Flora of North America species comparison

branched mostly from base, 3–70 cm.

slender, unbranched or branched from base, 10–60 cm.

primarily in basal rosette, cauline reduced or absent, 1.5–20 × 0.3–3.5 cm;

petiole 0.7–12 cm;

blade usually pinnately lobed, sometimes lateral lobes poorly developed or absent, terminal lobe usually narrowly ovate to lanceolate, sometimes cordate or subcordate, 0.8–9 × 0.2–4.5 cm, margins dentate, sinuate-dentate, or serrate, brown oil cells conspicuously lining veins abaxially.

in basal rosette and/or cauline, often purple-dotted, 2–22 × 0.4–3.5 cm;

petiole 0.4–8 cm;

blade pinnately lobed, sometimes lateral lobes greatly reduced or absent and blade reduced to terminal lobe only, terminal lobe oblong or cordate to ovate, 1–5 × 0.5–3.2 cm, margins serrate, brown oil cells prominently lining veins abaxially.

nodding, elongating after anthesis.

erect, elongating after anthesis.

opening at sunset or sunrise;

buds with or without subapical or apical free tips;

floral tube 2–6.5 mm, villous inside proximally;

sepals 2–8 mm;

petals pale to bright yellow or white, sometimes red- or purple-dotted near base, fading purple, sometimes red or orange, or not changing color, 1.5–8 mm;

stamens subequal, filaments 1.5–5.5 mm, anthers 1.5–6 mm, ciliate;

style 5–16 mm, stigma exserted beyond anthers at anthesis.

opening at sunrise;

buds individually reflexed, with apical free tips less than 1 mm;

floral tube 0.5–1.5 mm, glabrous or sparsely villous inside;

sepals 1.5–5 mm;

petals bright yellow, fading pale orange or lavender, 1–6 mm;

stamens unequal, filaments of antisepalous stamens 1–3 mm, those of antipetalous ones 0.3–2 mm, anthers 0.5–2 mm, glabrous or sparsely ciliate;

style 1.5–6 mm, stigma surrounded by anthers at anthesis.

ascending to spreading, clavate, 8–40 mm;

pedicel 4–40 mm.

spreading or ascending, oblong-cylindrical, 11–45 mm;

pedicel 5–30 mm.

0.6–1.5 mm.

0.6–1.2 mm.