Flora of North America species comparison

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

usually well branched at base and distally, 3–65 cm, usually flowering only distally.

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.

cauline, sometimes with lower ones clustered near base, these often withered by flowering, 1–11(–13) × 0.2–2.2(–3) cm;

petiole 0–6 cm;

blade very narrowly elliptic to narrowly ovate, lanceolate, or oblanceolate, margins denticulate, serrulate, sinuate-toothed, or subentire.

nodding.

nodding.

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.

opening at sunset;

floral tube (2–)3–8 mm, villous in proximal 1/2 inside;

sepals (2.7–)4–8 mm;

petals usually white fading pink, rarely red and fading red, (3–)3.5–9 mm; episepalous filaments (1.5–)2–5.8 mm, epipetalous filaments slightly shorter, anthers (1–)1.8–2.3 mm;

style (6.5–)8.2–13.5(–15) mm, villous near base, stigma 1.2–2 mm diam., exserted beyond anthers at anthesis.

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

cylindrical and thickened proximally, spreading to curved downward, contorted to straight, terete or 4-angled, 8–35 × 0.9–3.8 mm, held on dried plants and regularly but tardily dehiscent.

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

usually dimorphic, rarely monomorphic, those with relatively smooth surfaces light brown, 1.4–2.1 × 0.5–0.7 mm, those of lower portion dark brown, 1.4–2.1 × 0.6–0.9 mm, coarsely papillose.

= 14.

= 14.