Platydictya subtilis

(Hedwig) H. A. Crum

Michigan Bot. 3: 60. 1964.

Basionym: Leskea subtilis Hedwig Sp. Musc. Frond., 221. 1801
Synonyms: Amblystegiella subtilis (Hedwig) Loeske Amblystegium subtile (Hedwig) Schimper Serpoleskea subtilis (Hedwig) Loeske
Treatment appears in FNA Volume 28. Treatment on page 284. Mentioned on page 282.

Plants dense, green to brownish. Stems with branching angle wide, branches firmly attached; pseudoparaphyllia foliose; rhizoids below or at abaxial leaf insertion, redbrown, smooth. Leaves erect-spreading, often subsecund, 0.2–0.5 mm; base somewhat narrowed to insertion; margins entire or nearly so; alar cells subquadrate, region of 6–8+ cells; distal laminal cells oblong-rhomboid, (2–) 3–5: 1. Specialized asexual reproduction absent. Sexual condition autoicous; perichaetial leaf margins entire. Seta 0.7–1.2 cm. Capsule erect or nearly so, oblong-cylindric, symmetric, 1–1.5 mm, somewhat contracted at neck and sometimes below mouth when dry, neck short; stomata in neck; annulus 1-seriate; operculum conic, obliquely short-pointed to rostellate; exostome teeth yellowbrown; endostome cilia 1 or 2, rudimentary or absent. Spores 9–13 µm.


Habitat: Bark at base of hardwoods, exposed roots, logs
Elevation: low to moderate elevations

Distribution

V28 442-distribution-map.gif

N.B., Nfld. and Labr., N.S., Ont., P.E.I., Que., Yukon, Ariz., Ark., Ind., Maine, Mass., Mich., Mo., N.H., N.J., N.Y., N.C., Okla., Vt., Va., Wis., South America, Europe, Asia

Discussion

Distinctive features of Platydictya subtilis include the entire leaf margins, elongate distal cells, and many subquadrate alar cells; the capsule is erect or nearly so. This is the only species of the genus typically found on bark.

Selected References

None.

Lower Taxa

None.

"narrower" is not a number.

... more about "Platydictya subtilis"
not +  and separating +
acuminate +
Howard A. Crum† +  and Lars Hedenäs +
(Hedwig) H. A. Crum +
not decurrent +
Leskea subtilis +
cucullate +
curved +  and straight +
nearly +  and erect +
oblong-cylindric +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
6 +  and 8 +
subquadrate +
differentiated +
appendiculate +
double +  and single +
2 (?) +  and 1 (?) +
autoicous +, sexual +  and asexual +
N.B. +, Nfld. and Labr. +, N.S. +, Ont. +, P.E.I. +, Que. +, Yukon +, Ariz. +, Ark. +, Ind. +, Maine +, Mass. +, Mich. +, Mo. +, N.H. +, N.J. +, N.Y. +, N.C. +, Okla. +, Vt. +, Va. +, Wis. +, South America +, Europe +  and Asia +
low to moderate elevations +
brownish +  and yellowbrown +
short +  and narrow +
Bark at base of hardwoods, exposed roots, logs +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (?) +  and 0.03 cm0.3 mm <br />3.0e-4 m <br /> (?) +
erect-appressed +  and loosely spreading +
lanceolate +
erect-spreading +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (?) +  and 0.05 cm0.5 mm <br />5.0e-4 m <br /> (?) +
nearly +  and entire +
dioicous +, autoicous +  and sexual +
multistratose +  and 1-stratose +
short-rhomboidal +, oblong-rhombic +  and subquadrate +
obliquely short-pointed +  and rostellate +
obovate +, oblong +, ovate +  and lanceolate +
Michigan Bot. +
inconspicuous +
granular-papillose +  and smooth +
granular-papillose +  and smooth +
0.7 cm7 mm <br />0.007 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
Amblystegiella subtilis +, Amblystegium subtile +  and Serpoleskea subtilis +
Platydictya subtilis +
Platydictya +
species +
incrassate +
green +  and brownish +
transitional +