Flora of North America species comparison

moderately leafy, (1–)4–40(–60) cm.

erect, green or flushed with red on proximal parts, sometimes inflorescence axis red, usually withside branches obliquely arising from rosette and secondary branches from main stem, 50–150 cm.

cauline, (2.8–)3.7–12.5(–17) × (0.1–)0.4–3(–4.5) cm;

petiole (0.4–)1–4(–6) cm;

blade linear, lanceolate-elliptic, elliptic to oblanceolate or suborbiculate, margins entire or conspicuously or inconspicuously denticulate or serrulate, sometimes undulate, apex usually acute, sometimes obtuse or retuse (subsp. incana).

in a basal rosette and cauline, basal 13–30 × 3–5 cm, cauline 5–15 × 2.5–4 cm;

blade dark to bright green, white- or red-veined, narrowly oblanceolate to oblanceolate, sometimes narrowly elliptic to lanceolate distally, margins usually conspicuously crinkled, sometimes undulate, bluntly dentate, teeth widely spaced, sometimes sinuate-dentate proximally or lobed;

bracts persistent.

erect, unbranched.

usually 1 or 2, rarely more, opening per day near sunset, fading next morning, sometimes (subspp.

opening near sunset;

buds erect, 7–9 mm diam., with free tips terminal, erect to spreading, 5–8 mm;

floral tube 35–50 mm;

sepals yellowish green, usually flushed with red or red-striped, sometimes very dark red throughout, 28–45 mm;

petals yellow to pale yellow, fading yellowish white and somewhat translucent, very broadly obcordate, 35–50 mm;

filaments 17–25 mm, anthers 10–12 mm, pollen ca. 50% fertile;

style 50–80 mm, stigma exserted beyond anthers at anthesis.

papery in age, narrowly ellipsoid to lanceoloid, sometimes twisted (subsp. fremontii), winged, wings (2–)10–28(–34) mm wide, body (13–)25–70(–115) × 2–9 mm, dehiscent 1/4–1/3 their length;

pedicel 1–12(–25) mm.

erect or slightly spreading, dull green when dry, lanceoloid, 20–35 × 5–6 mm, free tips of valves 0.8–1.5 mm.

numerous, rarely as few as 8, in 1 row per locule, obovoid, (2–)3–5 × 1–2.3 mm.

1.3–2 ×1–1.5 mm, ca. 50% abortive.

and oklahomensis) lasting for 2 days, weakly scented;

buds with unequal free tips 1–11(–15) mm;

floral tube (21–)35–140(–160) mm;

sepals (20–)25–65(–75) mm;

petals bright yellow, fading orange, reddish orange or mostly unchanged, obovate to very broadly obovate, (17–)25–65(–68) mm, usually with terminal notch and/or tooth, margin sometimes erose;

filaments 13–40(–44) mm, anthers 10–24(–25) mm;

style (45–)55–192 mm, stigma usually exserted beyond anthers at anthesis.

= 14.