Orthotrichum rupestre |
Orthotrichum lescurii |
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orthotrichum moss, rock bristle-moss |
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Habit | Plants (1–)3–12.5 cm, light green to olive green. | Plants to 1 cm, dull. |
Stem | leaves stiff, erect-appressed when dry, narrowly lanceolate to ovate-lanceolate, 2–4.5 mm; margins recurved to narrowly revolute to near apex, entire; apex sharply to slenderly acute; basal laminal cells elongate to rectangular, walls thick, ± nodose; distal cells 6–13 µm, 1-stratose, papillae 1 or 2 per cell, conic and small, or 2-fid and low. |
leaves stiff, erect-appressed when dry, narrowly lanceolate to lanceolate, 2–2.5 mm; margins revolute to just below apex, entire; apex acute; basal laminal cells quadrate to rectangular, walls thin, not nodose; distal cells 8–12 µm, 1-stratose, papillae 1–3 per cell, conic, small. |
Seta | to 1.8 mm. |
0.5–0.7 mm. |
Sexual condition | gonioautoicous. |
gonioautoicous. |
Capsule | immersed, emergent, or slightly exserted, usually 1/3 emergent, globose ovate, ovate-oblong, or short-oblong, 1.3–1.8 mm, slightly or distinctly 8-ribbed 1/2–2/3 length; stomata superficial; peristome single, rarely double; prostome large, conspicuous, or rudimentary; exostome teeth 16, erect or sometimes spreading-recurved when old, smooth, scattered-papillose, or coarsely papillose-granulate; endostome segments absent, or rarely 8, rudimentary, of 1 row of cells, smooth or roughened. |
immersed, ovate, 1.1–1.8 mm, distinctly 8-ribbed, constricted below mouth when dry; stomata immersed; peristome single; prostome small or absent; exostome teeth 8, incurved-erect to spreading-recurved when dry, finely, densely papillose; endostome segments absent. |
Calyptra | oblong, smooth, hairy or rarely naked, hairs finely papillose. |
oblong-conic, smooth, hairy, hairs papillose. |
Spores | 13–21 µm. |
12–16 µm. |
Specialized | asexual reproduction absent. |
asexual reproduction absent. |
Orthotrichum rupestre |
Orthotrichum lescurii |
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Habitat | Non-calcareous boulders and cliff faces in mesic areas of pine, spruce-fir, or aspen forests, base of trees, subalpine shade | Calcareous rock |
Elevation | low to high elevations (100-3000 m) (low to high elevations (300-9800 ft)) | low to moderate elevations (0- 1500 m) (low to moderate elevations (0- 4900 ft)) |
Distribution |
AK; AZ; CA; CO; ID; MT; NM; NV; OR; SD; UT; WA; WY; AB; BC; NT; NU; ON; YT; South America; e Africa; Pacific Islands (New Zealand); Atlantic Islands (Canary Islands); Greenland; n Africa; e Asia (Japan); Europe; Australia
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CT; GA; IN; MA; MD; ME; MI; MN; MO; NJ; NY; VA; VT; WV; ON |
Discussion | In typical form, Orthotrichum rupestre is characterized as much-branched plants in loose tufts with lanceolate leaves, apex narrowly and bluntly acute, basal cells elongate, thick-walled, and nodose, yellowish in older leaves, capsule oblong, emergent, 8-ribbed to mid capsule when old and dry, smooth or slightly 8-ribbed when mature, exostome of 16 erect teeth, coarsely papillose, and calyptra with abundant, spinulose, papillose hairs, some of which extend over the beak. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Orthotrichum lescurii is sparsely distributed across eastern North America. The species is distinguished from others of Orthotrichum that occur on calcareous rock in eastern and central North America by strongly revolute leaf margins and immersed, ovate, strongly 8-ribbed, strangulate capsules. Orthotrichum anomalum has exserted capsules, O. parvulum has plane, 1-stratose margins, and O. strangulatum has multistratose leaf margins. The stomata in O. lescurii are found in the proximal half of the capsule, partially covered by subsidiary cells. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 28, p. 65. | FNA vol. 28, p. 58. |
Parent taxa | Orthotrichaceae > Orthotrichum | Orthotrichaceae > Orthotrichum |
Sibling taxa | ||
Synonyms | Dorcadion rupestre, O. bullatum, O. californicum, O. douglasii, O. macfaddenae, O. rupestre var. globosum, O. rupestre var. macfaddenae, O. texanum, O. texanum var. globosum | |
Name authority | Schleicher ex Schwagrichen: Sp. Musc. Frond. Suppl. 1(2): 27, plate 53 [top]. (1816) | Austin: Musci Appalach., 163. (1870) |
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