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)


V27 818-distribution-map.gif

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


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


Lower Taxa

... more about "Pseudocrossidium crinitum"
Richard H. Zander +
(Schultz) R. H. Zander +
Barbula crinita +
Ariz. +, Nev. +, N.Mex. +, Tex. +, Utah +, Mexico +, South America +, Africa +  and Australia. +
moderate to high elevations (500-2000 m) +
Soil, sand, sandstone, limestone, basalt, shale, boulders, ledges, deserts +
Bull. Buffalo Soc. Nat. Sci. +
Barbula aurea +, Pseudocrossidium aureum +  and Tortula aurea +
Pseudocrossidium crinitum +
Pseudocrossidium +
species +