Flora of North America species comparison

erect to decumbent, much branched, 10–50(–90) cm.

erect to ascending, usually unbranched, 10–40 cm.

in a basal rosette and cauline, basal 4–8 × 0.7–1 cm, cauline 1–7 × 0.3–1.5 cm;

blade usually grayish green, narrowly oblong to narrowly elliptic or narrowly obovate, margins remotely shallowly dentate to subentire;

bracts spreading, flat.

in a basal rosette and cauline, basal 5–12 ×1.3–3.5 cm, cauline 2–8.5 ×1–3 cm;

blade green, narrowly oblanceolate to narrowly elliptic or narrowly lanceolate, margins usually dentate to pinnatifid, sometimes subentire;

bracts spreading, flat.

usually 1 opening per day near sunset;

buds erect, with free tips erect and appressed or slightly spreading, 0.5–2 mm;

floral tube 15–35 mm;

sepals3–11 mm;

petals yellow, very broadly obovate or obcordate, 4.5–16 mm;

filaments 4–11 mm, anthers 2–5.5 mm, pollen ca. 50% fertile;

style 23–45 mm, stigma surrounded by anthers at anthesis.

usually 1 opening per day near sunset;

buds erect, with free tips erect, 0.5–2 mm;

floral tube 25–40 mm;

sepals 10–22 mm;

petals yellow, fading orange or reddish tinged, broadly obovate or shallowly obcordate, 13–25 mm;

filaments 10–17 mm, anthers 4–5 mm, pollen 85–100% fertile;

style 35–50 mm, stigma slightly exserted beyond anthers at anthesis.

cylindrical, sometimes slightly enlarged toward apex, 15–45 × 2–3 mm.

cylindrical, sometimes slightly enlarged toward apex, 20–45 × 2–2.5 mm.

usually ellipsoid to broadly ellipsoid, rarely subglobose, 1–2 × 0.5–0.9 mm.

ellipsoid, 0.8–1.4 × 0.3–0.6 mm.

= 14.

= 14.