Flora of North America species comparison

slender, unbranched or branched, 10–20 cm.

usually well branched, forming bushy habit, 20–100 cm.

primarily cauline;

petiole 0.3–1.8 cm;

blade unlobed, narrowly ovate to elliptic, 0.3–2 × 0.3–1 cm, margins entire or inconspicuously denticulate, brownish oil cells lining veins abaxially.

cauline, mostly toward base;

petiole (0.7–)2.5–7.5 cm;

blade cordate-ovate to -orbiculate, 2.5–7.5 × 2.3–5.5 cm, smaller distally, margins erose-dentate.

erect, elongating in fruit.

nodding, congested.

opening at sunrise;

buds without free tips;

floral tube 0.4–0.5 mm, glabrous inside;

sepals 1–1.2 mm;

petals yellow, fading pale lavender, 1–1.5 mm;

stamens 4 (or 8), antisepalous, filaments 0.5 mm, anthers 0.5–0.7 mm, glabrous, when 8, then antipetalous ones smaller and abortive;

style 1.5 mm, stigma surrounded by anthers at anthesis.

floral tube 4.5–14 mm, villous inside;

sepals 3–9 mm;

petals yellow, 3–12 mm;

filaments 1–3 mm, anthers 2–4 mm;

style 8–23 mm, stigma surrounded by or exserted just beyond anthers at anthesis.

spreading or reflexed, clavate, 4–10 mm;

pedicel 3–9 mm.

ascending, cylindrical, 20–55 mm;

pedicel 1–18 mm.

0.8 mm.

0.5–0.7 mm.

= 14.