Perityle coronopifolia
Perityle sect. Perityle
Arizona rockdaisy, crow-foot rock daisy
petioles 2–8(–12) mm;
blades pedately 3-lobed (lobes spatulate or linear), or 2–3-pinnatifid (lobes linear-filiform), 4–30 × 4–20 mm, ultimate margins entire.
7–15 mm.
campanulate.
campanulate to hemispheric, 3–11 × 4–14 mm.
8–12;
corollas white, laminae broadly oblong or oblong-elliptic to subspatulate, 3–7 × 2–3 mm.
0 or (1–)8–18;
corollas yellow or white.
30–40;
corollas yellow, often purple tinged, tubes 0.8–1 mm, throats tubular, tubular-funnelform, or tubular-campanulate, 1–1.3 mm, lobes 0.3–0.4 mm.
20–100+;
corollas yellow (sometimes pink or purple tinged).
2–16, linear-lanceolate to narrow-ovate, 3.5–5 × 0.5–1.5 mm.
(2–5) in corymbiform arrays, 5–6.5 × 5–6 mm.
linear-oblong to narrowly oblanceolate, 1.8–2.5 mm, margins usually prominently calloused, sometimes thin, usually ciliate;
pappi of 2(–3+) barbellulate bristles 1.5–2.5 mm plus crowns of hyaline, laciniate scales.
linear, linear-elliptic, linear-oblong, oblanceolate, oblong, ovate, or subcuneate, usually flattened (outer often 3-angled), margins usually prominently calloused, sometimes thin (not calloused), usually ± densely ciliate;
pappi 0 or of 1–2(–3+), unequal to subequal, ± barbellate bristles 0.5–4(–6) mm, sometimes plus crowns of hyaline, laciniate scales.
= 17, 19.
= 34.
Perityle coronopifolia
Perityle sect. Perityle
Perityle coronopifolia is widespread in south-central and southeastern Arizona, and southwestern and south-central New Mexico. The combination of white rays, often pinnatifid leaves, and perennial habit distinguish it.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Species 30 (7 in the flora).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
1. Ray florets 0 (Brewster and Terrell counties, Texas) | P. aglossa |
1. Ray florets usually 6–18 (sometimes 0 or 1–6 in P. parryi from w Presidio County, Texas) | → 2 |
2. Ray and disc corollas yellow; Texas | → 3 |
2. Ray corollas white, disc corollas yellow (sometimes purple tinged); Arizona, California, Nevada, New Mexico, Utah | → 4 |
3. Leaves usually cordate to subreniform, margins usually irregularly dentate, laciniate, or ± 3-lobed, seldom more divided (perennials or subshrubs in rock crevices or in soil) | P. parryi |
3. Leaves usually ternately lobed or ± cruciform, lobes usually again ternately lobed (perennials in soil) | P. vaseyi |
4. Annuals (sometimes persisting) | → 5 |
4. Subshrubs | → 6 |
5. Cypselae (1.5–)2–3 mm, margins thin (not calloused); pappi 0, or of single, antrorsely to retrorsely barbellate bristles 1–3 mm plus crowns of hyaline, laciniate scales | P. emoryi |
5. Cypselae 1.5–2 mm, margins prominently calloused; pappi of 2 unequal, antrorsely barbellate bristles 0.8–1.2 mm (the longest) plus crowns of hyaline, laciniate scales | P. microglossa |
6. Leaf blades deltate-ovate to ovate-rhombic, margins usually entire or serrate to serrate-crenate, sometimes shallow-lobed; c Arizona | P. ciliata |
6. Leaf blades pedately lobed (lobes spatulate or linear) or 2–3-pinnatifid (lobes linear-filiform); s Arizona, New Mexico | P. coronopifolia |
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