Flora of North America species comparison

erect to ascending, often with ascending lateral branches, 15–60(–100) cm.

decumbent, usually branched, 10–30 cm, becoming woody and buried in sand.

in a basal rosette and cauline, basal 5–13 × 1–3 cm, cauline 3–10 × 1.5–3.5 cm;

blade green, narrowly oblanceolate to narrowly elliptic, margins lobed or dentate, lobes often dentate;

bracts spreading, flat.

(6–)8–9(–14.2) × (0.7–)1.5–2(–3.1) cm;

petiole 3–9 cm;

blade narrowly oblanceolate to oblanceolate, margins usually subentire or repand or remotely dentate, rarely serrate, apex acute.

1–few opening per day near sunset;

buds erect, with free tips terminal, erect or hornlike, 1.5–5 mm;

floral tube 25–45 mm;

sepals 15–30 mm;

petals yellow, very broadly obovate or shallowly obcordate, 25–40 mm;

filaments 12–22 mm, anthers 4–11 mm, pollen 85–100% fertile;

style 40–75 mm, stigma exserted beyond anthers at anthesis.

1–3 per stem opening per day near sunset, with sweet scent;

buds erect;

floral tube 42–60 mm;

sepals 22–28 mm;

petals white, fading rose pink to rose, 23–40 mm;

filaments 17–19 mm, anthers 13–16 mm;

style 60–72(–88) mm, stigma exserted beyond anthers at anthesis.

cylindrical, sometimes slightly enlarged toward apex, 25–50 ×2–3 mm.

somewhat curved and often somewhat twisted, lanceoloid-cylindrical, nearly cylindrical, (20–)30–47 × 7–8 mm, gradually tapering to apex, 6–8 mm, dehiscent nearly throughout their length, valve margins with a conspicuous, irregular, wavy ridge;

pedicel 1–5 mm.

broadly ellipsoid to subglobose, 0.8–1.5 × 0.5–0.9 mm.

numerous, in 2 distinct rows per locule, narrowly obovoid, 2.5–3 × 1.2–1.4 mm, embryo 7/8 of seed volume, surface finely reticulate;

seed collar with a broad membrane sealing cavity, margin entire.

= 14.

= 14.