Orthotrichum affine |
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orthotrichum moss, wood bristle-moss |
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Habit | Plants to 3 cm. |
Stem | leaves erect-appressed and straight when dry, ligulate, elongate- to ovate-lanceolate, 2–4 mm; margins recurved-revolute to just below apex, entire; apex acute; basal laminal cells long-rectangular to elongate, walls thick, nodose; distal cells 9–13 µm, 1-stratose, papillae 2 or 3 per cell, 2-fid, low. |
Seta | 1–2.2 mm. |
Sexual condition | gonioautoicous. |
Capsule | 1/2 emergent to short-exserted, long-cylindric when mature, cylindric and constricted along entire length when old and dry, 1.6–2.5 mm, strongly 8-ribbed 2/3 capsule length; stomata superficial; peristome double; prostome absent; exostome teeth 8, erect when mature, reflexed to reflexed-recurved when old, coarsely and obscurely papillose or sometimes papillose-reticulate, deeply perforate, cancellate; endostome segments 8, rarely 16, well developed, usually present when capsule is old and dry, narrow, of 2 rows of cells, papillose. |
Calyptra | conic-oblong, smooth, hairs few, papillose. |
Spores | 15–18 µm. |
Specialized | asexual reproduction absent. |
Orthotrichum affine |
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Habitat | Deciduous trees, shaded rock, shaded forests near stream beds, canyons, mountains |
Elevation | low to high elevations (0-3000 m) (low to high elevations (0-9800 ft)) |
Distribution |
CA; CO; ID; MT; OR; UT; WA; AB; BC; Europe; Asia; n Africa
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Discussion | Orthotrichum affine, a species confined to western North America in the flora area, is best recognized by: superficial stomata; cylindric, strongly ribbed, almost exserted capsules; a well-developed but not stout endostome; and a calyptra that is only sparsely hairy. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 28, p. 50. |
Parent taxa | Orthotrichaceae > Orthotrichum |
Sibling taxa | |
Name authority | Schrader ex Bridel: Muscol. Recent. 2(2): 22. (1801) |
Web links |