Pterygoneurum ovatum

(Hedwig) Dixon

Rev. Bryol. Lichénol. 6: 96. 1934,.

Basionym: Gymnostomum ovatum Hedwig Sp. Musc. Frond., 31, plate 2, figs. 1–3. 1801
Treatment appears in FNA Volume 27. Treatment on page 608. Mentioned on page 607, 609.

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.


Phenology: Spores mature spring.
Habitat: Soil (volcanic, dry saline), frost boil, low desert scrub areas
Elevation: moderate elevations (900-1600 m)

Distribution

V27 878-distribution-map.gif

Alta., B.C., Man., N.W.T., Nunavut, Ont., Que., Sask., Yukon, Alaska, Ariz., Calif., Colo., Idaho, Kans., Mont., Nebr., Nev., N.Mex., N.Dak., Oreg., S.Dak., Tex., Utah, Wash., Wyo., s South America, Europe, Asia, n Africa, Australia

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.

Selected References

None.

Lower Taxa

None.

"um" is not declared as a valid unit of measurement for this property.

... more about "Pterygoneurum ovatum"
hollow-papillose +  and smooth +
0.2 cm2 mm <br />0.002 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
of 1-2 rows +  and differentiated +
long-excurrent +  and short-excurrent +
cucullate +, obtuse +  and rounded +
Richard H. Zander +
(Hedwig) Dixon +
denticulate +
round +  and elliptic +
papillose +  and smooth +
usually slightly wider +
not differentiated +
Gymnostomum ovatum +
not lobed +
obovoid +
mitrate +  and cucullate +
stegocarpous +
paroicous +, autoicous +, sexual +  and asexual +
thin;weakly thickened +
brown +  and hyaline +
few +  and several +
elongate-rhomboid +  and elongate +
tomentose +  and bare +
long-excurrent +
denticulate +, entire +  and plane +
quadrate;shortly rectangular +
Alta. +, B.C. +, Man. +, N.W.T. +, Nunavut +, Ont. +, Que. +, Sask. +, Yukon +, Alaska +, Ariz. +, Calif. +, Colo. +, Idaho +, Kans. +, Mont. +, Nebr. +, Nev. +, N.Mex. +, N.Dak. +, Oreg. +, S.Dak. +, Tex. +, Utah +, Wash. +, Wyo. +, s South America +, Europe +, Asia +, n Africa +  and Australia +
moderate elevations (900-1600 m) +
differentiated +
not lobed +
multicellular +
Soil (volcanic, dry saline), frost boil, low desert scrub areas +
0 cm0 mm <br />0 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
yellow +  and orange-red or red +
8 +  and 16 +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
concave;keeled;channeled;ovoid;lanceolate or lingulate +
spathulate +  and ovate +
reduced +
dentate +  and entire +
rostrate;conic-rostrate +
photosynthetic +
hollow +, solid +  and simple +
2 +  and 3 +
flattened +  and 2-fid +
lateral +  and terminal +
lateral +  and terminal +
red +, orange +  and yellow +
Spores mature spring. +
1 (?) +, 2 (?) +  and 5 (?) +
Rev. Bryol. Lichénol. +
straight +
elongate +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
2 +  and 1 +
orange +, red +, yellow +  and laminal +
4 cm40 mm <br />0.04 m <br /> (10 cm100 mm <br />0.1 m <br />) +
rounded-triangular +  and rounded-pentagonal +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Pterygoneurum ovatum +
Pterygoneurum +
species +
sulcate +  and macrostomous +
ridged;short-cylindric +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
yellow distally and red +, orange +, red +  and yellow +
stemless +  and perigoniate +
light-brown;green +
plant +, forming a thin turf +  and gregarious +
occasionally smaller than the perichaetiate +