Flora of North America species comparison

erect to decumbent, with non-flowering lateral branches, these often with terminal rosette of crowded, small leaves, 10–50 cm.

in a basal rosette and cauline, basal 5–14 × 1–2 cm, cauline 1–8 × 0.5–2.5 cm;

blade grayish green, narrowly oblanceolate to elliptic, becoming elliptic to narrowly obovate to obovate distally, margins subentire or shallowly dentate;

bracts spreading, flat.

1–few opening per day near sunset;

buds erect, with free tips erect, 1–3 mm;

floral tube 25–50 mm;

sepals 20–30 mm;

petals yellow, very broadly obovate or obcordate, 25–45 mm;

filaments 10–23 mm, anthers 4–12 mm, pollen 85–100% fertile;

style 35–75 mm, stigma exserted beyond anthers at anthesis.

cylindrical, sometimes slightly enlarged toward apex, 25–55 × 2–3 mm.

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

= 14.