Orthotrichum lyellii

Hooker & Taylor

Muscol. Brit., 76, plate 22 [upper left]. 1818.

Illustrated
Synonyms: Dorcadion lyellii (Hooker & Taylor) Lindberg Orthotrichum lyellii var. howei Renault & Cardot O. lyellii var. papillosum (Hampe) Lesquereux & James O. lyellii var. pringlei (Müller Hal.) Macoun & Kindberg O. lyellii subsp. strictum Venturi O. lyellioides O. menziesii O. papillosum O. papillosum subsp. strictum (Venturi) Kindberg O. pringlei
Treatment appears in FNA Volume 28. Treatment on page 59. Mentioned on page 45, 46, 47, 70.

Plants to 13 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. Specialized asexual reproduction by gemmae on leaves. Sexual condition dioicous. Seta 0.8–2.7 mm. 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 old and dry, thick, stout, of 2 rows of cells, narrower than exostome teeth, yellowish-brown, coarsely papillose. Calyptra conic-oblong, smooth, very hairy, hairs papillose. Spores 18–35 µm.


Habitat: Trees, covering trunks to 10 m, boulders
Elevation: low to moderate elevations (10-1000 m)

Distribution

V28 78-distribution-map.gif

B.C., Alaska, Calif., Idaho, Oreg., Wash., Mexico (Baja California), Europe, n Africa

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.

Selected References

None.

Lower Taxa

None.

"-ribbed" is not declared as a valid unit of measurement for this property."narrower" is not a number.

... more about "Orthotrichum lyellii"
awned +  and apiculate +
narrowly acute;acuminate +
Dale H. Vitt +
Hooker & Taylor +
not decurrent +
erect +  and ascending +
conic-oblong +
8-ribbed or 16-ribbed +  and smooth +
oblong-cylindric +
constricted +
0.17 cm1.7 mm <br />0.0017 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
differentiated +
B.C. +, Alaska +, Calif. +, Idaho +, Oreg. +, Wash. +, Mexico (Baja California) +, Europe +  and n Africa +
low to moderate elevations (10-1000 m) +
linear-lanceolate +
reflexed-recurved +
rectangular;elliptic +
connate +
occasional +
Trees, covering trunks to 10 m, boulders +
papillose +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.65 cm6.5 mm <br />0.0065 m <br />) +
erect-spreading +  and loosely erect +
lanceolate +  and linear-lanceolate +
straight +
spreading +  and widespreading +
not rugose +
linear-lanceolate +, lanceolate +, oblong +  and ovate +
dioicous +, cladautoicous +  and sexual +
rostrate;convex;conic +
mammillose +  and smooth +
dioicous +  and sexual +
sometimes larger +
lateral +  and terminal +
Muscol. Brit., +
sinistrorse +, dextrorse +  and erect +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.27 cm2.7 mm <br />0.0027 m <br />) +
Illustrated +
papillose +  and smooth +
superficial +
Dorcadion lyellii +, Orthotrichum 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 +  and O. pringlei +
Orthotrichum lyellii +
Orthotrichum +
species +
specialized +
cladautoicous +, pseudautoicous +, dioicous +  and sexual +
incrassate +
olive brown;reddish-brown;olive brown;reddish-brown;dark green +
large +  and small +