Flora of North America species comparison

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

blade usually unlobed, rarely pinnately lobed with few, small lateral lobes, terminal lobe ovate, 1.7–3.5 × 1–1.5 cm, margins subentire, oil cells on abaxial surface inconspicuous, usually pale yellowish brown, rarely darker.

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.

nodding, elongating in fruit.

petals 1.5–2 mm.

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.

25–50 mm.

ascending, clavate, 8–50 mm;

pedicel 4–20 mm.

1–2 mm.