Flora of North America species comparison

1–many, weakly decumbent to ascending or erect, unbranched to moderately branched, (10–)25–80 cm.

erect to decumbent, branched or unbranched, (10–)30–80 cm.

1–9 × (0.1–)0.3–1 cm, sometimes fascicles of small leaves to 2 cm present in non-flowering axils;

petiole 0–0.6 cm;

blade linear to narrowly lanceolate or oblanceolate, often folded lengthwise, usually not much reduced distally, proximalmost leaves sometimes spatulate, base attenuate, margins subentire or serrulate or spinulose-serrate, apex acute.

in a basal rosette and cauline, rosette usually withered by anthesis, surfaces sometimes glaucous, especially abaxially, basal 3–12 × 0.5–3 cm, petiole 1–4 cm, blade oblanceolate to obovate, margins subentire, dentate, or denticulate, sometimes undulate;

cauline 2–6(–11) × (0.1–)0.5–2(–5) cm, petiole 0.1–2(–6) cm, blade linear, lanceolate to oblanceolate, narrowly elliptic, or ovate, margins subentire or dentate or denticulate, sometimes undulate.

usually erect, rarely nodding, flowers in axils of distalmost few nodes.

opening at sunrise;

buds with free tips 0–4 mm;

floral tube 5–20 mm;

sepals 4–12 mm, midribs keeled;

petals yellow, fading orangish to purplish, 6–25 mm; antisepalous filaments 2–8 mm, antipetalous filaments 1–4 mm, anthers 2–7 mm, pollen 90–100% fertile;

style 9–30 mm, stigma sometimes blue-black, discoid to quadrangular, exserted beyond anthers.

opening near sunrise;

buds with free tips 0.5–8(–13) mm, connivent, sometimes spreading;

floral tube 5–20 mm;

sepals 5–20 mm;

petals pale to bright yellow, fading pale pink, orangish pink, or yellow, (8–)15–25(–30) mm;

filaments 5–15 mm, anthers 4–7 mm, pollen 85–100% fertile;

style 12–20 mm, stigma exserted beyond anthers at anthesis.

10–35 × 1–2 mm, hard, dehiscent 1/2 their length, often tardily dehiscent throughout their length.

clavate to oblong-clavate or oblong-ellipsoid, 4-angled to 4-winged, (5–)10–17(–20) × (2–)3–4(–6) mm, stipe 0.1–10 mm;

sessile.

obovoid, 1–1.8 mm, sharply angled, apex truncate.

1 × 0.5 mm.