Pylaisia polyantha

(Hedwig) Schimper in P. Bruch and W. P. Schimper

in P. Bruch and W. P. Schimper, Bryol. Europ. 5: 88. 1851.

Basionym: Leskea polyantha Hedwig Sp. Musc. Frond., 229. 1801
Synonyms: Isothecium polyanthum (Hedwig) Spruce Pterogonium polyanthos (Hedwig) Muhlenberg Pylaisia cyrtophylla Kindberg P. denticulata Schimper ex Sullivant P. filari-acuminata Müller Hal. & Kindberg P. jamesii Sullivant & Lesquereux P. ontariensis Müller Hal. & Kindberg P. polyantha var. jamesii (Sullivant & Lesquereux) Rau & Hervey P. polyantha var. subdenticulata (Schimper) Rau & Hervey P. pseudoplatygyrium Jennings P. subdenticulata (Hedwig) Grout P. suttonii (Schimper) Grout Pylaisiella polyantha (Hedwig) Mitten P. subdenticulata (Schimper) Mitten Stereodon polyanthos S. subdenticulatus
Treatment appears in FNA Volume 28. Treatment on page 564. Mentioned on page 565, 566.

Plants yellowish or whitish. Stems terete-foliate to flattened, somewhat regularly pinnate, branches 10 mm, creeping or rarely ascending and curved, subjulaceous; pseudoparaphyllia triangular, long-acuminate. Stem and branch leaves slightly differentiated. Stem-leaves nearly straight, ovatelanceolate, gradually narrowed to apex, concave, slightly plicate, 1.3–2 × 0.4–0.5 mm; margins plane, sometimes slightly involute distally; acumen long; costa double, short; alar cells 8–10 along margins, in 5–8 rows; medial laminal cells 50–80 × 4–5 µm. Branch leaves narrowly ovatelanceolate, shorter, 1.1–1.4 × 0.3–0.5 mm. Seta 1–1.8 cm. Capsule erect, oblong-cylindric, 1.6–2.2 × 0.4–0.6 mm; exothecial cells rounded-rectangular; operculum conic, obliquely short-pointed; peristome perfect, long; exostome teeth lance-subulate, 0.2 mm, base 70 µm wide, slightly papillose distally; endostome free, basal membrane well developed, segments linear-subulate, longer than exostome teeth, 0.3 mm beyond mouth, papillose distally, not perforate, never split, cilia simple. Spores 11–14 µm.


Phenology: Capsules mature fall–winter.
Habitat: Tree trunks
Elevation: low to high elevations

Distribution

V28 880-distribution-map.gif

Alta., B.C., Man., N.B., Nfld. and Labr., N.W.T., N.S., Nunavut, Ont., P.E.I., Que., Sask., Yukon, Ala., Alaska, Ariz., Colo., Conn., D.C., Ill., Iowa, Ky., Maine, Mass., Mich., Minn., Miss., Mo., Mont., Nebr., N.H., N.J., N.Mex., N.Y., N.C., N.Dak., Ohio, Pa., R.I., S.Dak., Tex., Vt., Va., Wis., Mexico (Nuevo León), Mexico (San Luis Potosí), Mexico (Veracruz), Europe, Asia (Russia)

Discussion

Pylaisia polyantha is the type species of the genus; it is the most widely distributed of the species and is remarkably variable. More than 20 varietal taxa have been described, but they are yet to be revised (T. Arikawa 2004). The capsules are somewhat widened at the base.

Selected References

None.

Lower Taxa

None.
... more about "Pylaisia polyantha"
not +  and differentiated +
subulate;acuminate +
Tomotsugu Arikawa +
(Hedwig) Schimper in P. Bruch and W. P. Schimper +
papillose +
decurrent +
Leskea polyantha +
0.11 cm1.1 mm <br />0.0011 m <br /> (0.14 cm1.4 mm <br />0.0014 m <br />) +
autoicous +, sexual +  and asexual +
ovatelanceolate +
occasionally somewhat larger +  and smaller to occasionally +
0.3mm +  and 0.5mm +
ascending +  and creeping +
10 cm100 mm <br />0.1 m <br /> (?) +
cucullate +
0.16 cm1.6 mm <br />0.0016 m <br /> (0.22 cm2.2 mm <br />0.0022 m <br />) +
oblong-cylindric +
constricted +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
similar +  and pigmented +
8 +  and 10 +
subquadrate;rectangular +
enlarged +
differentiated +
rudimentary +
Alta. +, B.C. +, Man. +, N.B. +, Nfld. and Labr. +, N.W.T. +, N.S. +, Nunavut +, Ont. +, P.E.I. +, Que. +, Sask. +, Yukon +, Ala. +, Alaska +, Ariz. +, Colo. +, Conn. +, D.C. +, Ill. +, Iowa +, Ky. +, Maine +, Mass. +, Mich. +, Minn. +, Miss. +, Mo. +, Mont. +, Nebr. +, N.H. +, N.J. +, N.Mex. +, N.Y. +, N.C. +, N.Dak. +, Ohio +, Pa. +, R.I. +, S.Dak. +, Tex. +, Vt. +, Va. +, Wis. +, Mexico (Nuevo León) +, Mexico (San Luis Potosí) +, Mexico (Veracruz) +, Europe +  and Asia (Russia) +
low to high elevations +
lance-subulate +
rounded-rectangular +
filamentous +
Tree trunks +
dioicous +, autoicous +  and sexual +
short-pointed +  and conic +
Capsules mature fall–winter. +
long-acuminate;triangular +
in P. Bruch and W. P. Schimper, Bryol. Europ. +
papillose +  and smooth +
not perforate +
papillose +
linear-subulate +
0.3 cm3 mm <br />0.003 m <br /> (?) +
reddish +  and yellowish +
elongate +
1 cm10 mm <br />0.01 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
spheric +
erect-spreading +
concave +, narrowed +  and ovatelanceolate +
0.4mm;0.5mm +
terete-foliate +
falcate-secund +
straight +
erect +, suberect +  and creeping +
flattened +
differentiated +
Isothecium polyanthum +, Pterogonium polyanthos +, Pylaisia cyrtophylla +, P. denticulata +, P. filari-acuminata +, P. jamesii +, P. ontariensis +, P. polyantha var. jamesii +, P. polyantha var. subdenticulata +, P. pseudoplatygyrium +, P. subdenticulata +, P. suttonii +, Pylaisiella polyantha +, Stereodon polyanthos +  and S. subdenticulatus +
Pylaisia polyantha +
Pylaisia +
species +
whitish +  and yellowish +