Flora of North America species comparison

simple or loosely branched, (4–)12–35 cm, usually flowering only distally.

usually well branched from base, 8–50 cm, flowering only distally.

cauline, sometimes with lower ones clustered near base,1.5–6.5 × 0.5–2 cm;

petiole 0–3.5 cm;

blade lanceolate to ovate or elliptic to subrhombic, margins crenate-dentate or serrulate.

cauline, with lower ones clustered near base, (0.7–)2–8(–10) × 0.1–2.5 cm;

petiole 0.1–3.5 cm;

blade very narrowly elliptic to narrowly elliptic, margins entire or sparsely denticulate.

nodding.

nodding.

opening at sunset;

floral tube 1.7–2.2(–4) mm, villous in proximal 1/2 inside;

sepals 1.7–2.6 mm;

petals white, fading pinkish, 1.5–2.5 mm; episepalous filaments 1–2.2 mm, epipetalous filaments slightly shorter, anthers 0.4–0.9 mm;

style 3.2–4 mm, villous near base, stigma 0.5–0.8 mm diam., surrounded by anthers at anthesis.

opening at sunset;

floral tube 1.5–3 mm, villous in proximal 1/2 inside;

sepals 1.5–2.5 mm;

petals white, fading pinkish, 1.8–3 mm; episepalous filaments 0.7–1.5 mm, epipetalous filaments slightly shorter, anthers 0.5–1.1 mm;

style 2.3–4.5 mm, villous proximally, stigma 0.7–1 mm diam., surrounded by anthers at anthesis.

cylindrical and thickened proximally, spreading, straight to arcuate or loosely sigmoid, terete, 8–20 × 2–3 mm, regularly but tardily dehiscent.

narrowly cylindrical throughout, spreading, straight, terete, 35–60 × 0.7–1 mm, regularly but tardily dehiscent.

dimorphic, light brown, ca. 1 mm, those at base of capsule coarsely papillose, those of upper portion finely reticulate.

monomorphic, gray, 0.9–1 × 0.3–0.4 mm, finely reticulate.

= 14, 28.

= 14.