Flora of North America species comparison

erect to ascending, unbranched to much branched, 5–50 cm.

in a basal rosette and cauline, basal 4–15 × 1–3 cm, cauline 2–10 × 0.5–3.5 cm;

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

bracts spreading, flat.

in a basal rosette, 2.6–4.2(–6.2) × 1.4–4.2 cm;

petiole 2.5–9(–11.5) cm;

blade usually oblanceolate to obovate, sometimes suborbiculate, margins dentate, pinnately lobed, lateral lobes oblong to lanceolate, often absent or reduced to only a few lobes toward terminal lobe, base rounded to cordate.

usually 1 opening per day near sunset;

buds erect, with free tips erect, 0.3–3 mm;

floral tube 12–35 mm;

sepals 5–15 mm;

petals yellow, fading orange or reddish tinged, broadly obovate or obcordate, 5–22 mm;

filaments 3–14 mm, anthers 4–5 mm, pollen ca. 50% fertile;

style 20–50 mm, stigma surrounded by anthers at anthesis.

usually 1–3, rarely more, opening per day near sunset;

buds erect, quadrangular, without free tips;

floral tube 27–45(–55) mm;

sepals 25–30 mm;

petals intensely yellow, fading deep salmon red, obcordate, 25–38 mm;

filaments 17–23 mm, anthers 7–10 mm;

style 44–65(–80) mm, stigma somewhat exserted beyond anthers at anthesis.

cylindrical, sometimes slightly enlarged toward apex, 20–50 × 2–4 mm.

moderately thin and flexible, lanceoloid, falcate or sigmoid, often contorted and twisted, 4-angled, 35–90 × 7–11 mm, gradually tapering to a long, slender, sterile apex, 10–30(–40) mm, valves conspicuously wrinkled, dehiscent 2/3–3/4 their length;

sessile.

ellipsoid to subglobose, 0.9–1.8 × 0.4–0.9 mm.

numerous, in 1 row per locule, often forming 2 rows near base of capsule, obovoid, 2.4–3.2 × 1.3–1.7 mm, surface coarsely rugose.

= 14.

= 14.