Flora of North America species comparison

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

(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.

1–3 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.

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.

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.