Woodsia obtusa subsp. occidentalis

Windham

Contr. Univ. Michigan Herb. 19: 56. 1993.

Endemic
Treatment appears in FNA Volume 2.

Stems short- to long-creeping, individual branches usually 3–5 mm diam. Blade finely cut, 2-pinnate-pinnatifid. Proximal pinnules of lower pinnae usually deeply lobed or pinnatifid. Spores averaging 35–42 µm. 2n = 76.


Phenology: Sporulating summer–fall.
Habitat: Cliffs and rocky slopes (rarely terrestrial), found on a variety of substrates but mostly sandstone and granite
Elevation: 200–500 m

Distribution

V2 307-distribution-map.gif

Ark., Kans., Mo., Okla., Tex.

Discussion

Woodsia obtusa subsp. occidentalis hybridizes with subsp. obtusa sporadically throughout the region of sympatry; the hybrids are sterile triploids with malformed spores.

Selected References

None.

Lower Taxa

None.
Michael D. Windham +
Windham +
Aspidium obtusum +
Ark. +, Kans. +, Mo. +, Okla. +  and Tex. +
200–500 m +
Cliffs and rocky slopes (rarely terrestrial), found on a variety of substrates but mostly sandstone and granite +
Sporulating summer–fall. +
Contr. Univ. Michigan Herb. +
Woodsia perriniana +
Woodsia obtusa subsp. occidentalis +
Woodsia obtusa +
subspecies +