Flora of North America species comparison

usually well branched from base, 3–30 cm, usually flowering proximally and distally.

usually well branched from base and distally, 6–45 cm, flowering only distally.

cauline, mostly clustered near base, reduced distally, 0.5–2.5 × 0.3–1.5 cm;

petiole 0.5–2 cm;

blade oblanceolate or narrowly oblanceolate, margins entire or sparsely denticulate.

cauline, with lower ones clustered near base and these often withered by flowering, 2–6(–8) × 0.1–0.8 cm;

petiole 0–2 cm;

blade narrowly lanceolate to narrowly elliptic-lanceolate or narrowly oblanceolate, those distally on stems usually linear to linear-lanceolate, margins usually sparsely and weakly denticulate, sometimes sinuate-toothed.

erect.

nodding.

opening at sunset;

floral tube 0.5–1.9 mm, strigillose in proximal 1/2 inside;

sepals 0.8–1.8 mm;

petals white, fading pinkish, 0.8–1.3 mm;

filaments 0.3–1.3 mm, epipetalous filaments shorter than episepalous, sometimes apparently abortive, anthers 0.5–0.8 mm;

style 1.2–3.2 mm, sparsely short-villous near base, stigma 0.5–0.6 mm diam., surrounded by anthers at anthesis.

opening at sunset;

floral tube 4–7 mm, villous in proximal 1/2 inside;

sepals 4–6 mm;

petals white, fading pinkish, 3.5–10 mm; episepalous filaments 2–4.5 mm, epipetalous filaments slightly shorter, anthers 1.5–2.5 mm;

style 9–13 mm, villous proximally, stigma 1–1.5 mm diam., exserted beyond anthers at anthesis.

cylindrical and thickened proximally, spreading, contorted, subterete, 10–25 × 0.8–1.2 mm, regularly but tardily dehiscent.

narrowly cylindrical throughout, spreading or reflexed, straight to ± contorted, terete, 20–50 × 0.7–1 mm, regularly but tardily dehiscent.

monomorphic, gray, 1.1–1.2 × 0.4 mm, finely reticulate.

monomorphic, gray, 0.9–1.5 × 0.4–0.5 mm, finely reticulate.

= 14.

= 14.