Flora of North America species comparison

erect or ascending, unbranched or branched, 30–60 cm.

several to many, decumbent to ascending, branched, 4–20(–30) cm.

in a basal rosette and cauline, rosette weakly developed or absent, at least during flowering, 3–9 × (0.6–)1–2.5 cm;

petiole 0–2 cm;

blade oblong to lanceolate or narrowly ovate, margins irregularly sinuate-dentate.

0.6–5 × 0.08–0.6 cm, fascicles of small leaves 0.2–1 cm often present in non-flowering axils;

petiole 0 cm;

blade narrowly lanceolate or narrowly oblanceolate, base attenuate to truncate, sometimes clasping, margins entire or subentire, sometimes revolute, sometimes weakly undulate, apex acute to obtuse.

1–several opening per day near sunset;

buds nodding, weakly quadrangular, with free tips 0.5–4 mm;

floral tube 30–50 mm;

sepals 20–30 mm, not spotted;

petals white, fading pink, broadly obovate, 20–30 mm;

filaments 10–15 mm, anthers 8–15 mm;

style 50–70 mm, stigma exserted beyond anthers at anthesis.

usually 1 per stem opening per day near sunset;

buds with free tips 0.3–3 mm;

floral tube 25–60 mm, funnelform in distal 1/2 or less;

sepals 8–20 mm;

petals yellow, fading pale pink or pale purple, 12–28 mm;

filaments 6–12 mm, anthers 5–11 mm, pollen 85–100% fertile;

style 30–75 mm, stigma yellow, quadrangular, usually exserted beyond anthers.

erect or strongly ascending, not woody, straight or slightly curved, subcylindrical, obtusely 4-angled, tapering gradually from base to apex, 20–30 × 2–3 mm;

sessile.

6–25 × 1–3 mm, hard, promptly dehiscent throughout their length.

numerous, in 1 row per locule, dark brown, narrowly obovoid, 1.5 mm.

obovoid, 1.5–2.5 mm.

= 14.

= 14.