Crossidium crassinervium var. crassinervium

Synonyms: Crossidium desertorum Holzinger & E. B. Bartram Crossidium erosum Holzinger & E. B. Bartram
Treatment appears in FNA Volume 27. Treatment on page 613.

Plants 1–5 mm. Leaves lanceolate, lingulate to lingulate-ovate, 0.5–1.3 mm, margins recurved to revolute from near apex to near base, apex obtuse, rounded or emarginate, piliferous; costa excurrent, with an abaxial epidermis, filaments 2–12 cells, cells cylindric, thin-walled, with 2–4 hollow papillae on apical cell, terminal cell cylindric or conic; cells of leaf base 7–58 µm, medial and distal cells 7–22 µm, smooth. Sexual condition dioicous or cladautoicous. Seta 6–13 mm. Capsule urn ovoid-cylindric, 0.9–2.2 mm; operculum 0.6–1 mm; peristome strongly twisted, 400–900 µm. Spores spheric, nearly smooth to conspicuously papillose, 9–15 µm.


Phenology: Capsule mature Dec–Jul.
Habitat: Soil and rocks, on banks and dry washes, under shrubs in desert areas
Elevation: moderate to high elevations (500-1700 m)

Distribution

Ariz., N.Mex., Tex., Utah, Mexico, Europe, Asia (China), Asia (India), n Africa, Atlantic Islands (Canary Islands)

Discussion

Crossidium crassinervium is characterized by the smooth-walled leaf cells and long, thin-walled filaments with cylindric to conic terminal cells. Papillae are present on the apex of the terminal cell and, occasionally, on the distal leaf cells.

Selected References

None.

Lower Taxa

None.

"broad" is not a number."um" is not declared as a valid unit of measurement for this property.

elongate +  and quadrate +
of 1-2 rows +  and differentiated +
long-excurrent +  and short-excurrent +
Piliferous (?) +, Emarginate (?) +, Rounded (?) +  and Obtuse (?) +
Claudio Delgadillo M. +
(De Notaris) Juratzka +
reniform +  and rounded +
papillose +  and smooth +
usually slightly wider +
rectangular +
rectangular;ovate +
Tortula crassinervia +
obovoid +
cucullate +
cleistocarpous +  and stegocarpous +
cylindric;ovoid-cylindric +
ovoid-cylindric +
0.09 cm0.9 mm <br />9.0e-4 m <br /> (0.22 cm2.2 mm <br />0.0022 m <br />) +
monoicous +, dioicous +  and sexual +
flat to bulging +
thin-walled +
Few (?) +  and Several (?) +
cylindric +
tomentose +  and bare +
Ariz. +, N.Mex. +, Tex. +, Utah +, Mexico +, Europe +, Asia (China) +, Asia (India) +, n Africa +  and Atlantic Islands (Canary Islands) +
moderate to high elevations (500-1700 m) +
differentiated +
2 +  and 12 +
multicellular +
Soil and rocks, on banks and dry washes, under shrubs in desert areas +
yellow +  and orange-red or red +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
concave;keeled;channeled;ovoid;lanceolate or lingulate +
1-stratose +  and twisted +
imbricate +, crowded +  and distributed +
thick-walled +  and firm-walled +
with 1-8 papillae +  and smooth +
monoicous +, dioicous +  and sexual +
lingulate +  and lingulate-ovate +
reduced +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.13 cm1.3 mm <br />0.0013 m <br />) +
cladautoicous +, dioicous +  and sexual +
inclined +  and erect +
conic;rostrate +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
photosynthetic +
2 +  and 4 +
flattened +  and 2-fid +
lateral +  and terminal +
not differentiated +
lateral +  and terminal +
red +, orange +  and yellow +
consisting of 16 mostly 2 times cleft spiculose striate or papillose lanceolate teeth , , , , +  and rudimentary +
Capsule mature Dec–Jul. +
Laubm.-Fl. Oesterr.-Ung., +
straight +
elongate +
0.6 cm6 mm <br />0.006 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
2 +  and 1 +
spheric +
rounded-triangular +  and rounded-pentagonal +
0.1 cm1 mm <br />0.001 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Crossidium desertorum +  and Crossidium erosum +
Crossidium crassinervium var. crassinervium +
Crossidium crassinervium +
variety +
ovoid;cylindric +
yellow distally and red +, orange +, red +  and yellow +
stemless +  and perigoniate +
occasionally smaller than the perichaetiate +