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An Orthotrichum Moss - Orthotrichum elegans
Other Names:  Orthotrichum speciosum var. elegans


Global Rank: G5T5
State Rank: SNR

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General Description
Plants: Acrocarpous, growing in rather crowded clumps of upright shoots (FNA 2014), deep green to occasionally brown (Crum and Anderson et al. 1981). Stems sometimes reaching 22 mm in height (FNA 2014).

Leaves: Somewhat rigid, twisted and bent when dry, spreading, sometimes broadly, when damp, 2.3-3 mm in length, lance-shaped, occasionally slenderly so (FNA 2014), narrowing to the acute leaf tip or the leaf tip widely acuminate; leaf edges smooth, tightly rolled back almost to the leaf tip (FNA 2014).

Leaf Cells: Upper lamina of 1 cell-layer (FNA 2014), the cells chlorophyllous (Crum and Anderson et al. 1981), somewhat round and isodiametric (FNA 2014), with 1 or 2 small, cone-shaped papillae over each lumen; lower laminal cells somewhat long with thick, knobby walls (FNA 2014).

Diagnostic Characteristics
Variety elegans is small, has stems crowded, and capsules smooth and partially emerged to only slightly exserted. The typical variety grows in more open clumps, and has faintly 8-ribbed capsules with the capsules completely beyond the perichaetial bracts (FNA 2014). Additionally, the leaves are shorter and the capsules more slender in variety elegans (Crum and Anderson et al. 1981).

Range Comments
North American Range

AK, NT, BC to NL and NS, MO, MN to MI, OH to RI, NH and ME (FNA 2014). Known in Montana from Flathead and Golden Valley Counties (Elliott and Pipp 2016).


Habitat
On bark of evergreens, cottonwoods and other deciduous trees, occasionally on logs, wooden fences, and stones (Crum and Anderson et al. 1981). Elevation: approximately 660-3280 feet (FNA 2014).

Reproductive Characteristics
Autoicous. Seta twisted, 1-2 mm tall. Capsule 1.3-2 mm in length, partially emerged or exserted a small amount beyond the perichaetial bracts, without longitudinal ribs (FNA 2014), seldom obscurely pleated when dry (Crum and Anderson et al. 1981); stomata occurring at the capsule surface; exostome of 8 teeth, split to the bottom, curving back and downward (FNA 2014) or curved inward when dry (Crum and Anderson et al. 1981), with rough papillae; endostome processes 8, typically persistent throughout the capsuleā€™s old age, with rough papillae. Calyptra cone-shaped, sheltering the full length of the capsule, with a few minutely-papillose hairs (FNA 2014).

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. 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. 2014. Flora of North America North of Mexico. Volume 28. Bryophytes: Mosses, Part 2. Oxford University Press, Inc., NY. xxi + 702 pp.
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Citation for data on this website:
An Orthotrichum Moss — Orthotrichum elegans.  Montana Field Guide.  .  Retrieved on , from