Orthotrichum affine |
Orthotrichum pulchellum |
|
---|---|---|
orthotrichum moss, wood bristle-moss |
elegant bristle-moss, orthotrichum moss |
|
Habit | Plants to 3 cm. | Plants to 1.6 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. |
leaves crisped-flexuose when dry, narrowly lanceolate to linear-lanceolate, 1.6–3.2 mm; margins recurved to near apex, entire; apex sharply acute; basal laminal cells rectangular, walls thick, not nodose; distal cells 8–14 µm, 1-stratose, papillae 1–2 per cell, conic, small. |
Seta | 1–2.2 mm. |
(0.8–)1–3(–3.5) mm. |
Sexual condition | gonioautoicous. |
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. |
exserted or sometimes 1/2 emergent, oblong-cylindric, 0.9–2.1 mm, strongly 8-ribbed entire length; stomata immersed, in mid and distal capsule; peristome double; prostome absent; exostome teeth 16, rarely connate in 8 pairs, erect when mature, reflexed when old, irregularly papillose-reticulate; endostome segments 16, well developed, of 1 row of cells, finely roughened. |
Calyptra | conic-oblong, smooth, hairs few, papillose. |
oblong-conic to conic, smooth, naked. |
Spores | 15–18 µm. |
12–24 µm. |
Specialized | asexual reproduction absent. |
asexual reproduction absent. |
Orthotrichum affine |
Orthotrichum pulchellum |
|
Habitat | Deciduous trees, shaded rock, shaded forests near stream beds, canyons, mountains | Trunks, branches, twigs of deciduous and coniferous trees |
Elevation | low to high elevations (0-3000 m) (low to high elevations (0-9800 ft)) | low to moderate elevations (0-1000 m) (low to moderate elevations (0-3300 ft)) |
Distribution |
CA; CO; ID; MT; OR; UT; WA; AB; BC; Europe; Asia; n Africa
|
AK; CA; ID; OR; WA; BC |
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.) |
Orthotrichum pulchellum is distinguished from all species of Ulota by its glabrous calyptrae and immersed stomata, and from O. consimile by the 16 reddish exostome teeth that are papillose-reticulate with slender, high papillae, and stomata always located at or beyond mid capsule. Also, plants of O. pulchellum are rarely longer than 1 cm, and capsules are usually barely exserted and oblong-cylindric. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 28, p. 50. | FNA vol. 28, p. 63. |
Parent taxa | Orthotrichaceae > Orthotrichum | Orthotrichaceae > Orthotrichum |
Sibling taxa | ||
Synonyms | O. pulchellum var. groutii | |
Name authority | Schrader ex Bridel: Muscol. Recent. 2(2): 22. (1801) | Brunton: in J. E. Smith et al., Engl. Bot. 25: plate 1787. (1807) |
Web links |