Flora of North America species comparison

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

erect, red on proximal parts, green on distal ones, rarely red throughout, unbranched or with branches obliquely arising from rosette and secondary branches arising from main stem, 30–200 cm.

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.

in a basal rosette and cauline, basal 10–32 × 3–7 cm, cauline 6–20 × 2–8 cm;

blade green to pale green, narrowly oblanceolate to narrowly obovate, or narrowly elliptic, sometimes lanceolate distally, margins usually flat, rarely undulate, bluntly dentate, teeth widely spaced, sometimes sinuate-dentate proximally;

bracts caducous.

erect, unbranched or with secondary branches just proximal to main one.

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.

opening near sunset;

buds erect, 4–6 mm diam., with free tips terminal, erect, 1.5–6 mm;

floral tube 30–43 mm;

sepals yellowish green or flushed with red, 10–23 mm;

petals yellow to pale yellow, fading pale yellowish white, very broadly obcordate, 14–25(–30) mm;

filaments 10–25 mm, anthers 4–10 mm, pollen ca. 50% fertile;

style 35–63 mm, stigma surrounded by anthers at anthesis.

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.

erect or slightly spreading, dull green when dry, narrowly lanceoloid to narrowly ovoid, 12–36 × 3–6 mm, free tips of valves 1–1.5 mm.

asymmetrically cuneiform, 2–2.5 mm.

1–1.9 × 0.6–0.9 mm.

= 14.

= 14.