Cynodontium jenneri

(Schimper) Stirton

Ann. Scott. Nat. Hist. 15(58): 106. 1906,.

Basionym: Didymodon jenneri Schimper Trans. Bot. Soc. Edinburgh 9: 314, fig. 5. 1886
Synonyms: Cynodontium polycarpum var. laxirete (Schimper) Stirton
Treatment appears in FNA Volume 27. Treatment on page 379. Mentioned on page 377, 378, 382.

Stems to 5 cm. Leaves to 6 mm, narrowly lanceolate, long-acuminate to aciculose; leaf margins plane or some leaves shortly recurved at mid leaf, never to the apex, 1-stratose with patches of 2-stratose cells on one or both margins; cells of lamina essentially smooth with scattered low papilla, nearly smooth in apical region, thin-walled, often lax, angular, distal cells 12–14 (–20) µm wide. Perigonium sessile. Seta ca. 1 cm, straight wet or dry. Capsule symmetrical, erect, not strumose; annulus well developed, deciduous, of 2 rows of large, separating cells.


Phenology: Capsules mature summer.
Habitat: Shady rock, soil over rock, occasionally rotting wood
Elevation: low to moderate elevations

Distribution

V27 535-distribution-map.gif

B.C., Nfld. and Labr. (Nfld.), Yukon, Alaska, Wash., Wyo., Europe, Atlantic Islands (Faroes)

Discussion

Cynodontium jenneri is a tall, luxuriant species with long, flexuose leaves of a dilute yellow color, and pellucid areolation due to the relative scarcity of cell ornamen-tation (papillae) or distortion (mammillae). This is an oceanic species of western Europe, the Pacific Northwest, and the Avalon Peninsula of Newfoundland (H. A. Crum and L. E. Anderson 1981). See discussion under 8. C. polycarpon.

Selected References

None.

Lower Taxa

None.
... more about "Cynodontium jenneri"
reddish-brown +
large +  and small +
not deciduous +
Patricia M. Eckel +
(Schimper) Stirton +
short to long +
rectangular +  and elongate +
Didymodon jenneri +
microphyllous +
pseudomonoicous +, dioicous +, autoicous +  and sexual +
reproduction +  and asexual +
cucullate +
deeply furrowed +  and sulcate +
longitudinally broadly +  and smooth +
not strumose +
differentiated +
deciduous +
papillose +  and mammillose +
differentiated +
percurrent;excurrent +
toothed +
serrulate +  and entire +
12um (?) +  and 14um (?) +
B.C. +, Nfld. and Labr. (Nfld.) +, Yukon +, Alaska +, Wash. +, Wyo. +, Europe +  and Atlantic Islands (Faroes) +
low to moderate elevations +
Shady rock, soil over rock, occasionally rotting wood +
falcate-secund +
long-acuminate +  and lanceolate +
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 +
Ann. Scott. Nat. Hist. +
hyaline +  and reddish +
roughened +  and smooth +
dry +, wet +  and straight +
straight +
curved-cygneous +
1 cm10 mm <br />0.01 m <br /> (?) +
spheric +
0 cm0 mm <br />0 m <br /> (5 cm50 mm <br />0.05 m <br />) +
superficial +
Cynodontium polycarpum var. laxirete +
Cynodontium jenneri +
Cynodontium +
species +
deciduous +
papillose +
lanceolate +
yellowish green sometimes brownish +  and dark +