Flora of North America species comparison

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

usually well branched, forming bushy habit, 20–100 cm.

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.

cauline, mostly toward base;

petiole (0.7–)2.5–7.5 cm;

blade cordate-ovate to -orbiculate, 2.5–7.5 × 2.3–5.5 cm, smaller distally, margins erose-dentate.

erect, elongating after anthesis.

nodding, congested.

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.

floral tube 4.5–14 mm, villous inside;

sepals 3–9 mm;

petals yellow, 3–12 mm;

filaments 1–3 mm, anthers 2–4 mm;

style 8–23 mm, stigma surrounded by or exserted just beyond anthers at anthesis.

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

pedicel 5–30 mm.

ascending, cylindrical, 20–55 mm;

pedicel 1–18 mm.

0.6–1.2 mm.

0.5–0.7 mm.