Dicranoweisia crispula

(Hedwig) Milde

Bryol. Siles., 49. 1869,.

Basionym: Weissia crispula Hedwig Sp. Musc. Frond., 68. 1801
Synonyms: Dicranoweisia crispula var. compacta (Schwägrichen) Lindberg Dicranoweisia contermina Kindberg Dicranoweisia roellii Kindberg Trichostomum alpinum Schwägrichen Weissia compacta
Treatment appears in FNA Volume 27. Treatment on page 396.

Leaves crisped and curled when dry, plane in many leaves, 2-stratose in distal 1/2, cells with longitudinal striolae in distal 1/2 of leaf; usually a few alar cells enlarged on margins, often colored. Specialized asexual reproduction absent. Capsule without differentiated annulus; peristome vertically striolate basally, weakly papillose distally.


Phenology: Capsules mature spring–early summer.
Habitat: Forming cushions on siliceous rock or gravel, occasionally epiphytic or epixylic
Elevation: 10-2000 m

Distribution

Greenland, Alta., B.C., Man., N.B., Nfld. and Labr. (Nfld.), N.S., Nunavut, Ont., Que., Yukon, Alaska, Ariz., Calif., Colo., Idaho, Maine, Mich., Mont., Nev., N.H., N.Mex., N.C., Oreg., S.Dak., Tenn., Utah, Wash., Wyo., Asia

Discussion

Dicranoweisia crispula is an extremely variable species. In stature the plants vary 1–6 cm, while the leaf length varies 1–3.5 mm. The capsules vary considerably from cylindric to short-elliptic, with the length ranging 0.5–2 mm. The shape and sheathing of the perichaetial leaves is also variable. Although this species is autoicous, sex organs are often absent, especially in terrestrial plants, with sporophytes correspondingly infrequent. Differentiation of alar cells is often weak in North American material and the striolation can also be weak, and is best observed on cells adjacent to the costa. This species is widespread mainly at higher elevations in western North America, but sporadic in the eastern part of the continent, again occurring mainly at higher elevations.

Selected References

None.

Lower Taxa

None.
... more about "Dicranoweisia crispula"
elliptic;short-linear +
differentiated +
Wilfred B. Schofield +
(Hedwig) Milde +
short to long +
Weissia crispula +
straight +
microphyllous +
pseudomonoicous +, dioicous +, autoicous +  and sexual +
reproduction +  and asexual +
1/3 +  and 1/2 +
cucullate +
light +  and dark-brown +
inclined +  and erect +
smooth +  and longitudinally wrinkled +
elliptic +  and short-cylindric +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
with occasional 2-seriate portions +  and 1-seriate +
specialized +
undifferentiated +
papillose +  and mammillose +
enlarged +
percurrent;excurrent +
subpercurrent +
with longitudinal cuticular ridges +  and smooth +
autoicous +  and sexual +
subquadrate +
7um (?) +  and 10um (?) +
Greenland +, Alta. +, B.C. +, Man. +, N.B. +, Nfld. and Labr. (Nfld.) +, N.S. +, Nunavut +, Ont. +, Que. +, Yukon +, Alaska +, Ariz. +, Calif. +, Colo. +, Idaho +, Maine +, Mich. +, Mont. +, Nev. +, N.H. +, N.Mex. +, N.C. +, Oreg. +, S.Dak. +, Tenn. +, Utah +, Wash. +, Wyo. +  and Asia +
10-2000 m +
Forming cushions on siliceous rock or gravel, occasionally epiphytic or epixylic +
falcate-secund +
flexuose +
plane +, curled +  and crisped +
0.1 cm1 mm <br />0.001 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
2-stratose +  and 1-stratose +
recurved +  and incurved +
nonpitted +  and pitted +
toothed +  and forked +
broadly obtuse +  and acute or short-acuminate +
pitted-striolate +
16 +  and single +
papillose +  and striolate +
Capsules mature spring–early summer. +
undifferentiated +
Bryol. Siles., +
1 (?) +  and 3 (?) +
flexuose +  and straight +
cygneous +  and elongate +
0.3 cm3 mm <br />0.003 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
spherical +
simple or;dichotomously irregularly branched +
0.5 cm5 mm <br />0.005 m <br /> (3 cm30 mm <br />0.03 m <br />) +
superficial +
Dicranoweisia crispula var. compacta +, Dicranoweisia contermina +, Dicranoweisia roellii +, Trichostomum alpinum +  and Weissia compacta +
Dicranoweisia crispula +
Dicranoweisia +
species +
deciduous +
entire +  and divided +
light +  and dark green +