Dimorphotheca pluvialis (L.) Moench

Plants with "intermediate" ray-corolla colors have been treated as hybrids between Dimorphotheca pluvialis and D. sinuata (e.g., N. T. Norlindh 1943).

Annuals, 5–20(–40+) cm. Leaf blades narrowly oblong or oblanceolate to linear, 15–50(–100+) × 3–15(–25+) mm, mar-gins usually dentate to pinnatifid, sometimes entire. Peduncles (3–)5–12+ cm. Phyllaries 6–12+ mm. Ray corolla laminae abaxially white to ochroleucous or yellowish (often marked with blue to purple), adaxially mostly whitish (often blue to purplish at bases and/or apices), 20–30+ mm. Disc florets 30–50+; corollas whitish to yellowish, usually bluish to purplish distally, 4–6 mm (lobe apices acute, terete, or dilated). Ray cypselae 4–6 mm; disc cypselae 6–8 mm. 2n = 18.

Calendula pluvialis Linnaeus, Sp. Pl. 2: 921. 1753