Flora of North America species comparison

internodes (4-) or 6-lined at first, then terete.

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

blades linear-subulate, 13–25 × 0.5–0.8 mm, base articulated, parallel, margins revolute, apex rounded to retuse, midrib unbranched.

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).

narrowly pyramidal, 1–3-flowered, with 1–3(–5)-flowered dichasia from to 5 proximal nodes, without additional flowering branches;

pedicels 0.5 mm.

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

12–14 mm diam.;

sepals deciduous, not enclosing capsule, 5, linear-subulate, unequal, (3–)4.5–7 × 0.5–0.8 mm;

petals 5, golden yellow, oblanceolate-oblong, 5–7.5 mm;

stamens deciduous, 100;

ovary 3-merous.

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, 3–4 × 2–2.5 mm.

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

carinate, 0.7 mm;

testa not seen.

not carinate, 0.7–0.9 mm;

testa not seen.

= 16.