Flora of North America species comparison

1–few-branched from base, 50–80(–100) cm.

in a basal rosette and cauline, basal 4–18 × 1.5–4 cm, blade very narrowly elliptic, lanceolate, or oblanceolate;

cauline 5–13 × 1–4 cm, blade narrowly elliptic, narrowly lanceolate, or narrowly oblanceolate, margins subentire or repand-denticulate.

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.

4-merous, zygomorphic, opening at sunset;

floral tube 8–12 mm;

sepals 9.5–13 mm;

petals white, fading pink, rhombic-obovate, 7–12 mm;

filaments 6.5–9 mm, anthers 2.5–4 mm, pollen 90–100% fertile;

style 19–25 mm, stigma exserted beyond 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.

ellipsoid or ovoid, sharply 4-angled, with fairly deep furrows alternating with angles, 6–8.5 × 2–3 mm;

sessile.

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.

1–4, yellowish to light brown, 2–3 × 1 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.