Flora of North America species comparison

erect, green or red on proximal parts or throughout, mostly branched from base or only in distal 1/2, 30–150 cm.

1–many, erect to ascending, unbranched to densely branched, 4–60 cm.

in a basal rosette and cauline, basal 10–30 × 1–4 cm, cauline 4–18 × 1–3 cm;

blade usually bright green, sometimes pale green distally, white- or red-veined, narrowly oblanceolate, narrowly elliptic to lanceolate, or oblong, margins usually flat, rarely undulate, regularly dentate to remotely denticulate, sometimes teeth widely spaced;

bracts persistent.

0.3–6.5 × 0.04–1.2 cm, sometimes fascicles of small leaves 0.1–1.5 cm present in non-flowering axils;

petiole 0–0.2 cm;

blade elliptic, lanceolate, linear, or filiform to ovate or oblanceolate, usually not much reduced distally, proximalmost leaves sometimes obovate to spatulate, base attenuate to obtuse, truncate, or subcordate, sometimes clasping, margins entire or serrate, often undulate, apex acute.

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

opening near sunset;

buds erect, 3–5 mm diam., with free tips subterminal, spreading to erect, 0.5–5 mm;

floral tube 22–40 mm;

sepals green to yellowish green or flushed with red or dark red, sometimes only red-flecked, 7–17 mm;

petals yellow to pale yellow, fading pale yellow to pale yellowish orange, very broadly obcordate, 8–15(–20) mm;

filaments 7–13 mm, anthers 3.5–6 mm, pollen ca. 50% fertile;

style 25–50 mm, stigma surrounded by anthers at anthesis.

usually 1 per stem opening per day in afternoon or near sunset;

buds with free tips 0.5–6 mm;

floral tube 16–50(–60) mm, funnelform in distal 1/2 or less;

sepals 7–28 mm;

petals yellow, fading pale pinkish or pale purple, 10–35 mm;

filaments 4–13 mm, anthers 5–13 mm, pollen 85–100% fertile;

style 25–65(–75) mm, stigma yellow, quadrangular, usually exserted beyond anthers.

erect or slightly spreading, usually greenish black when dry, narrowly lanceoloid to lanceoloid, 20–40 ×3.5–5 mm, free tips of valves 1–1.5 mm.

6–40 × 2–4 mm, hard, promptly dehiscent throughout their length.

1.1–1.8 × 0.5–1 mm.

obovoid, 1–2.5 mm.

= 14.

= 14, 28.