Pentagramma pallida

(Weatherby) Yatskievych

Amer. Fern J. 80: 15. 1990 Pityrogramma triangularis (Kaulfuss). 1920.

Common names: P. pallida (Weatherby) K. S. Alt & V. E. Grant
Endemic
Treatment appears in FNA Volume 2.

Petiole black or nearly so, not shiny, farinose; farina white, especially in young leaves. Blade thin, herbaceous, white-farinose abaxially and adaxially, appearing grayish adaxially when fresh. 2n = 60.


Habitat: Rock crevices and at base of boulders, in drainages and on slopes, rarely on roadbanks, pine and oak woodlands
Elevation: 100–400 m

Discussion

Pentagramma pallida is endemic to the foothills of the Sierra Nevada. C. A. Weatherby (1920), K. S. Alt and V. Grant (1960), and D. M. Smith (1980) agreed that P. pallida is among the most easily distinguishable taxa in the group, particularly in the field. In addition to the key characteristics, the usually blackish, nonlustrous petioles of this species are unique in the genus. Alt and Grant noted a case of apparent hybridization between this species and Pentagramma triangularis in Tuolumne County, California.

Lower Taxa

None.

"thin" is not a number.

... more about "Pentagramma pallida"
George Yatskievych +  and Michael D. Windham +
(Weatherby) Yatskievych +
white-farinose +
pinnatifid +, 1-2-pinnate-pinnatifid +  and triangular-pentagonal +
herbaceous;leathery +
P. pallida (Weatherby) K. S. Alt & V. E. Grant +
100–400 m +
glandular +  and glabrous +
obcordate;reniform +
Rock crevices and at base of boulders, in drainages and on slopes, rarely on roadbanks, pine and oak woodlands +
monomorphic +
recurved +  and reflexed +
noncircinate +  and circinate +
5 cm50 mm <br />0.05 m <br /> (40 cm400 mm <br />0.4 m <br />) +
not recurved +
nearly;black +
nearly +  and rounded +
Amer. Fern J. +
smith1980a +  and weatherby1920a +
bicolored with black +
persistent +
tan +  and brown +
trigonal +, globose +  and globose-tetrahedral +
ascending +, erect +  and short-creeping +
Pentagramma pallida +
Pentagramma +
species +
crescent--shaped +  and roundish +