variety oblongus: Seta 3-13 mm tall. Capsule usually upright, straight to weakly bowed (FNA 2007).

References
  • Literature Cited AboveLegend:   View Online Publication
    • Crum, H.A. and L.E. Anderson. 1981. Mosses of Eastern North America. 2 volumes. Columbia University Press, New York. 1328 pp.
    • 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.
    • Malcolm, B., N. Malcolm, J. Shevock, and D. Norris. 2009. California Mosses. Nelson, New Zealand: Micro-Optics Press. 430 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.
    • Smith, A.J.E. 1980. The Moss Flora of Britain and Ireland. Cambridge University Press, Cambridge. 705 pp.
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A Trichodon Moss — Trichodon cylindricus.  Montana Field Guide.  .  Retrieved on , from