Orthotrichum speciosum

Nees in J. Sturm et al.
in J. Sturm et al., Deutschl. Fl. 2 (17): 5. 1819.
Synonyms: Orthotrichum killiasii Müller Hal. O. speciosum subsp. killiasii (Müller Hal.) Kindberg O. speciosum var. killiasii (Müller Hal.) Venturi
Treatment appears in FNA Volume 28. Treatment on page 67. Mentioned on page 47, 54, 70.

Plants 0.8–5 cm. Stem leaves loosely erect, usually slightly contorted or curved when dry, lanceolate to narrowly lanceolate, 3–4 mm; margins revolute nearly to apex, entire; apex acuminate to narrowly acute; basal laminal cells elongate, walls thick, nodose or wavy; distal cells 7–13 µm, 1-stratose, papillae 1–3 per cell, conic or 2-fid, large. Specialized asexual reproduction absent. Sexual condition gonioautoicous. Seta 1–3 mm. Capsule exserted to rarely emergent, cylindric to ovate-cylindric when mature, 1.5–2.4 mm, slightly 8-ribbed to mid capsule; stomata superficial; peristome double; prostome absent; exostome teeth 8, separate to base, recurved, acute, coarsely papillose; endostome segments 8, 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. Calyptra conic-oblong, smooth, hairy, hairs finely papillose. Spores 13–26 µm.

Habitat: Coniferous and deciduous trees, rock
Elevation: low to high elevations (10-2000 m)


V28 99-distribution-map.gif

Greenland, Alta., B.C., Man., N.B., Nfld. and Labr., N.W.T., N.S., Nunavut, P.E.I., Que., Sask., Yukon, Alaska, Calif., Colo., Idaho, Mich., Minn., Mont., Nev., N.H., N.Y., Oreg., Utah, Wash., Wyo., Europe, n Asia, n Africa.


Orthotrichum speciosum is primarily western and Arctic in distribution; the plants are distinguished by their ribbed capsules, large size, and more slender leaf apices.

Selected References


Lower Taxa


... more about "Orthotrichum speciosum"
Dale H. Vitt +
Nees in J. Sturm et al. +
Greenland +, Alta. +, B.C. +, Man. +, N.B. +, Nfld. and Labr. +, N.W.T. +, N.S. +, Nunavut +, P.E.I. +, Que. +, Sask. +, Yukon +, Alaska +, Calif. +, Colo. +, Idaho +, Mich. +, Minn. +, Mont. +, Nev. +, N.H. +, N.Y. +, Oreg. +, Utah +, Wash. +, Wyo. +, Europe +, n Asia +  and n Africa. +
low to high elevations (10-2000 m) +
Coniferous and deciduous trees, rock +
in J. Sturm et al., Deutschl. Fl. +
Illustrated +
Orthotrichum killiasii +, O. speciosum subsp. killiasii +  and O. speciosum var. killiasii +
Orthotrichum speciosum +
Orthotrichum +
species +