Dicranella palustris

(Dickson) E. F. Warburg

Trans. Brit. Bryol. Soc. 4(2): 247. 1962,.

Basionyms: Bryum palustre Dickson Fasc. Pl. Crypt. Brit. 4: 11. 1801
Synonyms: Dicranella squarrosa (Schrader) Schimper
Treatment appears in FNA Volume 27. Treatment on page 388. Mentioned on page 383, 387, 389.

Plants relatively robust, 2–11 cm, in loose, light-green or yellow, ± shiny tufts. Leaves not crowded, 2.5–3 mm, abruptly narrowed to a narrow, squarrose limb from an erect, oblong or obovate base, subtubulose and generally ± twisted-crispate when dry, concave when moist, often cucullate at a rounded though often narrow apex, decurrent at base; margins erect, irregularly crenate at the extreme tip; costa subpercurrent, smooth abaxially; distal cells elongate, 4–9: 1, the basal-cells longer, yellow at the insertion, often ± differentiated at extreme basal angles. Sexual condition dioicous. Seta 10–30 mm, dark red. Capsule 1–1.5 mm, curved-inclined, smooth; annulus present or absent; operculum stoutly conic-rostrate; peristome teeth ca. 500–650 µm, divided about 1/2 way distally, vertically papillose-striolate. Spores 16–25 µm, smooth or papillose.


Phenology: Capsules mature spring.
Habitat: Wet soil in springy places, often at roadsides, sometimes temporarily submerged, probably an acidophile
Elevation: low to medium elevations

Distribution

Greenland, Alta., B.C., N.B., Nfld. and Labr. (Nfld.), N.S., Que., Yukon, Alaska, Calif., Maine, Mont., N.H., Ohio, Oreg., Wash., Europe, Asia (Japan), Asia (Turkey)

Discussion

Dicranella palustris is known by its squarrose-spreading, decurrent leaves ending in a narrow but rounded and crenulate tip. Lax, relatively large expressions of D. schreberiana, often given recognition as var. robusta, are smaller and have leaves with slender, acute tips, serrated margins, and broad cells. The New Hampshire and California reports were by A. J. Grout (1928–1940, vol. 1, as D. squarrosa) and D. H. Norris and J. R. Shevock (2004), respectively.

Selected References

None.

Lower Taxa

None.

... more about "Dicranella palustris"
persistent +  and deciduous +
Howard A. Crum† +
(Dickson) E. F. Warburg +
short to long +
differentiated +
dioicous +  and sexual +
obovate +  and oblong +
Bryum palustre +
microphyllous +
pseudomonoicous +, dioicous +, autoicous +  and sexual +
reproduction +  and asexual +
cucullate +
arcuate +  and straight +
curved-inclined +
subglobose +, cylindric +, oblong +  and ovoid +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
specialized +
persistent +  and deciduous +
papillose +  and mammillose +
not differentiated +
subpercurrent +
papillose +  and smooth +
Greenland +, Alta. +, B.C. +, N.B. +, Nfld. and Labr. (Nfld.) +, N.S. +, Que. +, Yukon +, Alaska +, Calif. +, Maine +, Mont. +, N.H. +, Ohio +, Oreg. +, Wash. +, Europe +, Asia (Japan) +  and Asia (Turkey) +
low to medium elevations +
Wet soil in springy places, often at roadsides, sometimes temporarily submerged, probably an acidophile +
2-stratose +  and 1-stratose +
not crowded +
straight +
narrowed +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
decurrent +, cucullate +, concave +  and twisted-crispate +
entire +, serrate +  and serrulate +
conic-rostrate +
nonpitted +  and pitted +
toothed +  and forked +
short-acuminate +, concave +  and ovate +
pitted-striolate +
16 +  and single +
papillose +  and striolate +
papillose-striolate +
Capsules mature spring. +
undifferentiated +
Trans. Brit. Bryol. Soc. +
1 (?) +  and 2 (?) +
flexuose +
elongate +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 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 +
Dicranella squarrosa +
Dicranella palustris +
Dicranella +
species +
not deciduous +
lanceolate +
dioicous +, sexual +  and asexual +
yellow +  and light-green +