Pseudocrossidium replicatum

(Taylor) R. H. Zander

Phytologia 44: 206. 1979,.

Basionym: Barbula replicata Taylor London J. Bot. 5: 49, plate 15, fig. c. 1846
Synonyms: Barbula spiralis Müller Hal. Tortula spiralis (Müller Hal.) Mitten
Treatment appears in FNA Volume 27. Treatment on page 571. Mentioned on page 570, 632.

Stems to 1.5 cm. Stem-leaves ovate-ligulate to ovatelanceolate, 1–2 mm, distal margins usually twice-revolute; apex rounded-obtuse; costa ending in an apiculus or short mucro, rarely long-mucronate or short-awned, adaxial surface of costa at mid leaf concave, with (4–) 6 guide cells; distal laminal cells 8–10 µm wide, 1: 1. Specialized asexual reproduction absent. [Perichaetial leaves weakly differentiated, elliptical.] Sporophytes not seen.


Habitat: Soil, limy shale, boulders, lava, canyons, shady banks, bluffs
Elevation: moderate elevations (900-1600 m)

Distribution

V27 819-distribution-map.gif

Ariz., N.Mex., Tex., Mexico, South America, Africa (Kenya)

Discussion

Pseudocrossidium replicatum is distinguishable from P. crinitum by its usually apiculate apex, twice-revolute leaf margins—these enclosing thin-walled cells, and smaller distal laminal cells, these strongly bulging on both sides though this obscured by dense papillae. It is quite similar to Tortula atrovirens, the basis for an erroneous report of that species from Colorado by W. A. Weber (1973), but differs by its crescent-shaped costal section (rounded in the latter species) and thin-walled leaf marginal cells. Pseudocrossidium replicatum is characteristic of the Latin American cordillera and arid Mexico reaching north to the western United States.

Selected References

None.

Lower Taxa

None.
quadrate +  and shortly rectangular +
of 1-2 rows +  and differentiated +
long-excurrent +  and short-excurrent +
Richard H. Zander +
(Taylor) R. H. Zander +
reniform +  and rounded +
papillose +  and smooth +
usually slightly wider +
oblong;differentiated +
Barbula replicata +
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 +
short-awned +  and long-mucronate +
denticulate +  and entire +
subquadrate;subquadrate +
Ariz. +, N.Mex. +, Tex. +, Mexico +, South America +  and Africa (Kenya) +
moderate elevations (900-1600 m) +
differentiated +
multicellular +
Soil, limy shale, boulders, lava, canyons, shady banks, bluffs +
awned +  and convolute-sheathing +
yellow +  and orange-red or red +
1 +  and 2 +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
ovatelanceolate +
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 (?) +
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 spiralis +  and Tortula spiralis +
Pseudocrossidium replicatum +
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 +