Flora of North America species comparison

erect, usually branched several cm belowground or from near base, sometimes also branched distally, 20–60(–100) cm.

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

in a basal rosette and cauline, basal 2–4 × 0.4–0.8 cm, petiole0–0.4 cm, blade narrowly oblanceolate to narrowly spatulate;

cauline 0.5–5 × 0.1–0.8 cm, petiole 0–0.3 cm, blade narrowly lanceolate or very narrowly elliptic, margins subentire or sinuate-denticulate.

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.

4-merous, nearly actinomorphic, opening near sunset;

floral tube 9–13 mm;

sepals 7–9 mm;

petals white, fading pink to pale red, slightly unequal, rhombic, 7–8 mm, short-clawed;

filaments 3–4 mm, anthers 4–5 mm, pollen 85–100% fertile;

style 18–22 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, fusiform, often slightly curved, weakly 4-angled, (9–)13–17 × 2–3 mm, valves with inconspicuous raised midrib;

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.

(1–)3 or 4, yellowish or light brown, 2–3.5 × 1–2 mm.

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

= 14.

= 14.