Flora of North America species comparison

branched mostly from base, 3–70 cm.

branched, 3–75 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.

primarily in basal rosette, cauline greatly reduced when present, 6–14 × 1.5–3.5 cm;

petiole 1.5–4(–11) cm;

blade pinnately lobed or lateral lobes greatly reduced or absent, often mixed on same plant, terminal lobe usually ovate, rarely elliptic, 2.5–6.9 × 1.5–7 cm, margins irregularly dentate, oil cells on abaxial surface inconspicuous.

nodding, elongating after anthesis.

nodding, mostly elongating after flowers.

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 sometimes individually reflexed, without free tips or with subapical free tips 1–2 mm, or with minute, apical free tips less than 1 mm;

floral tube 3–8 mm, densely short-villous inside proximally;

sepals 5–9 mm;

petals bright yellow, sometimes with red dots at base, fading yellow to orange or reddish, 3–18 mm;

stamens subequal, filaments 3–6 mm, anthers 2.5–6 mm, ciliate;

style 10–18 mm, stigma exserted beyond anthers at anthesis.

ascending to spreading, clavate, 8–40 mm;

pedicel 4–40 mm.

ascending or spreading, oblong-cylindrical, 18–92 mm;

pedicel 2–20 mm.

0.6–1.5 mm.

1–1.5 mm.