Flora of North America species comparison

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

(when present) ascending, (1–)several–10, densely leafy, 1–2 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.

primarily in a basal rosette, 7–14(–18) × (0.3–)0.5–1(–1.5) cm, moderately thick and stiff;

petiole (1.2–)3–5 cm;

blade linear to very narrowly elliptic, margins irregularly and coarsely dentate or pinnately lobed, apex long-attenuate.

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.

1–3 opening per day near sunset;

buds with unequal free tips 1–3 mm;

floral tube (53–)60–100 mm;

sepals 26–50 mm;

petals bright yellow, fading deep reddish orange, drying purplish brown, 28–50 mm;

filaments 21–35 mm, anthers 9–11 mm;

style 75–143 mm, stigma exserted beyond anthers.

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

leathery in age, oblong-oblanceoloid, narrowly winged, wings oblong, 1–2(–4) mm wide, broadest near apex, 14–18(–22) × 7–8 mm (excluding wings), apex abruptly constricted, dehiscent 1/4–1/3 their length, valve surface with inconspicuous veins;

sessile.

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

asymmetrically cuneiform, 2–2.5 mm.

= 14.

= 14.