Flora of North America species comparison

erect to ascending, unbranched to much branched, 5–50 cm.

usually erect to slightly decumbent, unbranched to few-branched distally, (3–)15–30(–75) cm.

in a basal rosette and cauline, basal 4–15 × 1–3 cm, cauline 2–10 × 0.5–3.5 cm;

blade green, narrowly oblanceolate to narrowly elliptic or narrowly oblong, margins usually dentate or deeply lobed;

bracts spreading, flat.

in a basal rosette and cauline, basal 2–4 × 0.2–1.2 cm, petiole (0.2–)0.5–1.2(–2.5) cm, blade oblanceolate to obovate;

cauline 3–7 × 0.2–1.2 cm, petiole 0.1–1 cm, blade oblanceolate to obovate, margins entire or weakly and remotely denticulate.

nodding, flowers in axils of distalmost few nodes.

usually 1 opening per day near sunset;

buds erect, with free tips erect, 0.3–3 mm;

floral tube 12–35 mm;

sepals 5–15 mm;

petals yellow, fading orange or reddish tinged, broadly obovate or obcordate, 5–22 mm;

filaments 3–14 mm, anthers 4–5 mm, pollen ca. 50% fertile;

style 20–50 mm, stigma surrounded by anthers at anthesis.

opening near sunrise, nearly unscented;

buds with free tips to 1 mm, connivent;

floral tube 3–10 mm;

sepals 2–4 mm;

petals bright yellow, fading pale yellow, or orangish yellow to pale pink, 5–10 mm;

filaments 3–4 mm, anthers 1–2 mm, pollen 40–70% fertile;

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

cylindrical, sometimes slightly enlarged toward apex, 20–50 × 2–4 mm.

clavate, 4-angled or narrowly 4-winged, 5–10 × 2–3 mm, stipe 1–2 mm;

sessile.

ellipsoid to subglobose, 0.9–1.8 × 0.4–0.9 mm.

0.7–0.8 × 0.2–0.3 mm.

= 14.

= 14.