Perityle tenella
Perityle stansburyi
Dixie or Springdale Rock daisy, Springdale rock-daisy
Stansbury's Rock daisy
petioles 2–8 mm;
blades usually broadly deltate-ovate, sometimes subovate or subcordate, 5–18(–25) × 4–18(–20) mm, (bases truncate) margins usually ± serrate, rarely laciniate.
petioles 3–10 mm;
blades subdeltate, suborbiculate, or subovate, 3–14 × 3–15 mm, margins usually 2–5-lobed or serrate, sometimes subentire or 3-lobed.
4–25 mm.
5–60 mm.
campanulate.
campanulate.
0.
6–14;
corollas yellow, laminae 3–6 × 1.2–3 mm.
23–35(–48);
corollas yellow, tubes (1–)1.2–1.6 mm, throats tubular to narrowly funnelform, 1.2–1.6(–2.2) mm, lobes 0.3–0.7 mm.
60–80;
corollas yellow, tubes 1.2–1.5 mm, throats tubular to subfunnelform, 2.4–3 mm, lobes 0.4–0.6 mm.
13–20, linear to narrowly or broadly lanceolate, 4–5(–6) × 0.8–1.3 mm.
14–22, lanceolate to broadly oblanceolate, 5–6 × 1–2 mm.
borne singly or (2–10) in corymbiform arrays, 6–7 × 4–6 mm.
borne singly or in corymbiform arrays, 7–8 × 5–9 mm.
narrowly oblanceolate, 2.5–3.3 mm, margins obviously calloused, minutely hairy;
pappi 0 or of 1(–3) moderately stout bristles 2–2.8(–4.1) mm plus callous crowns.
narrowly oblanceolate, 2–3.5 mm, margins thin-calloused, short-hairy;
pappi of single, ± stout bristles 2.5–4 mm plus crowns of vestigial, hyaline scales.
= 32.
= 34.
Perityle tenella
Perityle stansburyi
Of conservation concern.
Similarities of Perityle tenella to P. congesta are discussed under the latter. Perityle tenella occurs in northwestern Arizona, southeastern Nevada, and southwestern Utah.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Perityle stansburii with its large habit, relatively broad leaves, radiate heads, bristle pappus, chromosome number, and wide distribution, fills most expectations as the ancestral taxon of the group of related species called the “southwestern alliance.” This natural assemblage of taxa, which is thought to have evolved through geographic displacement and subsequent genetic differentiation, includes P. congesta, P. gracilis, P. intricata, P. inyoensis, P. megalocephala, P. specuicola, P. tenella, and P. villosa. These taxa, which are found mostly to the south and west of P. stansburii, all have rayless heads and may or may not have pappus bristles. In western and northwestern Utah and adjacent Nevada, P. stansburii occurs in crevices of rock exposures.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
CalFlora
WildflowerSearch
iNaturalist
USDA Plants Database
