Ptychostomum cryophilum

(Mårtensson) J. R. Spence

Phytologia 87: 20. 2005.

Basionym: Bryum cryophilum Mårtensson Kungl. Svenska Vetenskapsakad. Avh. Naturskyddsärenden. 15(2): 183. 1956
Treatment appears in FNA Volume 28. Treatment on page 170. Mentioned on page 167, 171.

Plants in dense swelling turfs, red, red-green, or red-yellow. Stems 2–4 (–6) cm, fertile stems comose, innovations evenly foliate. Leaves yellow-green to pink or red, dark redbrown with age, somewhat distant, older leaves ± imbricate, younger leaves strongly contorted to shrunken when dry, ovate, strongly concave, 0.5–3 mm, not much enlarged toward stem apex; base green, weakly decurrent; margins plane or weakly revolute in proximal 1/4, limbidium strong, in 2 or 3 rows; apex obtuse; costa percurrent or sometimes not reaching apex, apiculus absent; proximal laminal cells rectangular, 3–4: 1; medial and distal cells irregular, 15–22 (–25) µm wide, 2–3: 1, walls thin. Specialized asexual reproduction absent. Sexual condition dioicous. Seta red, 2–4 cm, slender, straight to somewhat flexuose. Capsule yellowbrown to brown, ovate to obovate, symmetric, 2–4 mm, mouth yellowbrown; operculum conic, weakly apiculate; peristome well developed; exostome teeth yellowbrown, lamellae straight, pores absent near base along mid line; endostome not adherent to exostome, basal membrane 1/2–2/3 exostome height, segments with ovate perforations, cilia long, appendiculate. Spores 16–20 µm, pale-yellow.


Phenology: Capsules mature Jul–Aug.
Habitat: Wet soil, rock in streams, wetlands, late melting snow beds
Elevation: low to high elevations (0-2000 m)

Distribution

V28 270-distribution-map.gif

Greenland, Alta., B.C., N.W.T., Nunavut, Yukon, Alaska, Eurasia (arctic regions), Eurasia (India), Eurasia (Mongolia), Eurasia (Nepal)

Discussion

Ptychostomum cryophilum is distinguished by the densely compact red turfs, ovate concave leaves, and weak costae. The costae are red; the proximal laminal cells are narrower than the more distal cells.

Selected References

None.

Lower Taxa

None.

"narrower" is not a number."narrow" is not a number.

... more about "Ptychostomum cryophilum"
John R. Spence +
(Mårtensson) J. R. Spence +
denticulate +
reduced +
curved +  and straight +
decurrent +
Bryum cryophilum +
cucullate +
0.6 cm6 mm <br />0.006 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
yellowbrown +  and brown +
nutant +, inclined +  and suberect +
long-exserted +
ovate +  and obovate +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
not inflated +
not differentiated +
appendiculate +
sometimes not reaching apex +  and percurrent +
subpercurrent +
short-rhomboidal +
Greenland +, Alta. +, B.C. +, N.W.T. +, Nunavut +, Yukon +, Alaska +, Eurasia (arctic regions) +, Eurasia (India) +, Eurasia (Mongolia) +  and Eurasia (Nepal) +
low to high elevations (0-2000 m) +
hyaline;pale-yellow +
not adherent +
hyaline +, brown +, orange +  and yellow +
Wet soil, rock in streams, wetlands, late melting snow beds +
not +  and differentiated +
narrowly ovatelanceolate;triangular +
polyoicous +, monoicous +, dioicous +  and sexual +
imbricate;distant +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
dark redbrown +, yellow-green +  and pink or red +
younger +  and older +
erect;erect-spreading +
concave +  and ovate +
enlarged +  and shrunken +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
2-stratose +  and 1-stratose +
revolute +  and plane +
1 (?) +, 2 (?) +  and 3 (?) +
rhomboidal +  and hexagonal +
yellowbrown +
short-rectangular +  and quadrate +
lateral +  and terminal +
lateral +  and terminal +
diplolepidous-alternate +
Capsules mature Jul–Aug. +
differentiated +
smooth;papillose +
flexuose +  and straight to somewhat +
elongate +
slender +
2 cm20 mm <br />0.02 m <br /> (4 cm40 mm <br />0.04 m <br />) +
pale-yellow +
germinating +
variable +
branching +  and foliate +
4 cm40 mm <br />0.04 m <br /> (6 cm60 mm <br />0.06 m <br />) +
2 cm20 mm <br />0.02 m <br /> (4 cm40 mm <br />0.04 m <br />) +
Ptychostomum cryophilum +
Ptychostomum subg. Ptychostomum +
species +
lanceolate +
swelling +
distinct +
not +  and porose +
straight +
specialized +
dioicous +, sexual +  and asexual +
sinuate +
incrassate +
red-yellow +, red-green +  and red +
large;small to very +