Orthotrichum lyellii |
Orthotrichum sordidum |
|
---|---|---|
Lyell's bristle-moss, Lyell's orthotrichum moss |
orthotrichum moss |
|
Habit | Plants to 13 cm. | Plants 0.5–3 cm. |
Stem | leaves erect-spreading to loosely erect, ± contorted when dry, lanceolate to linear-lanceolate, 2.5–6.5 mm; margins plane, entire; apex narrowly acute to acuminate; basal laminal cells narrowly elongate, walls thick, ± nodose; distal cells 7–14 µm, 1-stratose, papillae 1–3 per cell, conic, large. |
leaves loosely erect-appressed and often slightly contorted when dry, narrowly lanceolate to oblong-lanceolate, 2–3.6 mm; margins revolute to near apex, entire; apex acute; basal laminal cells elongate-rectangular, walls thick, nodose; distal cells 7–14 µm, 1-stratose, papillae 2 or 3 per cell, conic, size moderate. |
Seta | 0.8–2.7 mm. |
0.5–1.6 mm. |
Sexual condition | dioicous. |
gonioautoicous. |
Capsule | immersed, emergent, or rarely exserted, oblong-cylindric, 1.7–3 mm, strongly 8-ribbed to mid capsule or entire length; stomata superficial; peristome double; prostome absent; exostome teeth 16, reflexed-recurved, acuminate, densely papillose; endostome segments 16, well developed, usually present when capsule is old and dry, thick, stout, of 2 rows of cells, narrower than exostome teeth, yellowish brown, coarsely papillose. |
1/2–2/3 emergent, sometimes immersed or fully exserted, oblong to oblong-cylindric, 0.8–1.5 mm, strongly 8-ribbed 1/2–2/3 length; stomata superficial; peristome double; prostome rudimentary or absent; exostome teeth 8, reflexed, reticulately papillose to obscurely papillose, deeply perforate, cancellate; endostome segments 8, well developed, usually present when capsule is old and dry, narrow, of 1 or 2 rows of cells, smooth or finely verrucose. |
Calyptra | conic-oblong, smooth, very hairy, hairs papillose. |
oblong-conic, smooth, sparsely hairy, hairs smooth or papillose. |
Spores | 18–35 µm. |
19–29 µm. |
Specialized | asexual reproduction by gemmae on leaves. |
asexual reproduction absent. |
Orthotrichum lyellii |
Orthotrichum sordidum |
|
Habitat | Trees, covering trunks to 10 m, boulders | Trunks of deciduous and coniferous trees, boulders in hardwood forests, small trees |
Elevation | low to moderate elevations (10-1000 m) (low to moderate elevations (0-3300 ft)) | low to moderate elevations (0-1000 m) (low to moderate elevations (0-3300 ft)) |
Distribution |
AK; CA; ID; OR; WA; BC; Mexico (Baja California); Europe; n Africa
|
AK; MA; ME; MI; MN; NH; NJ; NY; PA; VT; WI; MB; NB; NL; NS; NT; ON; PE; QC; n Asia |
Discussion | Orthotrichum lyellii is easily distinguished from all other species of the genus by its dioicous sexual condition, the male plants being slightly smaller and having numerous and conspicuous perigonia. In addition, the 16, slenderly acuminate, whitish exostome teeth and 16 endostome segments are characteristic. Sterile plants usually have abundant laminal gemmae. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Orthotrichum sordidum is distinguished by its oblong capsules with exostome teeth perforate almost to the base and cancellate distally. The capsule neck is long and shriveled. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 28, p. 59. | FNA vol. 28, p. 67. |
Parent taxa | Orthotrichaceae > Orthotrichum | Orthotrichaceae > Orthotrichum |
Sibling taxa | ||
Synonyms | Dorcadion lyellii, O. lyellii var. howei, O. lyellii var. papillosum, O. lyellii var. pringlei, O. lyellii subsp. strictum, O. lyellioides, O. menziesii, O. papillosum, O. papillosum subsp. strictum, O. pringlei | O. affine var. sordidum, O. affine subsp. subrivale, O. cancellatum |
Name authority | Hooker & Taylor: Muscol. Brit., 76, plate 22 [upper left]. (1818) | Sullivant & Lesquereux: in C. F. Austin, Musci Appalach., 168. (1870) |
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