Pterygoneurum ovatum
Pterygoneurum kozlovii
ovate pterygoneurum moss
alkaline wing-nerve moss, kozlov's pterygoneurum moss
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.
with distal lamina smooth;
awn smooth or sharply serrulate;
lamellae 2–6(–10) cells in height, not lobed, sometimes bearing filaments.
stegocarpous, emergent to exerted, ovoid, annulus present, operculum cells in straight rows; eperistomate.
cleistocarpous, immersed to emergent, short-ovoid; eperistomate.
cucullate or rarely mitrate.
cucullate or rarely mitrate.
Pterygoneurum ovatum
Pterygoneurum kozlovii
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.)
A locally abundant (T. T. McIntosh 1989) western species, Pterygoneurum kozlovii commonly grows mixed with other species of the genus. Although the gametophyte is much the same as that of P. subsessile, the brown, spheric cleistocarpous capsules with no annulus are unique for the genus. Perigonia are borne terminally on short lateral or basal branches.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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