Flora of North America species comparison

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

erect, with 1 or more branches from basal rosette, to 60 cm.

1–8 × 0.2–1.1 cm;

petiole 0–3 cm;

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

1–12 × 0.4–1.8 cm;

subsessile;

blade lanceolate, narrowly elliptic, or narrowly ovate, base truncate, margins dentate, 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 1.7–2 mm;

sepals 1.8–3.2 mm;

petals yellow, immaculate, 2–4 mm; episepalous filaments 1.5–2 mm, epipetalous filaments 1–1.5 mm, anthers 0.7 mm, 70–100% of pollen grains 4- or 5-pored;

style 3–4 mm, stigma surrounded by anthers at anthesis.

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

straight or 1-coiled, subterete in living material, obscurely 4-angled when dry, 13–25 × 1.3–1.6 mm.

0.7–0.8 mm.

0.7–1.1 mm.

= 14.

= 42.