Brachytheciastrum velutinum var. salicinum

(Schimper) Ochyra & Zarnowiec

Biodivers. Poland 3: 172. 2003.

Basionym: Brachythecium salicinum Renault & Cardot in P. Bruch and W. P. Schimper, Bryol. Europ. 6: 19, plate 548. 1853
Synonyms: B. suberythrorrhizon B. velutinum var. venustum (De Notaris) Archangelico
Treatment appears in FNA Volume 28. Treatment on page 413. Mentioned on page 412.

Plants green to golden brown. Stems creeping to ascending and erect in dense growth, irregularly pinnate, branches terete or rarely subcomplanate-foliate. Stem-leaves erect, densely arranged, straight, often flexuose distally, lanceolate, 1.2–1.8 × 0.3–0.5 mm; margins serrate, serrulate, or subentire; laminal cells (60–) 80–140 × 4–5 µm. Branch leaves straight. Seta slightly rough proximally and smooth near capsule, or smooth throughout.


Habitat: Rock and soil near rock outcrops, open to moderately shaded places
Elevation: low to high elevations (0-3000 m)

Distribution

V28 641-distribution-map.gif

Ariz., Calif., Colo., Idaho, Mont., N.Mex., Oreg., Tex., Utah, Wash., Wyo., Europe, w Asia, n Africa, Atlantic Islands

Discussion

The molecular phylogenetic data of A. Vanderpoorten et al. (2005) and Vanderpoorten and B. Goffinet (2006) support the species status of the Brachytheciastrum velutinum group with smooth setae. However, its acceptance at the species level makes it difficult to almost impossible to identify the majority of sterile collections. Thus, the approach of most American authors is retained here (see E. Lawton 1971; D. H. Norris and J. R. Shevock 2004) until the differences in gametophytes are found between var. salicinum and var. velutinum. Although a number of characters differentiate these two varieties, in practice their identification is not easy, and this complex obviously needs further study.

Selected References

None.

Lower Taxa

None.

"long" is not a number."thick" is not a number."broad" is not a number.

Michael S. Ignatov +
(Schimper) Ochyra & Zarnowiec +
undifferentiated +
short-rectangular +
8um +  and 10um +
short-decurrent +
rounded +  and narrowed +
rounded-cucullate +  and decurrent +
short to long +
Brachythecium salicinum +
subcomplanate-foliate +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
usually straight;curved +
cucullate +
dark redbrown +  and brown +
0 cm0 mm <br />0 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
specialized +
synoicous +, dioicous +, autoicous +, sexual +  and asexual +
subquadrate +  and short-rectangular +
differentiated +
10um +  and 15um +
3 (?) +  and 2 (?) +
discernible +
thick +  and thin +
autoicous +  and sexual +
Ariz. +, Calif. +, Colo. +, Idaho +, Mont. +, N.Mex. +, Oreg. +, Tex. +, Utah +, Wash. +, Wyo. +, Europe +, w Asia +, n Africa +  and Atlantic Islands +
yellow-green +  and orange tinge +
low to high elevations (0-3000 m) +
not adherent +
Rock and soil near rock outcrops, open to moderately shaded places +
4um (?) +  and 5um (?) +
pointed +
subentire +  and serrulate +
short-conic +
perfect +  and xerocastique +
hygrocastique +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
Biodivers. Poland +
opaque +  and clear +
delimited +
roughened +  and smooth +
0.8 cm8 mm <br />0.008 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
Illustrated +
flexuose +  and straight +
1.2mm;1.8mm +
lanceolate +
0.3mm;0.5mm +
subcomplanate-foliate +
erect +, creeping +  and ascending +
0 cm0 mm <br />0 m <br /> (4 cm40 mm <br />0.04 m <br />) +
B. suberythrorrhizon +  and B. velutinum var. venustum +
Brachytheciastrum velutinum var. salicinum +
Brachytheciastrum velutinum +
variety +
incrassate +
thick;thick +
green +  and golden brown +