Flora of North America species comparison

erect or ascending, unbranched or branched, 30–60 cm.

(when present) ascending, 1–several, densely leafy, 0–20 cm.

in a basal rosette and cauline, rosette weakly developed or absent, at least during flowering, 3–9 × (0.6–)1–2.5 cm;

petiole 0–2 cm;

blade oblong to lanceolate or narrowly ovate, margins irregularly sinuate-dentate.

in a basal rosette, sometimes also cauline, (2.5–)6–25(–32) × (0.6–)1.5–4(–5) cm, thin;

petiole (0.5–)1–8 cm;

blade oblanceolate to elliptic, margins irregularly pinnatifid, sometimes subentire, apex acute to obtuse or rounded.

1–several opening per day near sunset;

buds nodding, weakly quadrangular, with free tips 0.5–4 mm;

floral tube 30–50 mm;

sepals 20–30 mm, not spotted;

petals white, fading pink, broadly obovate, 20–30 mm;

filaments 10–15 mm, anthers 8–15 mm;

style 50–70 mm, stigma exserted beyond anthers at anthesis.

1–4 opening per day near sunset, without noticeable scent;

buds with subequal free tips 2–7 mm;

floral tube (20–)28–95(–138) mm;

sepals (6–)10–30(–35) mm;

petals pale yellow, fading pale orange, drying lavender, (10–)12–30(–38) mm;

filaments (5–)8–15(–18) mm, anthers (3.5–)4–11 mm;

style (3.4–)4.2–11.5(–16.3) mm, stigma usually surrounded by anthers, sometimes (especially in some Texas populations) exserted beyond anthers.

erect or strongly ascending, not woody, straight or slightly curved, subcylindrical, obtusely 4-angled, tapering gradually from base to apex, 20–30 × 2–3 mm;

sessile.

woody in age, rhombic-obovoid, winged, wings broadly triangular, 5–10 mm wide, often terminating in a hooked tooth, (10–)15–25(–28) × 4–8 mm (excluding wings), valve surface reticulate, dehiscent 1/8–1/3 their length.

numerous, in 1 row per locule, dark brown, narrowly obovoid, 1.5 mm.

asymmetrically cuneiform, (2.1–)2.5–3(–3.3) mm.

= 14.

= 14.