Flora of North America species comparison

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

erect, usually with 1+ ascending branches from basal rosette, 30–60 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 × 0.2–1.7 cm;

petiole 0–1 cm, distal ones sessile;

blade lanceolate to narrowly ovate, base cuneate to truncate, basal and proximal cauline often attenuate, margins denticulate, 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 1.2–2 mm;

sepals 1–2.5 mm;

petals yellow, with 1 or 2 red dots basally, 1.5–3.5(–4.5) mm; episepalous filaments 0.8–1.5 mm, epipetalous filaments 0.5–0.9 mm, anthers 0.4–0.5 mm, less than 5% of pollen grains 4- or 5-pored;

style 2–3.5 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 spiral, subterete in living material, 4-angled when dry, 13–25 × 1.1–1.2 mm.

0.7–0.8 mm.

0.7–1.1 mm.

= 14.

= 28.