Orthotrichum sordidum

Sullivant & Lesquereux in C. F. Austin
in C. F. Austin, Musci Appalach., 168. 1870.
Illustrated
Synonyms: Orthotrichum affine var. sordidum (Sullivant & Lesquereux) Grout O. affine subsp. subrivale Kindberg O. cancellatum
Treatment appears in FNA Volume 28. Treatment on page 67. Mentioned on page 47.

Plants 0.5–3 cm. Stem 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. Specialized asexual reproduction absent. Sexual condition gonioautoicous. Seta 0.5–1.6 mm. Capsule 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 oblong-conic, smooth, sparsely hairy, hairs smooth or papillose. Spores 19–29 µm.


Habitat: Trunks of deciduous and coniferous trees, boulders in hardwood forests, small trees
Elevation: low to moderate elevations (0-1000 m)

Distribution

V28 98-distribution-map.gif

Man., N.B., Nfld. and Labr., N.W.T., N.S., Ont., P.E.I., Que., Alaska, Maine, Mass., Mich., Minn., N.H., N.J., N.Y., Pa., Vt., Wis., n Asia.

Discussion

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.

Selected References

None.

Lower Taxa

None.

... more about "Orthotrichum sordidum"
Dale H. Vitt +
Sullivant & Lesquereux in C. F. Austin +
Man. +, N.B. +, Nfld. and Labr. +, N.W.T. +, N.S. +, Ont. +, P.E.I. +, Que. +, Alaska +, Maine +, Mass. +, Mich. +, Minn. +, N.H. +, N.J. +, N.Y. +, Pa. +, Vt. +, Wis. +  and n Asia. +
low to moderate elevations (0-1000 m) +
Trunks of deciduous and coniferous trees, boulders in hardwood forests, small trees +
in C. F. Austin, Musci Appalach., +
Illustrated +
Orthotrichum affine var. sordidum +, O. affine subsp. subrivale +  and O. cancellatum +
Orthotrichum sordidum +
Orthotrichum +
species +