Perityle megalocephala
Perityle warnockii
bighead rockdaisy, large head rock daisy, limestone rockdaisy, Nevada Rock daisy
Warnock's Rock daisy
petioles 1–6 mm;
blades usually elliptic, lanceolate, lance-ovate, ovate, or suborbiculate, sometimes linear, 4–8(–15) × 1–10(–12) mm, margins entire, irregularly and sparsely serrate, or serrate-lobed.
petioles 2–5(–8) mm;
blades lance-ovate, ovate, or suborbiculate, 6–10 × 4–8(–10) mm, margins serrate.
10–45(–80) mm.
1–7 mm.
campanulate.
campanulate.
0.
0.
45–60;
corollas yellow, tubes 1–1.6 mm, throats tubular to subfunnelform, 1.6–2.2 mm, lobes 0.4–0.7 mm.
9–12;
corollas bright white, tubes 0.6–1 mm, throats subfunnelform, 2–2.5 mm, lobes 1–1.6 mm.
14–20, lanceolate to suboblanceolate, 5–6 × 1.3–1.9 mm.
9–10, linear to lanceolate, 5–7 × 1.2–2.2 mm.
borne singly or (2–3) in loose, corymbiform arrays, 6–9(–10) × 5–6(–8) mm.
borne singly (often partially obscured by leaves), 7–10 × 4–7 mm.
narrowly oblanceolate to suboblanceolate, 2.5–3 mm, margins thin-calloused, short-hairy;
pappi 0, or of single bristles.
oblong to oblanceolate, 2.2–2.8 mm, margins notably calloused, glabrous;
pappi callous crowns, bristles 0.
= 34.
Perityle megalocephala
Perityle warnockii
Varieties 2 (2 in the flora).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
1. Leaf blades ovate, lanceolate-ovate or elliptic to suborbiculate | var. megalocephala |
1. Leaf blades linear to lanceolate | var. oligophylla |
CA
WildflowerSearch
iNaturalist
USDA Plants Database
