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ovate pterygoneurum moss

Leaves

with distal lamina smooth or rarely papilose;

awn smooth or rarely with a few teeth;

lamellae 8–16 cells in height, not lobed, seldom bearing filaments.

Capsule

stegocarpous, emergent to exerted, ovoid, annulus present, operculum cells in straight rows; eperistomate.

Calyptra

cucullate or rarely mitrate.

Pterygoneurum ovatum

Phenology Spores mature spring.
Habitat Soil (volcanic, dry saline), frost boil, low desert scrub areas
Elevation moderate elevations (900-1600 m) [moderate elevations (3000-5200 ft)]
Discussion

Pterygoneurum ovatum is the most common species of the genus and serves to stabilize arid soils (S. Flowers 1973). The setae may reach 3 mm. Faint thickenings reminiscent of a rudimentary peristome can sometimes be found associated with spore sac remnants dug out of the operculum, and the laminal distal cells may by simply papillose abaxially as in P. lamellatum. R. T. Wareham (1939) found the characters of Pterygoneurum ovatum var. incanum Juratzka, the long awns and short setae, inconstant in both American and European material.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Distribution
from FNA
AK; AZ; CA; CO; ID; KS; MT; ND; NE; NM; NV; OR; SD; TX; UT; WA; WY; AB; BC; MB; NT; NU; ON; QC; SK; YT; s South America; Europe; Asia; n Africa; Australia
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Parent taxa Pottiaceae > subfam. Pottioideae > Pterygoneurum
Sibling taxa
P. kozlovii, P. lamellatum, P. subsessile
Synonyms Gymnostomum ovatum
Name authority (Hedwig) Dixon: Rev. Bryol. Lichénol. 6: 96. (1934)
Source Flora of North America vol. 27, p. 608.
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