Pylaisia selwynii

Kindberg

Ottawa Naturalist 2: 156. 1889.

Illustrated
Basionym: Pylaisiella selwynii (Kindberg) H. A. Crum Steere & L. E. Anderson
Synonyms: Pylaisia schimperi Cardot
Treatment appears in FNA Volume 28. Treatment on page 565. Mentioned on page 564, 566.

Plants yellowish to whitish. Stems terete-foliate to flattened, regularly and densely pinnate, branches 3 mm, ascending, strongly curved, subjulaceous; pseudoparaphyllia triangular, strongly dentate. Stem and branch leaves differentiated. Stem-leaves almost straight, broadly ovatelanceolate, suddenly narrowed to apex, not concave, not plicate, 0.9–1.2 × 0.5–0.6 mm; margins plane, sometimes slightly incurved distally; acumen short; costa double and short or indistinct; alar cells 20–25 along margins, in 6–10 rows; medial laminal cells 25–45 × 4–7 µm. Branch leaves oblong-lanceolate, smaller, narrower, 0.7–0.9 × 0.2–0.3 mm. Seta 1–1.5 cm. Capsule erect to suberect, oblong-ovoid, 1–1.6 × 0.6 mm; exothecial cell shape variable; operculum conic; peristome somewhat reduced; exostome teeth lanceolate, 0.1–0.2 mm, base 45–50 µm wide, finely papillose distally; endostome adherent to exostome teeth except distally, basal membrane developed except distally, segments 2-fid, split, internal surface roughly and finely papillose, segment and cilia connate. Spores 16–25 µm.


Phenology: Capsules mature fall.
Habitat: Tree trunks
Elevation: moderate to high elevations

Distribution

V28 882-distribution-map.gif

N.B., Nfld. and Labr. (Nfld.), N.W.T., N.S., Ont., Que., Yukon, Ala., Alaska, Ariz., Ark., Conn., Del., D.C., Fla., Ga., Ill., Ind., Iowa, Kans., Ky., Maine, Md., Mass., Mich., Minn., Mo., N.H., N.J., N.Y., N.C., N.Dak., Ohio, Okla., Pa., Vt., Va., W.Va., Wis., Mexico, Asia (sw China), Asia (Japan), Asia (Russia)

Discussion

Pylaisia selwynii is the most frequent and common species of the genus in the flora area; it is easily distinguished by the regularly and densely pinnate stems, broadly ovate-lanceolate stem leaves, comparatively numerous alar cells of the stem leaves, and adherent endostomes except for the distal portion. The stem leaves are secund and cordate.

Selected References

None.

Lower Taxa

None.
... more about "Pylaisia selwynii"
not +  and differentiated +
subulate;acuminate +
Tomotsugu Arikawa +
Kindberg +
papillose +
decurrent +
45um +  and 50um +
Pylaisiella selwynii +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.09 cm0.9 mm <br />9.0e-4 m <br />) +
autoicous +, sexual +  and asexual +
oblong-lanceolate +
0.2mm +  and 0.3mm +
3 cm30 mm <br />0.03 m <br /> (?) +
cucullate +
0.1 cm1 mm <br />0.001 m <br /> (0.16 cm1.6 mm <br />0.0016 m <br />) +
erect +  and suberect +
oblong-ovoid +
constricted +
0.6 cm6 mm <br />0.006 m <br /> (?) +
similar +  and pigmented +
20 +  and 25 +
subquadrate;rectangular +
enlarged +
differentiated +
rudimentary +
N.B. +, Nfld. and Labr. (Nfld.) +, N.W.T. +, N.S. +, Ont. +, Que. +, Yukon +, Ala. +, Alaska +, Ariz. +, Ark. +, Conn. +, Del. +, D.C. +, Fla. +, Ga. +, Ill. +, Ind. +, Iowa +, Kans. +, Ky. +, Maine +, Md. +, Mass. +, Mich. +, Minn. +, Mo. +, N.H. +, N.J. +, N.Y. +, N.C. +, N.Dak. +, Ohio +, Okla. +, Pa. +, Vt. +, Va. +, W.Va. +, Wis. +, Mexico +, Asia (sw China) +, Asia (Japan) +  and Asia (Russia) +
moderate to high elevations +
filamentous +
Tree trunks +
dioicous +, autoicous +  and sexual +
hygroscopic +  and perfect +
Capsules mature fall. +
Ottawa Naturalist +
papillose +  and smooth +
keeled +  and 2-fid +
reddish +  and yellowish +
elongate +
1 cm10 mm <br />0.01 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
Illustrated +
spheric +
0.9mm;1.2mm +
erect-spreading +
not concave +, narrowed +  and ovatelanceolate +
0.5mm;0.6mm +
terete-foliate +
falcate-secund +
straight +
erect +, suberect +  and creeping +
flattened +
differentiated +
Pylaisia schimperi +
Pylaisia selwynii +
Pylaisia +
species +
yellowish +  and whitish +