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.

"broad" is not a number."thick" is not a number.

Acute (?) +  and Rounded (?) +
Michael D. Windham +
Windham +
swollen +
Aspidium obtusum +
simple to commonly +
2-pinnate-pinnatifid;cut +
reduced +
roundish +
Ark. +, Kans. +, Mo. +, Okla. +  and Tex. +
200–500 m +
often +  and glabrous +
Cliffs and rocky slopes (rarely terrestrial), found on a variety of substrates but mostly sandstone and granite +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
glandular +  and entire +
dissected +
monomorphic +
8cm;60cm +
2.5 cm25 mm <br />0.025 m <br /> (12 cm120 mm <br />0.12 m <br />) +
not articulate +
darker +, straw-colored +  and light-brown +
1/5 length of blade;3/4 length of blade +
Sporulating summer–fall. +
not articulate +
longer than wide +
pinnatifid +  and lobed +
Contr. Univ. Michigan Herb. +
round +, cuplike +, hoodlike +, reniform +, falcate +  and linear +
2 (?) +  and 3 (?) +
bicolored;brown +
persistent +
hairlike;lanceolate +
not spiny;entire;dentate +
filamentous +
discrete +
cristate +
dictyostelic +, unbranched +  and branched +
erect +  and horizontal +
Woodsia perriniana +
Woodsia obtusa subsp. occidentalis +
Woodsia obtusa +
subspecies +
oblong +  and round +
on rock +  and terrestrial +
epiphytic +  and hemiepiphytic +
41 +, 39 +  and 38 +