Flora of North America species comparison

internodes 4-lined at first, then terete.

blades narrowly oblong or narrowly elliptic-oblong to triangular-lanceolate, 15–40 × 2–10 mm, base not articulated, cuneate to subcordate, margins recurved, apex subacute to rounded, midrib with 1 pair of branches.

corymbiform to cylindric, (7–)15–65-flowered, narrowly branched, sometimes with 3–65-flowered dichasia from 1–2 proximal nodes and relatively short, flowering branches from further 1–4 nodes.

rounded-corymbiform, 13–60-flowered, narrowly branched, without subsidiary branches.

7–12 mm diam.;

sepals persistent, not enclosing capsule, 5, obovate or broadly elliptic to oblong, unequal, 2–4 × 1–1.7 mm;

petals 5, bright yellow, oblanceolate, 5–8 mm;

stamens (some or all) persistent, 30–50;

ovary 3-merous, placentation parietal.

10–15 mm diam.;

sepals persistent, not enclosing capsule, 5, ovate-lanceolate to lanceolate, subequal, (2–)4–7 × 1–1.5 mm;

petals 5, bright yellow, obovate-oblanceolate, 6–8 mm;

stamens persistent, 60–80;

ovary 3-merous, placentation parietal.

ovoid-cylindric to broadly ovoid, 4–6 × 3–4 mm.

ellipsoid to ovoid-ellipsoid, 3.5–6 × 2–4 mm.

not carinate, 0.6 mm;

testa reticulate to linear-foveolate.

slightly carinate, 0.6–0.7 mm;

testa scalariform.

= 18.

= 18.