Crossidium squamiferum var. pottioideum
Laubm. Eur., 315. 1927,.
Basionym: Tortula squamifera var. pottioidea De Notaris Musci Ital., 22. 1862
Synonyms: Crossidium griseum
Leaves with margins recurved to erect and whitish distally, undifferentiated proximally. Seta 5–8 mm. Capsule urn short-cylindric, 1–2.1 mm; operculum 0.6–1.1 mm; peristome short, nearly straight, cribrose, 198–520 µm.
Phenology: Capsule mature May–Aug(-Dec).
Habitat: Banks, sandy soil or rocks along dry washes
Elevation: 1000-1500 m
Distribution
Ariz., Calif., Colo., Nev., Utah, Mexico (Baja California), Europe, Asia, n Africa, Atlantic Islands (Canary Islands)
Discussion
M. J. Cano et al. (1993) did not recognize var. pottioideum as a distinct taxon. However, the character states given in the key offer good reasons to retain it, despite some intergradation with var. squamiferum.
Selected References
None.
Lower Taxa
None.
"broad" is not a number."um" is not declared as a valid unit of measurement for this property.
... more about "Crossidium squamiferum var. pottioideum"
inconspicuous +
differentiated +
revoluble +
deciduous +
serrulate +
abaxial +
differentiated +
usually slightly wider +
trabeculate +
absent +
firm-walled +
rectangular +
long +
rectangular;ovate +
obovoid +
papillose +
cucullate +
erect +
cylindric;ovoid-cylindric +
short-cylindric +
specialized +
bulging +
flat to bulging +
thickened +
vesiculose +
brownish +
absent +
excurrent +
small +
2-stratose +
stacked +
9mm;16mm +
spiculose +
filiform +
differentiated +
thin-walled +
multicellular +
absent +
common +
asexual +
whitish +
absent +
absent +
contorted +
appressed +
spreading +
concave;keeled;channeled;ovoid;lanceolate or lingulate +
whitish +
fragile +
undifferentiated +
bordered +
undifferentiated +
plane +
involute +
thick-walled +
absent +
conic;rostrate +
photosynthetic +
solid +
absent +
sheathing +
long-oval +
usually larger +
not differentiated +
straight +
twisted +
absent +
Laubm. Eur., +
straight +
oblique +
1;2 +
absent +
absent +
twisted +
elongate +
laminal +
spheric +
larger +
branching +
sheathing +
Crossidium squamiferum var. pottioideum +
Crossidium squamiferum +
variety +
thin-walled +
papillose +
ovoid;cylindric +
thin +
green;tan +
occasionally smaller than the perichaetiate +