Flora of North America species comparison

erect, green, flushed with red proximally or red throughout, unbranched or branches obliquely arising from rosette and sometimes secondary branches arising from main stem, 50–100 cm.

(when present), usually ascending or decumbent, unbranched or branched from near base, 0–40 cm.

in a basal rosette and cauline, basal 13–35 ×1.5–4(–5) cm, cauline 5–18 × 1–2.5(–4) cm;

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

bracts persistent.

1.7–26(–36) × (0.3–)0.5–4.5(–6.5) cm;

petiole (0.2–)1.7–11(–14) cm;

blade usually oblanceolate to rhombic or spatulate, rarely elliptic, obovate, lanceolate, or linear-oblanceolate, margins irregularly sinuate-dentate, serrate, pinnatifid, lobed, or subentire, apex usually acute to rounded, rarely acuminate.

erect, unbranched.

opening near sunset;

buds erect, 5–8 mmdiam., with free tips terminal, erect, 1–3 mm;

floral tube 30–46 mm;

sepals yellowish green, also usually flushed with red or red-striped, 17–28 mm;

petals yellow, fading orange, pale yellow and somewhat opaque, very broadly obcordate, 13–23 mm, conspicuously shorter than sepals;

filaments 12–20 mm, anthers 7–12 mm, pollen ca. 50% fertile;

style 43–58 mm, stigma usually slightly exserted beyond anthers or surrounded by them at anthesis.

1–4(–6) per stem opening per day near sunset, with moderate to strong sweet scent with a rubbery background scent;

buds usually erect, rarely recurved (during early development);

floral tube (20–)40–140(–165) mm;

sepals (15–)18–45(–54) mm;

petals white, fading rose or rose pink to dark or deep rose purple, or pink to pale or light rose, or lavender, obovate or obcordate, (16–)20–50(–60) mm;

filaments (6–)10–30(–35) mm, anthers (6–)9–17(–20) mm;

style (45–)60–180(–185) mm, stigma exserted beyond anthers at anthesis.

erect or slightly spreading, dark dull green and sometimes red-striped when dry, narrowly lanceoloid, 30–48 × 5–7 mm, free tips of valves 0.5–2.5mm.

straight, curved, falcate, or sigmoid, usually cylindrical to lanceoloid or ellipsoid, sometimes ovoid, usually obtusely 4-angled, (10–)13–50(–68) × 4–9 mm, tapering to a sterile beak 6–8 mm, valve margins with rows of distinct tubercles to sinuate or nearly smooth ridges, dehiscent 1/3–7/8 their length;

pedicel (0–)1–40(–55) mm.

0.9–2 × 0.9–1.3 mm.

numerous in 1 or 2 rows per locule, usually obovoid, oblong, or triangular, rarely suborbicular, 2.1–3.9 × 1–2.6 mm, embryo 1/5–2/3 of seed volume, surface papillose, reticulate or rarely irregularly roughened;

seed collar sealed by a thin membrane, this flat or depressed into raphial cavity, when depressed often splitting, becoming separated from seed collar.

= 14.

= 14, 28.