Dicranella schreberiana

(Hedwig) Hilferty ex H. A. Crum & L. E. Anderson

Mosses E. N. Amer. 1: 169. 1981,.

Basionyms: Dicranum schreberianum Hedwig Sp. Musc. Frond., 144, plate 33, figs. 6–10. 1801
Synonyms: Anisothecium grevilleanum (Bridel) Arnell & C. E. O. Jensen Anisothecium schreberianum (Hedwig) Dixon Anisothecium schreberianum var. elatum (Schimper) Wijk & Margadant Cynodontium canadense (Mitten) Lesquereux & James Dichodontium canadense (Mitten) Austin Dicranella canadense (Bridel) Schimper Dicranella grevilleana (Swartz ex Anonymous) Schimper Dicranella schreberi (Mitten) A. Jaeger Dicranella schreberi var. elata Schimper Dicranella schreberi var. grevilleana (Bridel) Mönkemeyer Dicranella schreberi var. occidentalis Austin Dicranella schreberi var. robusta Braithwaite Dicranella schreberiana var. robusta (Braithwaite) H. A. Crum & L. E. Anderson Leptotrichum canadense
Treatment appears in FNA Volume 27. Treatment on page 389. Mentioned on page 383, 387, 388.

Plants 5–20 mm (or rarely more), yellowish. Leaves to 3 mm, abruptly narrowed from an oblong to obovate, sheathing base to a flexuose-spreading or squarrose limb, blunt or acute at a slender apex, entire or ± toothed above or only at the apex; costa percurrent or shortly excurrent, often somewhat toothed abaxially above; cells rectangular, 7–15 µm wide, 2–3: 1. Sexual condition dioicous (also reportedly autoicous). Seta red, 7–12 (–25) mm. Capsule nodding, curved-asymmetric, usually somewhat strumose at base, smooth or faintly or rarely distinctly striate, 0.8–1 mm; annulus none; operculum curved-rostrate; peristome teeth 360–450 µm, forked less than 1/2 distally. Spores 13–18 µm, smooth or nearly so.


Phenology: Capsules mature fall.
Habitat: Wet soil of banks, especially roadside ditches, or in crevices of cliffs
Elevation: medium to high elevations

Distribution

Alta., B.C., Man., N.B., Nfld. and Labr. (Nfld.), N.W.T., N.S., Ont., Que., Yukon, Alaska, Calif., Colo., Idaho, Maine, Mass., Mich., Mont., N.J., N.Y., Ohio, Oreg., Pa., S.Dak., Utah, Wash., Wis., Wyo., n, c Europe, e Asia (Japan), Pacific Islands (New Zealand), Australia

Discussion

Dicranella grevilleana is scarcely distinct from D. schreberiana. In its best expression, its leaves are mostly entire, with cells only about 6 µm wide, and capsules faintly or rarely distinctly striate when dry and empty. Dicranella schreberiana, in a narrow sense, has leaves usually denticulate above, with broader cells, 8–14 µm wide, and smooth capsules. The differences, small and scarcely constant, can perhaps be related to relative environmental wetness. Dicranella schreberiana var. robusta also seems no more than an ecotype of particularly wet habitats. It is larger and has serrated leaf margins and particularly broad leaf cells. A large expression of the species greatly resembles D. palustris, which has leaves entire except for crenulations at the extreme apex. Literature reports among the states cited were: New Jersey and Oregon (E. Lawton 1971), Massachusetts (F. J. Hilferty 1960), and Utah (S. Flowers 1973).

Selected References

None.

Lower Taxa

None.

... more about "Dicranella schreberiana"
persistent +  and deciduous +
Howard A. Crum† +
(Hedwig) Hilferty ex H. A. Crum & L. E. Anderson +
short to long +
differentiated +
oblong +  and obovate +
Dicranum schreberianum +
microphyllous +
pseudomonoicous +, dioicous +, autoicous +  and sexual +
reproduction +  and asexual +
cucullate +
arcuate +  and straight +
striate +, or +  and smooth +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
specialized +
persistent +  and deciduous +
1 (?) +, 2 (?) +  and 3 (?) +
papillose +  and mammillose +
dioicous +  and sexual +
rectangular +
not differentiated +
7um +  and 15um +
excurrent;percurrent +
subpercurrent +
papillose +  and smooth +
toothed +
Alta. +, B.C. +, Man. +, N.B. +, Nfld. and Labr. (Nfld.) +, N.W.T. +, N.S. +, Ont. +, Que. +, Yukon +, Alaska +, Calif. +, Colo. +, Idaho +, Maine +, Mass. +, Mich. +, Mont. +, N.J. +, N.Y. +, Ohio +, Oreg. +, Pa. +, S.Dak. +, Utah +, Wash. +, Wis. +, Wyo. +, n +, c Europe +, e Asia (Japan) +, Pacific Islands (New Zealand) +  and Australia +
medium to high elevations +
Wet soil of banks, especially roadside ditches, or in crevices of cliffs +
2-stratose +  and 1-stratose +
falcate-secund +
straight +
toothed +, entire +, acute +, blunt +  and narrowed +
squarrose +  and flexuose-spreading +
entire +, serrate +  and serrulate +
curved-rostrate +
nonpitted +  and pitted +
toothed +  and forked +
short-acuminate +, concave +  and ovate +
pitted-striolate +
16 +  and single +
papillose +  and striolate +
Capsules mature fall. +
undifferentiated +
Mosses E. N. Amer. +
1 (?) +  and 2 (?) +
1.2 cm12 mm <br />0.012 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
flexuose +
elongate +
0.7 cm7 mm <br />0.007 m <br /> (1.2 cm12 mm <br />0.012 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 +
Anisothecium grevilleanum +, Anisothecium schreberianum +, Anisothecium schreberianum var. elatum +, Cynodontium canadense +, Dichodontium canadense +, Dicranella canadense +, Dicranella grevilleana +, Dicranella schreberi +, Dicranella schreberi var. elata +, Dicranella schreberi var. grevilleana +, Dicranella schreberi var. occidentalis +, Dicranella schreberi var. robusta +, Dicranella schreberiana var. robusta +  and Leptotrichum canadense +
Dicranella schreberiana +
Dicranella +
species +
not deciduous +
lanceolate +
dioicous +, sexual +  and asexual +