Orthotrichum pycnophyllum

Schimper in J. K. A. Müller

in J. K. A. Müller, Syn. Musc. Frond. 1: 709. 1849.

Synonyms: Orthotrichum lozanoi Cardot O. lozanoi var. lutescens Cardot O. pycnophyllum var. lutescens (Cardot) Grout O. recurvans
Treatment appears in FNA Volume 28. Treatment on page 64. Mentioned on page 47, 70.

Plants 0.8–4 cm. Stem-leaves loosely erect-spreading when dry, lanceolate, 2.5–4 mm; margins revolute to just below apex, often wavy and slightly notched near apex; apex gradually acuminate to long acuminate-cuspidate; basal laminal cells elongate, walls thick, nodose; distal cells 7–13 µm, 1-stratose, papillae 1 or 2 per cell, conic, size moderate. Specialized asexual reproduction absent. Sexual condition gonioautoicous. Seta 1–1.5 mm. Capsule immersed to fully exserted, usually 1/2–1/4 emergent, oblong-ovate to cylindric, 1.5–2 mm, smooth to slightly 8-ribbed; stomata superficial; peristome double; prostome absent; exostome teeth 16, separate to base, recurved, acute, obscurely and densely papillose; endostome segments 16, separate to base, well developed, thick, stout, of 2 rows of cells, narrower than exostome teeth, usually not erose, yellowish-brown, coarsely papillose. Calyptra conic-oblong, smooth, moderately hairy, hairs smooth. Spores 17–29 µm.


Habitat: Branches and trunks of trees
Elevation: moderate to high elevations (500-2000 m)

Distribution

V28 92-distribution-map.gif

Ariz., N.Mex., Tex., Mexico, Central America (Guatemala), Central America (Panama), South America

Discussion

Distinguishing features of Orthotrichum pycnophyllum are the 16 exostome teeth that are not connate at the base to form a membrane as in O. keeverae, 16 endostome segments, and a slightly ribbed capsule that is usually 3/4 emergent.

Selected References

None.

Lower Taxa

None.

"narrower" is not a number.

... more about "Orthotrichum pycnophyllum"
awned +  and apiculate +
gradually acuminate;long acuminate-cuspidate +
Dale H. Vitt +
Schimper in J. K. A. Müller +
not decurrent +
erect +  and ascending +
conic-oblong +
smooth +  and slightly 8-ribbed +
8-ribbed or 16-ribbed +  and smooth +
1/2 +  and 1/4 +
oblong-ovate;cylindric +
constricted +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
differentiated +
Ariz. +, N.Mex. +, Tex. +, Mexico +, Central America (Guatemala) +, Central America (Panama) +  and South America +
moderate to high elevations (500-2000 m) +
linear-lanceolate +
rectangular;elliptic +
connate +
occasional +
Branches and trunks of trees +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
erect-spreading +
lanceolate +
straight +
spreading +  and widespreading +
not rugose +
linear-lanceolate +, lanceolate +, oblong +  and ovate +
notched +  and wavy +
dioicous +, cladautoicous +  and sexual +
rostrate;convex;conic +
mammillose +  and smooth +
sexual +  and asexual +
moderate +
sometimes larger +
lateral +  and terminal +
in J. K. A. Müller, Syn. Musc. Frond. +
sinistrorse +, dextrorse +  and erect +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
papillose +  and smooth +
superficial +
Orthotrichum lozanoi +, O. lozanoi var. lutescens +, O. pycnophyllum var. lutescens +  and O. recurvans +
Orthotrichum pycnophyllum +
Orthotrichum +
species +
specialized +
cladautoicous +, pseudautoicous +, dioicous +  and sexual +
incrassate +
olive brown;reddish-brown;olive brown;reddish-brown;dark green +
large +  and small +