Flora of North America species comparison

moderately leafy, (1–)4–40(–60) cm.

erect, usually unbranched or with few ascending branches, 10–30(–45) 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 2–5 × 0.5–1.5 cm, petiole 0.5–2 cm, blade oblanceolate to elliptic, margins subentire;

cauline 3–6 × 0.2–0.6 cm, petiole 0.2–0.6(–1.5) cm, blade narrowly lanceolate to linear, margins subentire.

erect, flowers in leaf axils in distal 1/2 of plant.

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

opening near sunrise;

buds with free tips to 1 mm, erect to spreading;

floral tube 4–10 mm;

sepals 4–8 mm;

petals pale yellow, fading pale pink, 5–14 mm;

filaments 3–7 mm, anthers 2–4 mm, pollen 85–100% fertile;

style 3–7 mm, stigma surrounded by anthers.

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.

broadly clavate, 4-angled, 5–15 × 3–5 mm, stipe 2–5 mm;

sessile.

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

1 × 0.5 mm.

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.