Flora of North America species comparison

ascending to erect, with decumbent branches, thickened at base, tapering toward apex, 10–35(–60) cm.

erect, branched below and just above ground, branched also proximal to inflorescences, 60–250(–300) cm.

in a basal rosette and cauline, basal 5–10(–26) × 0.6–1.5(–3.5) cm, cauline 5–8(–15.5) × 1–2 cm;

petiole 0–12 cm;

blade lanceolate to oblanceolate, margins pinnatifid or sometimes coarsely serrate.

in a basal rosette and cauline, (1–)3–9 × (0.1–)0.5–1.3 cm, blade linear or narrowly lanceolate to narrowly oblanceolate, margins slightly to coarsely sinuate-dentate.

slender, often well-branched, buds small and well-spaced.

1–several opening per day near sunset;

buds nodding, weakly quadrangular, without free tips;

floral tube 26–31 mm;

sepals 19–26 mm, conspicuously maroon-spotted, each spot at base of a long hair;

petals white, fading pink to deep pink, broadly obovate or obcordate, 16–26(–36) mm;

filaments 9–15 mm, anthers 7–9 mm;

style 45–50 mm, stigma exserted beyond anthers at anthesis.

4-merous, zygomorphic, opening near sunset;

floral tube 2.5–6 mm;

sepals 5–12.5 mm;

petals white, fading pink to red, slightly unequal, elliptic, 5–10 mm, clawed;

stamens presented evenly around flower parts, filaments 3–8.5 mm, anthers 1.4–4 mm, pollen 90–100% fertile;

style 8.5–19 mm, stigma exserted beyond anthers at anthesis.

spreading, woody in age, curved upward, or distal end recurved, cylindrical, obtusely 4-angled, especially toward base, tapering gradually from base to apex, 30–80 × 2.5–3.5 mm;

sessile.

ovoid, narrowly 4-winged or 4-angled, 5–10 × 1.5–2 mm, abruptly constricted to a sterile stipe 0.5–4.5 mm.

numerous, in 1 row per locule, light brown to yellowish brown with dark purple splotches, obovoid, 1.6–2 mm.

1 or 2, yellowish to reddish brown, 1.5–3.5 × 1–1.5 mm.

= 14.

= 14.