Dicranella cerviculata

(Hedwig) Schimper

Coroll. Bryol. Eur., 13. 1856,.

Basionyms: Dicranum cerviculatum Hedwig Sp. Musc. Frond., 149. 1801
Synonyms: Bartleya ohioensis H. Robinson Dicranella cerviculata var. americana Grout Dicranella cerviculata var. pusilla (Hedwig) Schimper Dicranella ohioensis (Hedwig) E. Britton Dicranella polaris Hedwig Dicranella pusilla Dicranum pusillum
Treatment appears in FNA Volume 27. Treatment on page 391. Mentioned on page 387.

Plants to 6 mm (or rarely, when sterile, to 30 mm), in dull, yellowbrown tufts. Leaves 2.5–3 mm, erect-spreading and flexuose or secund, linear-lanceolate, gradually subulate, slenderly acute or ± blunt; margins erect, entire or slightly serrulate near the apex; costa long-excurrent, occupying about 1/2 the leaf base; distal cells long-rectangular, 5–10: 1. Sexual condition dioicous. Seta 5–6 (–12) mm, yellow, becoming brownish with age. Capsule 0.7–1 mm, nodding and curved-asymmetric, short-oval, strumose, furrowed when dry and empty; annulus a single row of small, persistent cells; operculum slenderly long-rostrate, curved; peristome teeth 270–350 µm, divided 1/2 length distally or more. Spores 16–21 µm, smooth to indistinctly roughened.


Phenology: Capsules mature summer.
Habitat: Disturbed sand, clay, or peaty soil, often on roadbanks
Elevation: low to medium elevations

Distribution

Alta., B.C., N.B., Nfld. and Labr. (Nfld.), N.W.T., N.S., Ont., P.E.I., Que., Yukon, Alaska, Ky., Maine, Md., Mass., Mich., N.H., N.J., N.Y., Ohio, W.Va., Wis., n, c Europe, Asia (Japan), Asia (e Russia)

Discussion

The leaves of Dicranella cerviculata are not wide-spreading from a clasping base, and the perichaetial leaves are scarcely differentiated from stem leaves. The costa occupies about 1/2 of the leaf base. The nodding, asymmetric, strumose capsule becomes variously striate or furrowed when dry and empty. Bartleya ohioensis, known solely from sterile material from West Virginia and Ohio, differs from D. cerviculata only in having a somewhat better development of stereids in the costa. The report from Maryland (as B. ohioensis) was by H. Robinson and C. F. Reed (1987) and from Wisconsin by F. D. Bowers and S. K. Freckmann (1979). In Northwest Territories it is known only from Great Bear Lake and the Tuktoyaktuk Peninsula.

Selected References

None.

Lower Taxa

None.

... more about "Dicranella cerviculata"
persistent +  and deciduous +
Howard A. Crum† +
(Hedwig) Schimper +
short to long +
differentiated +
Dicranum cerviculatum +
microphyllous +
pseudomonoicous +, dioicous +, autoicous +  and sexual +
reproduction +  and asexual +
cucullate +
arcuate +  and straight +
strumose +  and short-oval +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
specialized +
persistent +
papillose +  and mammillose +
not differentiated +
long-excurrent +
subpercurrent +
papillose +  and smooth +
dioicous +  and sexual +
long-rectangular +
Alta. +, B.C. +, N.B. +, Nfld. and Labr. (Nfld.) +, N.W.T. +, N.S. +, Ont. +, P.E.I. +, Que. +, Yukon +, Alaska +, Ky. +, Maine +, Md. +, Mass. +, Mich. +, N.H. +, N.J. +, N.Y. +, Ohio +, W.Va. +, Wis. +, n +, c Europe +, Asia (Japan) +  and Asia (e Russia) +
low to medium elevations +
Disturbed sand, clay, or peaty soil, often on roadbanks +
2-stratose +  and 1-stratose +
falcate-secund +
flexuose +
blunt +, acute +, subulate +  and linear-lanceolate +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
serrulate +  and entire +
long-rostrate +
nonpitted +  and pitted +
toothed +  and forked +
short-acuminate +, concave +  and ovate +
pitted-striolate +
16 +  and single +
papillose +  and striolate +
Capsules mature summer. +
undifferentiated +
Coroll. Bryol. Eur., +
0.6 cm6 mm <br />0.006 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
brownish;yellow +
flexuose +
elongate +
0.5 cm5 mm <br />0.005 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
red +  and pitted-striolate +
papillose +
spheric +
0.5 cm5 mm <br />0.005 m <br /> (5 cm50 mm <br />0.05 m <br />) +
superficial +
furrowed +  and plicate +
Bartleya ohioensis +, Dicranella cerviculata var. americana +, Dicranella cerviculata var. pusilla +, Dicranella ohioensis +, Dicranella polaris +, Dicranella pusilla +  and Dicranum pusillum +
Dicranella cerviculata +
Dicranella +
species +
not deciduous +
lanceolate +
dioicous +, sexual +  and asexual +
yellowbrown +
reddish +, green +  and yellowish green +