Flora of North America species comparison

erect, with branches usually arising near base, 2–18(–35) cm.

1.2–3.8(–9.5) × 0.5–1.2(–1.8) cm;

petiole 0–3 cm;

blade (basal and proximal cauline) narrowly elliptic, (cauline) narrowly ovate, base attenuate, margins sparsely and inconspicuously denticulate, apex (basal) acute, (cauline) obtuse, rounded, or truncate.

opening near sunrise;

floral tube 1.6–2.4 mm;

sepals 1.9–3.2 mm;

petals yellow, each with 1 red dot near base, 2.8–4.2 mm; episepalous filaments 1.3–2.3 mm, epipetalous filaments 0.4–1.6 mm, anthers 0.4–0.8 mm, less than 5% of pollen grains 4- or 5-pored;

style 3.2–4.5 mm, stigma surrounded by anthers at anthesis.

stout, straight or slightly curved outward, 4-angled, 10–18 × 2.8–3.5 mm, deeply grooved along lines of dehiscence.

0.7–0.9 mm.

= 14.