Oncophorus virens

(Hedwig) Bridel

Bryol. Univ. 1: 399. 1826,.

Basionym: Dicranum virens Hedwig Sp. Musc. Frond., 142. 1801
Synonyms: Oncophorus virens var. serratus (Bruch & Schimper) Braithwaite
Treatment appears in FNA Volume 27. Treatment on page 424. Mentioned on page 423, 432.

Plants in loose tufts, green to yellowbrown. Stems 1–5 (–8) cm. Leaves folded and sometimes crisped when dry, flexuose when moist, ovatelanceolate, gradually narrowed from ovate base, sometimes coarsely serrated above, 2.5–5 mm, keeled distally, not sheathing at base, margins revolute from base to leaf middle; costa stout, mostly percurrent; laminal cells mostly 2-stratose; distal laminal cells mostly subquadrate; basal laminal cells elongate, shorter at the margins, rectangular, incrassate, alar cells enlarged and pellucid. Seta (7–) 10–20 (–22) mm. Capsule yellowbrown, slightly furrowed when dry, 1.5–2 mm. Spores 18–25 µm.


Phenology: Capsules mature late spring–early summer.
Habitat: Moist rocks, rotten logs or soil

Distribution

Greenland, Alta., B.C., Man., N.B., Nfld. and Labr. (Nfld.), N.W.T., N.S., Nunavut, Ont., Que., Sask., Yukon, Ala., Alaska, Ariz., Ark., Calif., Colo., Conn., Del., D.C., Fla., Ga., Idaho, Ill., Ind., Iowa, Kans., Ky., La., Md., Mass., Mich., Minn., Miss., Mo., Mont., Nebr., Nev., N.H., N.J., N.Mex., N.Y., N.C., N.Dak., Ohio, Okla., Oreg., Pa., R.I., S.C., S.Dak., Tenn., Tex., Utah, Vt., Va., Wash., W.Va., Wis., Wyo., Europe, Asia

Discussion

A form of Oncophorus virens with coarsely toothed distal margins, was once treated as var. serratus and is often found on rocks in or near streams. The North American material examined (as noted also by A. J. Grout 1928–1940, vol. 2) varies considerably in the shape of the leaf base, the extent of the revolute leaf margins, and the presence or absence of alar cells in young plants.

Selected References

None.

Lower Taxa

None.
... more about "Oncophorus virens"
persistent +  and deciduous +
Steven G. Newmaster +
(Hedwig) Bridel +
short to long +
Dicranum virens +
microphyllous +
pseudomonoicous +, dioicous +, autoicous +  and sexual +
reproduction +  and asexual +
cucullate +
inclined +  and horizontal +
cylindric +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
papillose +  and mammillose +
autoicous +  and sexual +
enlarged +
differentiated +
Greenland +, Alta. +, B.C. +, Man. +, N.B. +, Nfld. and Labr. (Nfld.) +, N.W.T. +, N.S. +, Nunavut +, Ont. +, Que. +, Sask. +, Yukon +, Ala. +, Alaska +, Ariz. +, Ark. +, Calif. +, Colo. +, Conn. +, Del. +, D.C. +, Fla. +, Ga. +, Idaho +, Ill. +, Ind. +, Iowa +, Kans. +, Ky. +, La. +, Md. +, Mass. +, Mich. +, Minn. +, Miss. +, Mo. +, Mont. +, Nebr. +, Nev. +, N.H. +, N.J. +, N.Mex. +, N.Y. +, N.C. +, N.Dak. +, Ohio +, Okla. +, Oreg. +, Pa. +, R.I. +, S.C. +, S.Dak. +, Tenn. +, Tex. +, Utah +, Vt. +, Va. +, Wash. +, W.Va. +, Wis. +, Wyo. +, Europe +  and Asia +
Moist rocks, rotten logs or soil +
not sheathing +  and folded +
falcate-secund +
flexuose +
keeled +, narrowed +, ovatelanceolate +  and crisped +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
toothed +, revolute +  and plane +
nonpitted +  and pitted +
toothed +  and forked +
red +  and pitted-striolate +
Capsules mature late spring–early summer. +
undifferentiated +
Bryol. Univ. +
2 cm20 mm <br />0.02 m <br /> (2.2 cm22 mm <br />0.022 m <br />) +
yellow;reddish yellow +
flexuose +  and straight +
cygneous +  and elongate +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
yellow +  and yellow-green +
spheric +
branching;simple +
erect-spreading +
1 cm10 mm <br />0.01 m <br /> (5 cm50 mm <br />0.05 m <br />) +
superficial +
Oncophorus virens var. serratus +
Oncophorus virens +
Oncophorus +
species +
deciduous +
divided +
smooth +  and furrowed +
strumose +
constricted +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
green +  and yellowbrown +
dull +  and glossy to somewhat +