Flora of North America species comparison

usually several, decumbent, rarely 1 erect stem, 30–60 cm.

prostrate, decumbent, or ascending from base, to 60(–130) cm.

1–8 × 0.2–1.1 cm;

petiole 0–3 cm;

blade narrowly lanceolate-elliptic, base cuneate or subcordate, margins denticulate, apex acute.

0.5–5 × 0.3–2.2 cm;

petiole 0–1.5(–2.5) cm, distal ones to 1 cm;

blade narrowly ovate, base attenuate, cuneate, or cordate, margins sparsely serrulate, apex acute.

opening near sunrise;

floral tube 1.5–4 m;

sepals 1.7–3.4 mm;

petals yellow, with 1 or 2 red dots basally, 2.5–5.5 mm; episepalous filaments 2–2.8 mm, epipetalous filaments 1–1.7 mm, anthers 0.7–1.2 mm, less than 5% of pollen grains 4- or 5-pored;

style 2.8–4.5 mm, stigma surrounded by anthers at anthesis.

opening near sunrise;

floral tube 2.1–8.5 mm;

sepals 4–11.5 mm;

petals yellow, often red-dotted near base, 6–20 mm; episepalous filaments 2.8–8 mm, epipetalous filaments 1.5–6 mm, anthers 1–3 mm, less than 5% of pollen grains 4- or 5-pored;

style 6–23 mm, stigma surrounded by or exserted beyond anthers at anthesis.

usually loosely 1-coiled, conspicuously 4-angled in living material, 13–20 × 1.8–2.2 mm.

often coiled in 1–2 spirals, 4-angled, 10–25 × 2–2.5 mm.

0.7–0.8 mm.

1.2–1.3 mm.

= 14.