Cyrtomnium hymenophyllum

(Bruch & Schimper) Holmen

Bryologist 60: 138. 1957.

Illustrated
Basionym: Mnium hymenophyllum Bruch & Schimper Bryol. Europ. 4: 207, plate 400. 1846
Synonyms: Cinclidium hymenophyllum (Bruch & Schimper) Lindberg
Treatment appears in FNA Volume 28. Treatment on page 221. Mentioned on page 220.

Plants 2–7 (–20) cm. Stems erect, simple or branched distally; micronemata absent. Leaves not or lightly crisped when dry, 1.5–2 (–2.5) mm; base long-decurrent; apex obtuse, acute, or rarely rounded, rarely short-apiculate; costa subpercurrent or rarely percurrent; medial laminal cells (25–) 30–35 (–40) µm; marginal cells short-linear or occasionally rhomboidal, in 1 (or 2) rows. Capsule arcuate; exostome lamellae 25–40. Spores 15–25 µm.


Phenology: Capsules mature summer.
Habitat: Wet, calcareous, peaty habitats, rich fens, drainage slopes with percolating water
Elevation: low to moderate elevations

Distribution

V28 352-distribution-map.gif

Greenland, B.C., Nfld. and Labr., N.W.T., Nunavut, Que., Yukon, Alaska, Eurasia

Discussion

Cyrtomnium hymenophyllum often grows in pure stands in circumarctic and subarctic regions, in far northern North America, central west and central east Greenland, Europe, and Asia. It is readily recognized in the field by flat, bluish green leaves that are appressed against the dark brown stems. Plants growing in less optimal dry tundra are shorter and usually not matted together. The leaves are strongly heterophyllous, reflecting periods of fast and slow growth. Female plants are common throughout the range, and male plants occur more widely than those of C. hymenophylloides. Sporophytes are rare and have only been found in the Yukon (D. H. Vitt and D. G. Horton 1979), Northwest Territories, and British Columbia.

Selected References

None.

Lower Taxa

None.
... more about "Cyrtomnium hymenophyllum"
blackish +, orange-yellow +, reddish-brown +, yellowish-brown +, yellowish green +, red +, brown +  and yellow +
Rounded (?) +, Acute (?) +  and Obtuse (?) +
Norton G. Miller† +  and Gert Steen Mogensen +
(Bruch & Schimper) Holmen +
long-decurrent +
Mnium hymenophyllum +
cucullate +
strongly inclined;horizontal +
cylindric +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
undifferentiated +
2 (?) +  and 1 (?) +
nodulose +
subpercurrent +
toothed +
Greenland +, B.C. +, Nfld. and Labr. +, N.W.T. +, Nunavut +, Que. +, Yukon +, Alaska +  and Eurasia +
low to moderate elevations +
lanceolate-acuminate +
Wet, calcareous, peaty habitats, rich fens, drainage slopes with percolating water +
crowded +  and distant +
0.2 cm2 mm <br />0.002 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
reddish +, brownish +, green +  and bluish green +
crisped +
larger +  and small +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
bluish green +  and green +
dioicous +, synoicous +  and sexual +
rhomboidal +  and short-linear +
short-elongate +  and isodiametric +
rostrate +, mammillate +, apiculate +, hemispheric +  and conic +
Capsules mature summer. +
reddish-brown +  and brown +
smaller +  and larger +
straight +
elongate +
3 cm30 mm <br />0.03 m <br /> (4 cm40 mm <br />0.04 m <br />) +
Illustrated +
spheric +
branched +  and simple +
black +  and brown +
phaneroporous +
Cinclidium hymenophyllum +
Cyrtomnium hymenophyllum +
Cyrtomnium +
species +
blunt +  and sharp +
dioicous +  and sexual +