Flora of North America species comparison

internodes 4-lined.

blades oblong-ovate to triangular-lanceolate, 8–40 × (5–)7–20 mm, base articulated, subcordate-amplexicaul, margins recurved, apex rounded, midrib with 3 or 4 pairs of branches.

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

hemispheric to ± flat-topped, 7–30-flowered, widely branched, with flowers or flowering branches from to 3 proximal nodes.

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.

15–25 mm diam.;

sepals persistent, not enclosing capsule, 5, ovate to lanceolate, unequal to subequal, 5–8 × 2–4.5 mm;

petals 5, bright yellow, obovate to oblong-lanceolate, 8–15 mm;

stamens deciduous, 200;

ovary 3(–4)-merous.

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

pyramidal-ovoid, 5–6 × 3–4 mm.

slightly carinate, 0.6–0.7 mm;

testa scalariform.

narrowly carinate, 1 mm;

testa shallowly linear-reticulate.

= 18.

= 18.