Pseudocrossidium crinitum

(Schultz) R. H. Zander

Bull. Buffalo Soc. Nat. Sci. 32: 119. 1993,.

Basionym: Barbula crinita Schultz Nova Acta Phys.-Med. Acad. Caes. Leop.-Carol. Nat. Cur. 11: 226. 1823
Synonyms: Barbula aurea (E. B. Bartram) R. H. Zander Pseudocrossidium aureum (E. B. Bartram) R. H. Zander Tortula aurea E. B. Bartram
Treatment appears in FNA Volume 27. Treatment on page 570. Mentioned on page 555.

Stems to 1.5 cm. Stem-leaves ovate to short-lanceolate, 1.5–1.9 mm including the awn, distal margins strongly recurved to once revolute; apex rounded-obtuse below the awn; costa ending in a short awn, adaxial surface of costa at mid leaf concave, with 4 guide cells; distal laminal cells 12–15 µm wide, 1: 1. Specialized asexual reproduction absent. [Perichaetial leaves not differentiated.] Sporophytes not seen.


Habitat: Soil, sand, sandstone, limestone, basalt, shale, boulders, ledges, deserts
Elevation: moderate to high elevations (500-2000 m)

Distribution

V27 818-distribution-map.gif

Ariz., Nev., N.Mex., Tex., Utah, Mexico, South America, Africa, Australia

Discussion

Pseudocrossidium crinitum, when the awn is short, can be distinguished from P. replicatum (forms of which may have strongly mucronate leaf apices) by the large area of differentiated parenchymatous cells on the abaxial lateral surface of the costa on both sides adjacent to the laminal insertion on the costa, easily seen in section at mid leaf and often deep yellow in color, appearing as a row of ocelli; the leaf marginal cells are very thin-walled. This essentially southern species reaches its northern range extension in western United States E. B. Bartram 1924; R. H. Zander 1993). An exceptionally robust collection of P. crinitum from Mexico (Puebla, Azumbilla, Zander 4899, BUF) has two layers of guide cells in the costa, but this is very unusual.

Selected References

None.

Lower Taxa

None.
... more about "Pseudocrossidium crinitum"
quadrate +  and shortly rectangular +
of 1-2 rows +  and differentiated +
long-excurrent +  and short-excurrent +
Richard H. Zander +
(Schultz) R. H. Zander +
reniform +  and rounded +
papillose +  and smooth +
usually slightly wider +
oblong;differentiated +
Barbula crinita +
obovoid +
cucullate +
stegocarpous +
dioicous +  and sexual +
weakly convex +  and bulging +
vesiculose +, thin-walled +  and walled +
hollow-papillose +
elongate-rhomboid +  and elongate +
thicker +
tomentose +  and bare +
swollen +
denticulate +  and entire +
subquadrate;subquadrate +
Ariz. +, Nev. +, N.Mex. +, Tex. +, Utah +, Mexico +, South America +, Africa +  and Australia +
moderate to high elevations (500-2000 m) +
differentiated +
multicellular +
Soil, sand, sandstone, limestone, basalt, shale, boulders, ledges, deserts +
awned +  and convolute-sheathing +
yellow +  and orange-red or red +
1 +  and 2 +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.19 cm1.9 mm <br />0.0019 m <br />) +
ovate;short-lanceolate +
usually broadly lanceolate +  and narrowly elliptical +
reduced +
dentate +  and entire +
conic-rostrate;long-conic +
photosynthetic +
photosynthetic +
multiplex +, 2-fid +  and plate-like +
lateral +  and terminal +
lateral +  and terminal +
red +, orange +  and yellow +
consisting of 16 mostly 2 times cleft spiculose striate or papillose lanceolate teeth , , , , +  and rudimentary +
1 (?) +, 2 (?) +  and 6 (?) +
Bull. Buffalo Soc. Nat. Sci. +
straight +
elongate +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
2 +  and 1 +
red blotches +, yellow +  and orange +
rounded-triangular +  and rounded-pentagonal +
0 cm0 mm <br />0 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
Barbula aurea +, Pseudocrossidium aureum +  and Tortula aurea +
Pseudocrossidium crinitum +
Pseudocrossidium +
species +
elliptic;cylindric +
0.16 cm1.6 mm <br />0.0016 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
orange +  and hyaline +
thin +  and evenly thickened +
stemless +  and perigoniate +
yellowish green;brown distally +
occasionally smaller than the perichaetiate +