Flora of North America species comparison

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

internodes 4-angled.

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).

erect or spreading, sessile or subsessile;

blade linear to oblanceolate-linear or (proximal) oblanceolate to obovate, 6–55 × 0.5–5.5 mm, papery to membranous, margins plane, apex rounded, basal or near-basal veins 1–3(–5), midrib with 1–4 pairs of branches.

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

corymbiform to cylindric, usually diffuse, 1–35-flowered, branching mostly dichasial.

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.

5–6 mm diam.;

sepals linear-lanceolate to lanceolate, equal, 2.5–4.5 × 0.8–1 mm, margins sometimes ciliate, not setulose-ciliate, apex acute to acuminate;

petals golden yellow, sometimes red-veined, narrowly obovate to elliptic, 2.5–4 mm;

stamens 12–25, obscurely 3–5-fascicled;

styles 0.5–0.8 mm;

stigmas broadly capitate.

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

narrowly conic to conic-cylindric, 4–6 × 1.5–3 mm, broadest proximal to middle.

not carinate, 0.5–0.7 mm;

testa linear-reticulate.

0.5–0.7 mm;

testa finely linear-scalariform.

= 14, 16.

= 16.