Zygodon gracilis

Wilson

Edinburgh New Philos. J., n. s. 13: 332. 1861.

Treatment appears in FNA Volume 28. Treatment on page 80. Mentioned on page 79.

Plants to 5 cm. Stem-leaves somewhat contorted and recurved when dry, widespreading to squarrose-recurved when moist, lanceolate to oblong-lanceolate, 1.4–2 mm; margins sharply serrate near apex; apex bluntly acute, apiculus absent; costa excurrent or ending obscurely in apex, abaxial surface covered by quadrate papillose cells distally; basal laminal cells elongate to short-rectangular; distal cells 4–9 µm, papillae 2–4 per cell, walls very thick. Specialized asexual reproduction gemmae absent. Sexual condition dioicous. Sporophytes unknown.


Habitat: Calcareous rock, alpine and subalpine regions
Elevation: high elevations

Distribution

V28 124-distribution-map.gif

B.C., Central America (Guatemala)

Discussion

Zygodon gracilis is distinguished from other species of the genus in North America by its squarrose-recurved leaves, absence of gemmae, bluntly acute leaf apices, and very thick-walled distal laminal cells.

Selected References

None.

Lower Taxa

None.

"entire" is not a number.

... more about "Zygodon gracilis"
Dale H. Vitt +
Wilson +
decurrent +
erect +  and ascending +
conic +  and cucullate +
long-exserted +
elliptic-oblong;fusiform +
not constricted +
papillose +
quadrate +
differentiated +
ending obscurely in apex +  and excurrent +
roundedquadrate;rounded-hexagonal +
B.C. +  and Central America (Guatemala) +
high elevations +
linear-lanceolate +
reflexed +, recurved +  and erect +
rectangular;elliptic +
connate +
specialized +
occasional +
dioicous +, sexual +, absent +  and asexual +
Calcareous rock, alpine and subalpine regions +
0.14 cm1.4 mm <br />0.0014 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
widespreading +  and squarrose-recurved +
lanceolate +  and oblong-lanceolate +
erect-spreading +  and squarrose-recurved +
not rugose +
oblong-lanceolate +  and linear-lanceolate +
denticulate +, plane to revolute +  and plane +
synoicous +, autoicous +, dioicous +  and sexual +
not differentiated +
rostrate;convex;conic +
mammillose +  and smooth +
sometimes larger +
lateral +  and terminal +
Edinburgh New Philos. J., n. s. +
sinistrorse +, dextrorse +  and erect +
0.3 cm3 mm <br />0.003 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
erect +  and ascending +
superficial +
Zygodon gracilis +
species +
specialized +
cladautoicous +, pseudautoicous +, dioicous +  and sexual +
incrassate +
olive brown;reddish-brown;olive brown;reddish-brown;dark green +