Perityle emoryi
Perityle warnockii
Emory's Rock daisy
Warnock's Rock daisy
petioles 3–45 mm;
blades ovate, cordate, suborbiculate, or triangular, 17–60 × 10–50 mm, margins deeply toothed, lobed, cleft, or divided, lobes indented to irregularly dissected.
petioles 2–5(–8) mm;
blades lance-ovate, ovate, or suborbiculate, 6–10 × 4–8(–10) mm, margins serrate.
1–70 mm.
1–7 mm.
campanulate to hemispheric.
campanulate.
usually 8–14, rarely rudimentary or 0;
corollas white, laminae oblong, 1–4(–6) × 1–3 mm.
0.
40–100+;
corollas yellow, tubes 0.7–1.3 mm, throats tubular to tubular-funnelform, 0.8–1.3 mm, lobes 0.1–0.2 mm.
9–12;
corollas bright white, tubes 0.6–1 mm, throats subfunnelform, 2–2.5 mm, lobes 1–1.6 mm.
10–20, lanceolate or oblanceolate to ovate-lanceolate, 4–6 × 1–2 mm.
9–10, linear to lanceolate, 5–7 × 1.2–2.2 mm.
borne singly or in corymbiform arrays, 4–10 × 4–10 mm.
borne singly (often partially obscured by leaves), 7–10 × 4–7 mm.
suboblong, oblanceolate, or subcuneate, (1.5–)2–3 mm, margins thin (not calloused), long- or short-ciliate;
pappi 0 or of 1 antrorsely to retrorsely barbellate bristles 1–3 mm plus crowns of hyaline, laciniate scales.
oblong to oblanceolate, 2.2–2.8 mm, margins notably calloused, glabrous;
pappi callous crowns, bristles 0.
= 65–72 or 100–116.
= 34.
Perityle emoryi
Perityle warnockii
Perityle emoryi is a widespread polyploid of diverse habitats and is often weedy. It is variable; none of the variation appears to have population significance and does not require taxonomic recognition. The range of P. emoryi appears to be gradually expanding.
(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.)
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