Flora of North America species comparison

erect, branched below and just above ground, branched also proximal to inflorescences, (40–)60–250 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.

in a basal rosette and cauline, basal 3–13 × 0.6–2.5 cm, blade spatulate to oblanceolate, cauline (1–)2.5–12 × 0.1–1 cm, blade linear to narrowly oblanceolate, margins slightly to conspicuously sinuate-dentate.

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.

slender.

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

4-merous, zygomorphic, opening near sunset;

floral tube 3–9 mm;

sepals 6–12 mm;

petals white, fading dark pink to red, slightly unequal, elliptic-obovate, 7–11 mm;

stamens presented in lower 1/2 of flower, filaments 3–7 mm, anthers 2.5–5 mm, pollen 90–100% fertile;

style 9.5–19 mm, stigma exserted beyond anthers at anthesis.

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.

lanceoloid to narrowly ovoid, narrowly 4-winged, 7–12 × 1.5–2.5 mm, tapered to a sterile stipe 2–5 mm.

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.

(2 or)3 or 4(or 5), light brown or reddish brown, 1.5–2.5 × 0.8–1.3 mm.

1–1.9 × 0.6–0.9 mm.

= 14.

= 14.