Flora of North America species comparison

erect, usually green, rarely flushed with red, unbranched or with branches arising obliquely from rosette and secondary branches arising from main stem, 60–180 cm.

1 or few-branched from base, 50–120 cm.

in a basal rosette and cauline, basal 10–30 × 2.5–5 cm, cauline 4–20 × 1–5 cm;

blade dull green, flat, narrowly oblanceolate, oblanceolate to narrowly elliptic, or narrowly lanceolate, margins bluntly dentate or subentire, teeth widely spaced;

bracts persistent.

in a basal rosette and cauline, basal 6–20 × 1–3 cm, blade lanceolate to narrowly elliptic;

cauline 5–10 × 1–2.5 cm, blade lanceolate to narrowly elliptic, margins subentire or repand-denticulate.

erect, usually unbranched, rarely with few lateral branches.

opening near sunset;

buds erect, 7–12 mm diam., with free tips terminal, erect, 0.5–3 mm;

floral tube persistent on ovary after anthesis, (60–)80–120(–160) mm;

sepals yellowish green, red-striped to red throughout, 30–55 mm;

petals yellow, fading orange or pale yellow, very broadly obcordate, 40–50 mm;

filaments 23–30 mm, anthers 12–22 mm, pollen 90–100% fertile;

style 90–170(–200) mm, stigma exserted beyond anthers at anthesis.

4-merous, zygomorphic, opening at sunset;

floral tube 10–11 mm;

sepals 11–15 mm;

petals white, fading pink, rhombic-obovate, 11–14 mm;

filaments 6.5–9 mm, anthers 2.5–4 mm, pollen 90–100% fertile;

style 22–28 mm, stigma exserted beyond anthers.

erect or slightly spreading, dull green or gray-green when dry, narrowly lanceoloid, 20–50 × 6–12 mm, free tips of valves 2.5–5 mm.

ellipsoid or ovoid, sharply 4-angled, with deep furrows alternating with angles for 2–3 mm from apex, ribbed from base of furrow to base of fruit, 9–11 × 3–5 mm;

sessile.

1–1.2 × 0.7–1.3 mm.

2–4, yellowish to light brown, 2–3 mm.

= 14.

= 14.