Flora of North America species comparison

internodes 4-angled.

spreading, sessile or amplexicaul;

blade usually ovate-triangular to broadly ovate, rarely oblong (mid and distal blades lanceolate-deltate), 5–25 × 3–12 mm, papery to membranous, margins plane, apex usually subacute, basal veins (3–)5, midrib usually with 1–2 pairs of branches.

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

laxly corymbiform to cylindric, (1–)5–65-flowered, branching mostly dichasial.

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.

4.5–7 mm diam.;

sepals lanceolate to narrowly ovate, equal, 3–5 × 0.8–1.2 mm, margins sometimes ciliate, not setulose-ciliate, apex acute to acuminate;

petals bright yellow, oblanceolate, 2–4 mm;

stamens 10–14, scarcely grouped;

styles 0.5–0.7 mm;

stigmas broadly capitate.

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

narrowly conic-ellipsoid, 3–5 × 1.5–2 mm, usually broadest at or near middle.

slightly carinate, 0.6–0.7 mm;

testa scalariform.

0.5–0.6 mm;

testa finely linear-scalariform.

= 18.

= 16.