Cinclidium arcticum

(Bruch & Schimper) Schimper

Kongl. Vetensk. Acad. Handl. 1846: 143. 1848.

Basionym: Mnium arcticum Bruch & Schimper Bryol. Europ. 4: 203, plate 386. 1846
Treatment appears in FNA Volume 28. Treatment on page 218. Mentioned on page 217.

Plants 3–6 (–12) cm. Stems dark-brown. Leaves dark green, reddish-brown, or black when old, erect-spreading, ± flat, not strongly reflexed when moist, ovate, ovatelanceolate, or narrowly elliptic, rarely obovate or orbicular (in depauperate plants), 2.5–3.5 mm; base narrowly short-decurrent; margins narrowly recurved or rarely nearly plane, 1-stratose; apex acuminate or acute, short-apiculate, apiculus sharp or blunt; costa percurrent, excurrent, subpercurrent, or ending well before apex, especially in depauperate plants; medial laminal cells short-elongate or ± isodiametric, (25–) 35–60 (–80) µm, not in rows, weakly collenchymatous; marginal cells short-linear, in 2–3 (–4) rows. Sexual condition dioicous. Seta red or reddish-brown, 1.5–4 cm. Capsule light-brown, elliptic, 2–3 mm. Spores 25–70 µm.


Phenology: Capsules mature summer.
Habitat: Calciphile, fens, bogs, marshes
Elevation: low to moderate elevations

Distribution

V28 346-distribution-map.gif

Greenland, B.C., Man., N.W.T., N.S., Nunavut, Yukon, Alaska, Europe, Asia, Antarctica

Discussion

Cinclidium arcticum is distinguished by its ovate, ovate-lanceolate, or narrowly elliptic leaves with narrowly recurved margins and short-elongate or more or less isodiametric laminal cells. A few reddish brown, depauperate herbarium collections of this species with obovate leaves, subpercurrent costae, and weakly defined margins have been determined as Rhizomnium andrewsianum. However, the presence of longitudinal rows of macronemata along the stem and a stereid band in the costa showed that they are C. arcticum.

Selected References

None.

Lower Taxa

None.
... more about "Cinclidium arcticum"
blackish +, orange-yellow +, reddish-brown +, yellowish-brown +, yellowish green +, red +, brown +  and yellow +
Acute (?) +  and Acuminate (?) +
blunt +  and sharp +
Terry T. McIntosh +  and Steven G. Newmaster +
(Bruch & Schimper) Schimper +
u--shaped +
short-decurrent +
decurrent +
Mnium arcticum +
cucullate +
subglobose +, ovate-elliptic +  and elliptic +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
undifferentiated +
2 (?) +  and 1 (?) +
nodulose +
excurrent +  and percurrent +
subpercurrent +
toothed +
Greenland +, B.C. +, Man. +, N.W.T. +, N.S. +, Nunavut +, Yukon +, Alaska +, Europe +, Asia +  and Antarctica +
low to moderate elevations +
greenish yellow +
lanceolate-acuminate +
Calciphile, fens, bogs, marshes +
crowded +  and distant +
black +, reddish-brown +  and dark green +
orbicular +, obovate +, elliptic +, ovatelanceolate +  and ovate +
larger +  and small +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
reddish-brown +, brown +  and green +
dioicous +  and sexual +
rectangular +, rhomboidal +  and linear +
hemispheric +
Capsules mature summer. +
depauperate +
Kongl. Vetensk. Acad. Handl. +
smaller +  and larger +
reddish-brown +  and red +
flexuose +
elongate +
1.5 cm15 mm <br />0.015 m <br /> (4 cm40 mm <br />0.04 m <br />) +
spheric +
not dendroid +, branching +  and simple +
dark-brown +
Cinclidium arcticum +
Cinclidium +
species +
blunt +  and sharp +
collenchymatous +