Perityle emoryi
Perityle congesta
Emory's Rock daisy
Grand Canyon rockdaisy, Kaibab or Grand Canyon 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 2.5–10(–15) mm (shorter than blades);
blades elliptic, lanceolate, or ovate, 5–17(–20) × 4–8(–10) mm, (bases cuneate) margins usually entire or with 2(–6) teeth.
1–70 mm.
3–17 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.
30–40;
corollas yellow, tubes 0.8–1 mm, throats tubular to subfunnelform, 1.2–1.5 mm, lobes 0.3–0.5 mm.
10–20, lanceolate or oblanceolate to ovate-lanceolate, 4–6 × 1–2 mm.
12–16, narrowly lanceolate, oblong-lanceolate, or lanceolate, 3.2–4.5 × 0.8–1.4 mm.
borne singly or in corymbiform arrays, 4–10 × 4–10 mm.
borne singly or (2–8) in corymbiform arrays, 5–6(–6.5) × 3.5–4.5(–5) 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.
narrowly oblanceolate, (2–)2.5–3 mm,margins thin-calloused, short-hairy;
pappi of 1–2 subequal or unequal bristles 2–2.7 mm.
= 65–72 or 100–116.
= 32.
Perityle emoryi
Perityle congesta
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.
The leaf blades of Perityle congesta usually have a tooth on each margin, cuneate bases, and unobtrusive veins abaxially; those of P. tenella usually have serrate margins, truncate bases, and raised veins abaxially. Perityle congesta is found on both rims and extending into the Grand Canyon and northward almost to the Utah border. Available specimens suggest that P. congesta and P. tenella intergrade where their ranges overlap in northwestern Arizona on the Colorado Plateau. Specimens from the Colorado Plateau have intermediate leaf shapes and induments.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
CA
WildflowerSearch
iNaturalist
USDA Plants Database
