Cynodontium glaucescens

(Lindberg & Arnell) Paris

Actes Soc. Linn. Bordeaux, sér. 5, 6: 306. 1894,.

Basionym: Oncophorus glaucescens Lindberg & Arnell Kongl. Svenska Vetensk. Acad. Handl., n. s. 23(10): 93. 1890
Treatment appears in FNA Volume 27. Treatment on page 379. Mentioned on page 378, 380, 381.

Stems ca. 0.5 cm. Leaves 1–1.2 mm, broadly lanceolate, mostly bluntly rounded at the tips to broadly acute; leaf margins broadly recurved often to near the apex, 1-stratose; laminal cells essentially smooth, somewhat mammillose-papillose on the margins with a single mammilla per cell, more strongly mammillose-papillose at the leaf apex, with thick walls, firm, rounded at the angles, distal cells around 10 µm wide. Perigonium short-stalked. Seta to 0.7 cm, straight wet or dry. Capsule symmetrical, erect, struma small but conspicuous; annulus weakly developed, adherent.


Phenology: Capsules mature summer.
Habitat: Rock crevices, tundra hummocks, soil banks, both acid and calcareous substrates
Elevation: moderate to high elevations

Distribution

V27 536-distribution-map.gif

Greenland, Alta., Man., N.W.T., Que., Yukon, Alaska, Asia (Siberia)

Discussion

Cynodontium glaucescens is separated from C. schisti and C. alpestre by less strongly mammillose-papillose leaves, and laminal cell walls decidedly thicker. The species was reported for North America by W. C. Steere (1977, 1978) and C. D. Bird et al. (1977); a synopsis and complete list of specimens throughout its range was presented by G. S. Mogensen and Steere (1979).

Lower Taxa

None.
... more about "Cynodontium glaucescens"
reddish-brown +
persistent +  and deciduous +
large +  and small +
not deciduous +
Patricia M. Eckel +
(Lindberg & Arnell) Paris +
short to long +
rectangular +  and elongate +
Oncophorus glaucescens +
microphyllous +
pseudomonoicous +, dioicous +, autoicous +  and sexual +
reproduction +  and asexual +
cucullate +
deeply furrowed +  and sulcate +
longitudinally broadly +  and smooth +
cylindric +, ovoid +  and oblong +
differentiated +
deciduous +
papillose +  and mammillose +
differentiated +
percurrent;excurrent +
toothed +
serrulate +  and entire +
Greenland +, Alta. +, Man. +, N.W.T. +, Que. +, Yukon +, Alaska +  and Asia (Siberia) +
moderate to high elevations +
Rock crevices, tundra hummocks, soil banks, both acid and calcareous substrates +
mammillose-papillose +
falcate-secund +
rounded +  and lanceolate +
0.1 cm1 mm <br />0.001 m <br /> (0.12 cm1.2 mm <br />0.0012 m <br />) +
erect-flexuose +
acuminate +, keeled +  and tubulose +
2-stratose +  and (1-)2(-3)-stratose +
cladautoicous +, autoicous +, sexual +  and asexual +
rostrate +  and long-rostrate +
nonpitted +  and pitted +
toothed +  and forked +
0.6 cm6 mm <br />0.006 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
acute +  and rounded-obtuse +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
nearly +, 0 +  and 2/3 +
papillose +  and striolate +
Capsules mature summer. +
undifferentiated +
Actes Soc. Linn. Bordeaux, sér. +
mogensen1979a +
hyaline +  and reddish +
roughened +  and smooth +
dry +, wet +  and straight +
straight +
curved-cygneous +
0 cm0 mm <br />0 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
spheric +
0.5 cm5 mm <br />0.005 m <br /> (?) +
superficial +
conspicuous +
Cnestrum +
Cynodontium glaucescens +
Cynodontium +
species +
deciduous +
papillose +
lanceolate +
yellowish green sometimes brownish +  and dark +