Flora of North America species comparison

internodes 4-angled.

spreading, sessile or subamplexicaul;

blade ovate or orbiculate to elliptic or oblanceolate (proximal) or oblong (distal), 3–13 × 1.5–8.5 mm, papery to membranous, margins plane, apex rounded, basal veins 3–5(–7), distally looped, midrib unbranched.

loosely corymbiform, 1–14-flowered, branching mostly dichasial.

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

3–5(–8) mm diam.;

sepals usually narrowly elliptic-oblong to oblanceolate-spatulate, rarely obovate, unequal, 2–4 × 0.9–2 mm, margins sometimes ciliate, not setulose-ciliate, apex subacute to rounded;

petals golden yellow to salmon-orange, oblanceolate, (1.7–)3.5–5 mm;

stamens (5–)12–15(–25), separate or obscurely 3-fascicled;

styles 0.5–2 mm;

stigmas scarcely capitate.

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.

ellipsoid to cylindric or subglobose, 2.5–5 × 1.7–2.5 mm.

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

0.5–0.6 mm;

testa linear-scalariform.

slightly carinate, 0.6–0.7 mm;

testa scalariform.

= 16.

= 18.