Perityle warnockii

A. M. Powell

Sida 3: 177, fig. 1. 1966.

Common names: Warnock’s rock daisy
EndemicConservation concern
Treatment appears in FNA Volume 21. Treatment on page 325. Mentioned on page 324.

Perennials or subshrubs, 2–10 cm; densely scabrous-pubescent. Leaves: petioles 2–5(–8) mm; blades lance-ovate, ovate, or suborbiculate, 6–10 × 4–8(–10) mm, margins serrate. Heads borne singly (often partially obscured by leaves), 7–10 × 4–7 mm. Peduncles 1–7 mm. Involucres campanulate. Phyllaries 9–10, linear to lanceolate, 5–7 × 1.2–2.2 mm. Ray florets 0. Disc florets 9–12; corollas bright white, tubes 0.6–1 mm, throats subfunnelform, 2–2.5 mm, lobes 1–1.6 mm. Cypselae oblong to oblanceolate, 2.2–2.8 mm, margins notably calloused, glabrous; pappi callous crowns, bristles 0. 2n = 34.


Phenology: Flowering spring–fall.
Habitat: Limestone
Elevation: 500–700 m

Discussion

Of conservation concern.

Perityle warnockii is known only from the type locality in Val Verde County. The relationship of P. warnockii to P. bisetosa is evidenced by its similar though often reduced vegetative and floral morphology. The two species may have been derived separately from a common ancestor, perhaps a white-flowered member of sect. Pappothrix such as P. vitreomontana.

Selected References

None.

Lower Taxa

None.
... more about "Perityle warnockii"
Sharon C. Yarborough +  and A. Michael Powell +
A. M. Powell +
Undefined sect. Laphamia +
Warnock’s rock daisy +
500–700 m +
Limestone +
Flowering spring–fall. +
Endemic +  and Conservation concern +
Undefined (tribe Undefined) subtribe Amauriinae +
Perityle warnockii +
Perityle sect. Laphamia +
species +