Flora of North America species comparison

internodes 2–4-lined.

internodes 4-lined at first, eventually 2-lined.

blades narrowly elliptic or narrowly oblong to linear, 30–70 × 3–15 mm, base not articulated, narrowly cuneate to linear, margins plane to revolute, apex subacute to rounded, midrib with 0–4 pairs of branches.

blades narrowly oblong or oblanceolate to linear, 5–15 × 1–3 mm, base not articulated, rounded to cuneate, margins recurved to subrevolute, apex rounded to obtuse, midrib with 1–3 pairs of branches.

rounded-corymbiform, 7–70-flowered, narrowly branched, sometimes with dichasia or branches from to 8 proximal nodes.

rounded-pyramidal, 1–3-flowered, narrowly branched, sometimes with 1–3-flowered dichasia or branches from to 4 proximal nodes.

10–15 mm diam.;

sepals persistent, not enclosing capsule, 5, broadly ovate to oblong-elliptic, ± unequal, 2.5–5 × 1.5–3 mm;

petals 5, bright yellow, oblanceolate-elliptic to elliptic, 5–9 mm;

stamens persistent, 45–85;

ovary 3-merous, placentation parietal.

15–25 mm diam.;

sepals persistent, not enclosing capsule, (3–)4(–5), oblong or elliptic-oblong to linear, subequal or equal, 3–5 × 1–1.4 mm;

petals (3–)4(–5), bright yellow, obovate (larger pair) to obovate-oblong (smaller pair), 10–12 mm;

stamens persistent, 60–70;

ovary 3-merous, placentation parietal.

broadly ovoid to depressed-globose, 4.5–8 × 4–7 mm.

cylindric-ellipsoid to narrowly ovoid-conic, 6–8 × 2.5 mm.

carinate, 2–2.7 mm;

testa coarsely reticulate.

not carinate, 0.9–1 mm;

testa linear-foveolate.

= 18.