Orthotrichum holzingeri

Renault & Cardot

Contr. U.S. Natl. Herb. 3: 270. 1895.

EndemicIllustrated
Treatment appears in FNA Volume 28. Treatment on page 56. Mentioned on page 46, 58.

Plants to 3 cm, light green to olive green. Stem-leaves stiff, erect-appressed when dry, oblong-lanceolate to ovatelanceolate, 1.8–3 mm; margins narrowly recurved-revolute to near apex, entire; apex broadly acute to obtuse; basal laminal cells elongate to long-rectangular, walls thick, sometimes nodose; distal cells 7–12 µm, 1- stratose, smooth. Specialized asexual reproduction absent. Sexual condition gonioautoicous. Seta 2–3 mm. Capsule fully exserted, cylindric, 1.5–2.2 mm, slightly to distinctly 8-plicate to mid capsule; stomata superficial; peristome single; prostome present, large; exostome teeth 16, erect to spreading-reflexed when old and dry, smooth; endostome segments absent. Calyptra short-conic, smooth, naked. Spores 13–18 µm.


Habitat: Seasonally wet rock in small streams of dry montane forests
Elevation: moderate to high elevations (1000-2000 m)

Distribution

V28 73-distribution-map.gif

Calif., Idaho, Oreg., Wash., Wyo.

Discussion

Orthotrichum holzingeri is distinguished by the smooth laminal cells, smooth exostome, naked calyptra, and exserted, slightly ribbed capsules. The species is distinct and endemic to a relatively small region in western North America; it is most closely related to O. laevigatum.

Selected References

None.

Lower Taxa

None.
... more about "Orthotrichum holzingeri"
awned +  and apiculate +
broadly acute;obtuse +
Dale H. Vitt +
Renault & Cardot +
not decurrent +
erect +  and ascending +
short-conic +
8-ribbed or 16-ribbed +  and smooth +
cylindric +
constricted +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.22 cm2.2 mm <br />0.0022 m <br />) +
differentiated +
sexual +  and asexual +
Calif. +, Idaho +, Oreg. +, Wash. +  and Wyo. +
moderate to high elevations (1000-2000 m) +
linear-lanceolate +
erect +  and spreading-reflexed +
striate +  and papillose +
rectangular;elliptic +
connate +
occasional +
Seasonally wet rock in small streams of dry montane forests +
0.18 cm1.8 mm <br />0.0018 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
oblong-lanceolate +  and ovatelanceolate +
straight +
spreading +  and widespreading +
not rugose +
linear-lanceolate +, lanceolate +, oblong +  and ovate +
denticulate +  and entire +
recurved-revolute +
dioicous +, cladautoicous +  and sexual +
rostrate;convex;conic +
mammillose +  and smooth +
2-fid +  and conic +
sometimes larger +
lateral +  and terminal +
Contr. U.S. Natl. Herb. +
sinistrorse +, dextrorse +  and erect +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Endemic +  and Illustrated +
papillose +  and smooth +
superficial +
Orthotrichum holzingeri +
Orthotrichum +
species +
specialized +
cladautoicous +, pseudautoicous +, dioicous +  and sexual +
incrassate +
light green;olive green +
large +  and small +