Flora of North America species comparison

clustered, internodes not lined, with black glands scattered all over.

internodes 4-lined.

spreading or ascending, usually sessile, rarely petiolate (to 1 mm);

blade elliptic or oblong to lanceolate or triangular-lanceolate, or oblanceolate, 14–40(–58) × 3–17(–22.5) mm, base cordate to narrowly cuneate, margins plane, apex usually rounded to retuse, rarely acute to obtuse, midrib with 3–5 pairs of branches, tertiary veins densely reticulate toward margins, black glands intramarginal (dense) and laminar (scattered).

blades oblong-ovate to triangular-lanceolate, 8–40 × (5–)7–20 mm, base articulated, subcordate-amplexicaul, margins recurved, apex rounded, midrib with 3 or 4 pairs of branches.

subcorymbiform to cylindric, 10–206(–600)-flowered, subsidiary branches narrowly ascending to curved-ascending.

hemispheric to ± flat-topped, 7–30-flowered, widely branched, with flowers or flowering branches from to 3 proximal nodes.

8–15 mm diam.;

sepals not imbricate, erect in fruit, lanceolate or oblong-lanceolate to elliptic or ovate-elliptic, subequal, (1.5–)2–4 × 0.8–1.6 mm, apex acute to rounded;

petals pale yellow, oblanceolate to elliptic, 3–6(–9) mm;

stamens (20–)30–60;

anther gland black;

styles 1–4 mm.

15–25 mm diam.;

sepals persistent, not enclosing capsule, 5, ovate to lanceolate, unequal to subequal, 5–8 × 2–4.5 mm;

petals 5, bright yellow, obovate to oblong-lanceolate, 8–15 mm;

stamens deciduous, 200;

ovary 3(–4)-merous.

ovoid to subglobose, 2.5–6 × 2–3.5(–4) mm, with longitudinal vittae or elongate to ovoid vesicles.

pyramidal-ovoid, 5–6 × 3–4 mm.

not carinate, 0.5–0.7 mm;

testa linear-reticulate.

narrowly carinate, 1 mm;

testa shallowly linear-reticulate.

= 14, 16.

= 18.