Flora of North America species comparison

erect or decumbent, slender, wiry, usually well-branched, 5–25(–50) cm.

usually erect, sometimes decumbent, slender, wiry, usually many-branched, to 50 cm.

proximalmost not clustered near base;

blade linear to narrowly elliptic or narrowly oblanceolate, 0.5–2.5(–3) × 0.1–0.15(–0.5) cm, base attenuate, margins sparsely serrulate to coarsely serrate, apex acuminate.

proximalmost not clustered near base;

blade linear to very narrowly elliptic, 0.8–3.5 × 0.1–0.3 cm, base cuneate or attenuate, margins sparsely serrulate, apex acute.

opening near sunrise;

floral tube 1.5–5.5 mm, ± densely villous on proximal 1/2 inside;

sepals 3.5–8(–12) mm, reflexed in pairs;

petals (3.5–)5–15.5 mm, each usually with 1 or 2 red dots basally; episepalous filaments (1.4–)2.1–5.5 mm, epipetalous filaments (0.7–)1.2–3.2 mm, anthers 1–2.4 mm, pollen with less than 5% of grains 4- or 5-pored;

style (3.2–)4–12(–15) mm, stigma well exserted beyond anthers at anthesis.

opening near sunrise;

floral tube 1.6–2.7 mm, usually moderately to very sparsely pubescent inside on proximal 1/2, rarely glabrous;

sepals (3–)3.8–5.5 mm, reflexed in pairs;

petals (4–)4.5–7 mm, each with 2 red dots basally; episepalous filaments 2.5–3.5 mm, epipetalous filaments 1.7–2.5 mm, anthers 0.8–1.3 mm, pollen with usually less than 10% of grains 4-pored;

style (3.5–)4–7 mm, stigma surrounded by anthers at anthesis.

20–43 × 0.7–1.5(–2) mm;

subsessile.

15–45 × 0.8–1.3 mm;

subsessile.

0.8–1.6 × 0.4–0.6 mm.

0.6–0.8 × 0.3–0.4 mm.

= 28.