Pellaea ternifolia subsp. arizonica

Windham

Contr. Univ. Michigan Herb. 19: 42. 1993.

Treatment appears in FNA Volume 2.

Petiole rounded or slightly flattened adaxially in distal portion; rachis glabrous or with a few widely scattered hairs; pinnae completely glabrous; largest ultimate segments (excluding terminal pinnae) usually more than 18 mm; spores averaging 46–53 µm diam. 2n = 116.


Phenology: Sporulating summer–fall.
Habitat: Cliffs and rocky slopes, on a variety of acidic substrates including quartzite and granite
Elevation: 1700–2400 m

Discussion

Pellaea ternifolia subsp. arizonica and P. wrightiana hybridize; the hybrids are morphologically intermediate tetraploids and have malformed spores.

Selected References

None.

Lower Taxa

None.
Michael D. Windham +
Windham +
Pteris ternifolia +
Ariz. +, Tex. +  and n Mexico. +
1700–2400 m +
Cliffs and rocky slopes, on a variety of acidic substrates including quartzite and granite +
Sporulating summer–fall. +
Contr. Univ. Michigan Herb. +
Pellaea ternifolia subsp. arizonica +
Pellaea ternifolia +
subspecies +