Flora of North America species comparison

usually well-branched distal to base, 50–400 cm.

erect, red on proximal parts, usually green on distal ones, rarely red throughout, unbranched or with branches obliquely arising from rosette and secondary branches arising from main stem, 100–300(–400) cm.

in a basal rosette and cauline, 3–7 × 0.2–0.8 cm;

blade narrowly elliptic to elliptic or lanceolate, margins subentire or shallowly undulate-denticulate.

in a basal rosette and cauline, basal 18–32 × (2–)3–6.5 cm, cauline 6–20 × 1.5–6.5 cm;

blade soft and thin, bright green, usually flat, rarely undulate, narrowly oblanceolate to narrowly obovate, or narrowly elliptic to elliptic, sometimes narrowly ovate distally, margins bluntly dentate or subentire, teeth widely spaced, sometimes sinuate-dentate proximally or lobed;

bracts usually caducous.

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

4-merous, zygomorphic, opening at sunrise;

floral tube 4–13(–15) mm;

sepals 13–20 mm;

petals white, fading pink, rhombic-obovate, 10–17 mm;

filaments 8–17 mm, anthers 3–7 mm, pollen 90–100% fertile;

style 18–32 mm, stigma exserted beyond anthers at anthesis.

opening near sunset;

buds erect, 5–9 mm diam., with free tips terminal, erect, 2–9 mm;

floral tube 35–55 mm;

sepals yellowish green or flushed with red, 22–46 mm;

petals yellow to pale yellow, fading pale yellowish white, very broadly obcordate or obovate, (25–)30–45 mm;

filaments 18–27 mm, anthers 10–15 mm, pollen 90–100% fertile;

style 57–90 mm, stigma exserted beyond anthers at anthesis.

ellipsoid or ovoid, sharply 4-angled, 4.5–7 × 1.5–2.5 mm;

sessile.

erect or slightly spreading, dull green when dry, narrowly lanceoloid to narrowly ovoid, 15–35 × 3.5–5.5 mm, free tips of valves 0.5–2.5 mm.

2–4, yellowish to reddish brown, 1.2–3 × 0.7–1.3 mm.

1–1.7 × 0.6–1.2 mm.

= 14.

= 14.