Venturiella sinensis var. angusti-annulata

Griffin

Phytologia 57: 58. 1985,.

Treatment appears in FNA Volume 27. Treatment on page 474.

Plants irregularly branched, in dense mats. Leaves to 1.2 mm; laminal cells smooth, distal cells rhomboidal, 38–57 × 15–18 µm, proximal cells quadrate to oblate in several marginal rows. Perichaetial leaves ovate, long-acuminate. Seta short, 0.5 mm. Capsule 1.5–1.8 mm; annulus narrow, 57–69 µm wide, in 4 rows of quadrate to octagonal cells. Calyptra 0.6 mm. Spores 21–30 µm.


Habitat: Dry areas on trunks and limbs of trees
Elevation: moderate elevations

Discussion

In the flora area, Venturiella sinensis is known only from from Stone County in Arkansas, Blaine, Cherokee, Comanche, Payne, and Washita counties in Oklahoma, and Culberson County in Texas. G. J. Ikenberry et al. (1960) reported the species found on an elm tree near the campus of Oklahoma State University in Stillwater.

Venturiella sinensis is the only Erpodiaceae in North America with a well developed peristome; the other species, Wildia solmsiellacea, occurs in Australia and New Caledonia. D. G. Griffin and A. J. Sharp (1971) in a comparison of North American and Asian collections of V. sinensis recognized two varieties, based primarily on a difference in the width of the annuli (57–69 µm in North American specimens vs. 69–129 µm in Asian specimens). In addition, the annular cells of North American plants are quadrate to octagonal while in the Asian plants the distal tiers of annular cells are usually ellipsoidal to rhomboidal.

Selected References

None.

Lower Taxa

None.
57um +  and 69um +
Ronald A. Pursell +  and Bruce H. Allen +
Griffin +
Erpodium sinense +
0.6 cm6 mm <br />0.006 m <br /> (?) +
cylindrical +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.18 cm1.8 mm <br />0.0018 m <br />) +
quadrate +
papillose;smooth;more or less papillose +
cucullate +, lobed +  and mitrate +
Ark. +, Okla. +  and Tex. +
moderate elevations +
oblong;oblong-hexagonal +
Dry areas on trunks and limbs of trees +
monomorphic +
spreading +  and erect +
subulate +, ovate +  and terete +
enlarged +
apiculate +  and rostrate +
long-acuminate +  and ovate +
autoicous +, sexual +  and asexual +
acute +  and ovate +
papillose +
straight +
0.5 cm5 mm <br />0.005 m <br /> (?) +
superficial +
Venturiella sinensis var. angusti-annulata +
Venturiella sinensis +
variety +
papillose +
lanceolate +