Flora of North America species comparison

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

unbranched or with branched central stem and ascending to decumbent lateral branches arising from rosette, 5–50(–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, basal 5–14 × 0.5–2.5 cm, cauline 2–8 × 0.5–2.5 cm;

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

bracts spreading, flat.

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.

usually 1 opening per day near sunset;

buds with free tips erect, 0.1–1 mm;

floral tube erect, becoming recurved and nodding, then erect again just before anthesis, 15–50 mm;

sepals 5–25 mm;

petals yellow, fading reddish orange, broadly obovate to obcordate, 5–25(–35) mm;

filaments 6–18 mm, anthers (2–)3–9 mm, pollen ca. 50% fertile;

style 20–60 mm, stigma surrounded by or slightly exserted beyond anthers at anthesis.

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

cylindrical, sometimes slightly enlarged distally, 20–45 ×2–4 mm.

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

brown, sometimes dark-flecked, 0.9–1.5 × 0.6–1 mm.

= 14.