Flora of North America species comparison

usually unbranched, sometimes branched from base, 3–45 cm.

primarily in basal rosette, cauline poorly developed or absent, 1–18 × 0.5–3.5 cm;

petiole 0.5–6.5 cm;

blade pinnately lobed or lateral lobes greatly reduced or absent, sometimes mixed on same plant, terminal lobe narrowly ovate to ovate or elliptic, 1–6.5 × 0.5–3.3 cm, margins irregularly dentate to subentire, oil cells on abaxial surface inconspicuous or conspicuous, pale yellowish brown or dark brown.

blade usually pinnately lobed, terminal lobe narrowly ovate to ovate or, sometimes, elliptic, 2–5 × 1–2.8 cm, margins dentate, oil cells on abaxial surface conspicuous, usually dark brown.

nodding, elongating in fruit.

opening at sunrise;

buds with or without subapical free tips less than 1 mm;

floral tube 1–4 mm, sparsely villous or glabrous inside;

sepals 1.2–5 mm;

petals bright yellow, often with red dots near base, fading pale yellow or yellowish orange, 1.5–5.5(–8) mm;

stamens unequal, filaments of antisepalous stamens 1.2–6 mm, those of antipetalous ones 0.5–4 mm, anthers 1–2.5 mm, ciliate or glabrous;

style 3–11 mm, stigma surrounded by anthers at anthesis.

petals 4–5.5(–8) mm.

ascending, clavate, 8–50 mm;

pedicel 4–20 mm.

16–38 mm.

1–2 mm.