Flora of North America species comparison

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

often intricately branched, 5–80 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.

in poorly defined basal rosette and also cauline;

petiole 0.3–3.8 cm;

blade usually unlobed, very rarely pinnately lobed with few, small lateral lobes, ovate to elliptic, margins sparsely denticulate to subentire, pale or dark brown oil cells lining veins abaxially.

erect, elongating after anthesis.

nodding, with intricate, filiform branches, elongating in fruit.

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.

opening at sunrise;

buds without free tips;

floral tube 0.5–2 mm, glabrous or villous inside;

sepals 1.5–4 mm;

petals bright yellow, often with red dots near base, fading pale yellow or yellowish orange, 2–7 mm;

stamens unequal, filaments of antisepalous stamens 1.7–3.5 mm, those of antipetalous ones 1.2–2.5 mm, anthers 0.9–1.2 mm, glabrous;

style 4–9 mm, stigma exserted beyond anthers at anthesis.

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

pedicel 5–30 mm.

erect or ascending, clavate, 4–10 mm;

pedicel 4–20 mm.

0.6–1.2 mm.

0.7–1.2 mm.

= 14.