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.

"thick" is not a number.

Michael D. Windham +
Windham +
cordate +, truncate +  and rounded +
Pteris ternifolia +
glabrous +  and pubescent +
pinnate-pinnatifid +, linear +  and ovate +
2.5cm;8cm +
Ariz. +, Tex. +  and n Mexico +
1700–2400 m +
yellow +  and white +
obcordate;reniform +
Cliffs and rocky slopes, on a variety of acidic substrates including quartzite and granite +
monomorphic +
clustered;widely scattered +
recurved +  and reflexed +
noncircinate +  and circinate +
10 cm100 mm <br />0.1 m <br /> (50 cm500 mm <br />0.5 m <br />) +
entire +, erose +  and dentate +
dark purple;black +
pubescent +  and glabrous +
flattened +  and rounded +
Sporulating summer–fall. +
perpendicular +
Contr. Univ. Michigan Herb. +
purple +  and black +
with a few widely scattered hairs +  and glabrous +
not decurrent +  and flattened +
persistent +
linear-subulate +
0.1mm +  and 0.3mm +
brown +  and tan +
cristate +  and tetrahedral-globose +
dark colored +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Pellaea ternifolia subsp. arizonica +
Pellaea ternifolia +
subspecies +
glabrous;sparsely villous +
1 cm10 mm <br />0.01 m <br /> (4 cm40 mm <br />0.04 m <br />) +
crescent--shaped +  and roundish +
branched +  and anastomosing +