Pseudoleskeella tectorum |
Pseudoleskeella rupestris |
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pseudoleskeella moss |
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Habit | Plants dark olive green or rarely yellow-green. | Plants green, red-green, or orange-green. |
Stem(s) | leaves ± catenulate when dry, not homomallous, ovate, abruptly narrowed to apex, concave, not plicate, 0.4–1.2 mm, 1.5–2:1; base flaring; margins plane or rarely recurved proximally, entire; apex short-acuminate, sometimes falcate; costa usually double, or single, 2-fid, or sometimes ecostate, weak, not reaching mid leaf; medial laminal cells 1–2(–3):1, walls firm, not incrassate. |
leaves not catenulate when dry, not homomallous, broadly lanceolate to ovate-lanceolate, gradually narrowed to apex, not or weakly concave, not plicate, 0.5–1.5 mm, 3:1; base not flaring or cordate; margins plane or weakly recurved, entire or weakly serrulate distally; apex short-acuminate, not falcate; costa usually single, rarely 2-fid near tip, strong, to mid leaf or into acumen, somewhat flared in acumen; medial laminal cells 2–3:1, walls incrassate. |
Branch leaves | ovate to suborbicular, 0.4–0.8 mm; laminal cell walls moderately incrassate. |
ovate-lanceolate, 0.5–1.2 mm; laminal cell walls thin. |
Seta | red-brown, 0.1–0.2 cm. |
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Capsule | inclined, subcylindric, asymmetric, 1.5–2.5(–3) mm. |
erect, cylindric, symmetric, 2–3 mm. |
Spores | 10–18 µm. |
8–12 µm]. |
Stoloniferous | leaves broadly ovate or suborbicular. |
leaves broadly ovate-lanceolate to ovate. |
[seta brown or red-brown, 0.1–0.3 cm. | ||
Pseudoleskeella tectorum |
Pseudoleskeella rupestris |
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Phenology | Capsules mature summer. | Capsule maturity unknown. |
Habitat | Shaded calcareous rock, shaded tree bases or wood | Dry shaded calcareous rock |
Elevation | low to high elevations (0-4000 m) (low to high elevations (0-13100 ft)) | low to high elevations (0-3000 m) (low to high elevations (0-9800 ft)) |
Distribution |
AK; AZ; CA; CO; ID; KS; MI; MN; MT; ND; NE; NM; NV; OR; SD; UT; WY; AB; BC; NL; NT; NU; ON; QC; SK; Greenland; Eurasia
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AK; CO; ID; MN; MT; UT; WY; AB; BC; MB; NL; NU; ON; Greenland; w Europe; n Europe |
Discussion | Pseudoleskeella tectorum is distinguished by the dark green, tightly appressed, catenulate leaves, and weak costa. Thin mats of this species can be become quite extensive over time, covering the faces and overhangs of shaded boulders and cliffs. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Pseudoleskeella rupestris is similar to Leskeella nervosa, and should probably be included in that genus. According to W. A. Weber and R. C. Wittmann (2007), plants of P. rupestris from Colorado bear clustered flagelliform branchlets in axils of distal secondary branch leaves, a characteristic trait of L. nervosa. The leaves are irregularly twisted when dry. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 28, p. 365. | FNA vol. 28, p. 363. |
Parent taxa | Leskeaceae > Pseudoleskeella | Leskeaceae > Pseudoleskeella |
Sibling taxa | ||
Synonyms | Hypnum tectorum, Pseudoleskea tectorum | Leskea rupestris, Leskeella nervosa var. sibirica, P. sibirica |
Name authority | (Funck ex Bridel) Kindberg ex Brotherus: in H. G. A. Engler and K. Prantl, Nat. Pflanze n fam. 229[I,3]: 997. (1907) | (Berggren) Hedenas & L. Soderström: Lindbergia 17: 64. (1992) |
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