Perityle megalocephala
Perityle dissecta
bighead rockdaisy, large head rock daisy, limestone rockdaisy, Nevada Rock daisy
dissected rockdaisy, slim-lobe or dissected 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 (3–)4–10 mm;
blades lanceolate to deltate, 4–15 × 4–15 mm, usually 1–3-pinnately divided, lobes irregular, rounded, ultimate margins laciniate.
10–45(–80) mm.
2–8(–17) 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.
20–30;
corollas yellow, tubes 1–1.5 mm, throats usually narrowly tubular, (2–)2.5–2.8 mm, lobes 0.7–1 mm.
14–20, lanceolate to suboblanceolate, 5–6 × 1.3–1.9 mm.
12–15, linear to linear-lanceolate, (5–)7–13 × 0.5–0.9 mm (apices usually attenuate, sometimes acute).
borne singly or (2–3) in loose, corymbiform arrays, 6–9(–10) × 5–6(–8) mm.
borne singly or in corymbiform arrays, 8–10 × 4–5 mm.
narrowly oblanceolate to suboblanceolate, 2.5–3 mm, margins thin-calloused, short-hairy;
pappi 0, or of single bristles.
oblong to narrowly oblanceolate, (2.8–)3–3.8 mm, margins moderately calloused, short-hairy;
pappi 0, or of 1(–4) moderately stout bristles (1–)2.2–3 mm.
= 34, 68.
Perityle megalocephala
Perityle dissecta
Varieties 2 (2 in the flora).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Of conservation concern.
Perityle dissecta occurs in southern Brewster and Presidio counties. It and P. lemmonii have been considered conspecific by some taxonomists because of similarities in gross leaf morphology. The differences in phyllaries, disc corollas, and pappus bristles, as well as distinct distributions, support recognizing them as separate species.
(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
