Flora of North America species comparison

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

internodes narrowly 4-winged at first, then terete.

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 ovate-lanceolate or elliptic to linear-oblong, 30–70 × 7–25 mm, base not articulated, cuneate to subcordate, margins plane, apex obtuse to rounded, midrib with to 6 pairs of branches.

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

corymbiform to rounded-pyramidal, 7–45-flowered, narrowly branched, sometimes with 1–7(–40)-flowered dichasia from 1–3 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.

15–20 mm diam.;

sepals deciduous, not enclosing capsule, 5, oblanceolate-spatulate to narrowly triangular, unequal to subequal, 2–5 × 1–1.5 mm;

petals 5, pale or coppery yellow, oblanceolate-oblong to elliptic-oblong, 6–8(–10) × 3–4 mm, length 2–3 times sepals;

stamens persistent, 80;

ovary 3(–4)-merous, placentation incompletely axile.

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

broadly ellipsoid to ovoid-globose, 3.5–7 × 3–5 mm.

not carinate, 0.5–0.7 mm;

testa linear-reticulate.

markedly carinate, 1.5–2 mm;

testa ± scalariform-reticulate.

= 14, 16.

= 18.