Flora of North America species comparison

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

branched from base, primary stem short, lateral stems decumbent, usually with leaves mostly in a tuft toward apex, 1–5(–18) cm, flowering proximally and 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.

mostly cauline, clustered toward ends of branches, 1–4.5 × 0.2–0.8 cm;

petiole 1–3 cm;

blade oblanceolate or narrowly oblanceolate, margins entire.

nodding.

erect.

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 2.2–3.5 mm, glabrous inside;

sepals 3.2–4 mm;

petals white, fading pinkish, 3–5 mm; episepalous filaments 4.5–4.8 mm, epipetalous filaments 3–4 mm, anthers 0.4–1.5 mm;

style 6–7 mm, glabrous, stigma 0.5–0.8 mm diam., exserted beyond anthers at anthesis.

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

cylindrical and thickened proximally, spreading and highly contorted, 4-angled, 8–14 × 1–2 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, 1.2–1.5 × 0.3–0.4 mm, finely reticulate.

= 14, 28.

= 14.