Perityle megalocephala
Perityle ajoensis
bighead rockdaisy, large head rock daisy, limestone rockdaisy, Nevada Rock daisy
Ajo 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.
(proximally opposite, distally alternate): petioles 3–10 mm;
blades deltate, ovate, or suborbiculate, 5–15 × 5–15 mm, margins shallow-crenate to dentate.
10–45(–80) mm.
5–15 mm.
campanulate.
campanulate to hemispheric.
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.
20–45;
corollas yellow, tubes 1–1.2 mm, throats tubular to narrowly funnelform, 1.3–1.6 mm, lobes 0.4–0.6 mm.
14–20, lanceolate to suboblanceolate, 5–6 × 1.3–1.9 mm.
15–20, oblanceolate to broadly lanceolate, 4–5 × 0.8–1.8 mm.
borne singly or (2–3) in loose, corymbiform arrays, 6–9(–10) × 5–6(–8) mm.
borne singly or (2–10) in loose, corymbiform arrays, 7–9 × 6–9 mm.
narrowly oblanceolate to suboblanceolate, 2.5–3 mm, margins thin-calloused, short-hairy;
pappi 0, or of single bristles.
narrowly suboblong to oblanceolate, 2.5–3.5 mm, margins prominently calloused, short-hairy;
pappi of 1(–2) stout bristles 1.8–2.8 mm.
= 34.
Perityle megalocephala
Perityle ajoensis
Varieties 2 (2 in the flora).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Of conservation concern.
Perityle ajoensis occurs in the Ajo Mountains of Organ Pipe Cactus National Monument in Pima County.
(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
