Flora of North America species comparison

internodes 4-lined.

internodes usually 2-lined, sometimes 4-lined or not lined, with black glands scattered on and near lines or all over.

ascending to widely spreading, sessile;

blade narrowly lanceolate (linear-lanceolate on axillary branches), 10–40(–55) × 5–10(–13) mm, longer than internodes, leathery, margins plane, apex acute to acuminate, densely gland-dotted, basal vein 1, midrib with inconspicuous branches.

spreading, usually sessile, rarely petiolate (to 0.8 mm);

blade ovate-oblong to oblong or elliptic, 30–42(–52) × 8–22 mm, base subcordate to rounded, margins plane, apex usually rounded, rarely obtuse or subretuse, midrib with 4–5 pairs of branches, tertiary veins densely reticulate toward margins, black glands intramarginal (dense) and laminar (scattered).

cylindric, to 40-flowered; branching mostly dichasial, subsidiary branches usually with relatively smaller leaves.

corymbiform to broadly pyramidal, (5–)13–61(–124)-flowered, subsidiary branches narrowly ascending or curved-ascending.

8–15+ mm diam.;

sepals lanceolate, unequal (outer slightly wider than inner), 3–6(–7.5) × 1.1–1.8(–2.2) mm, margins sometimes ciliate, not setulose-ciliate, apex acute or acuminate;

petals orange-yellow, obovate, 5–10 mm;

stamens 50–80, filaments basally connate;

styles 2–4 mm;

stigmas capitate.

15–20 mm diam.;

sepals not imbricate, erect in fruit, lanceolate to ovate-elliptic or elliptic, subequal, (3–)3.6–4.6(–5.5) × 1–2 mm, apex acute to obtuse;

petals golden yellow, narrowly obovate or oblanceolate to elliptic, 6–11 mm;

stamens (37–)42–56(–62);

anther gland black;

styles 1.5–5 mm.

ovoid, 5 × 3–4 mm.

ellipsoid to subglobose, 3–7 × 3–4.5 mm, with longitudinal vittae.

0.4–0.8 mm;

testa linear-pitted.

not carinate, 0.7–0.9 mm;

testa not seen.

= 24.

= 16.