Flora of North America species comparison

internodes 4-angled.

internodes narrowly 4-winged at first, then terete.

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.

blades ovate-lanceolate or elliptic to linear-oblong, 30–70 × 7–25 mm, base not articulated, cuneate to subcordate, margins plane, apex obtuse to rounded, midrib with to 6 pairs of branches.

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

corymbiform to rounded-pyramidal, 7–45-flowered, narrowly branched, sometimes with 1–7(–40)-flowered dichasia from 1–3 proximal nodes.

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.

15–20 mm diam.;

sepals deciduous, not enclosing capsule, 5, oblanceolate-spatulate to narrowly triangular, unequal to subequal, 2–5 × 1–1.5 mm;

petals 5, pale or coppery yellow, oblanceolate-oblong to elliptic-oblong, 6–8(–10) × 3–4 mm, length 2–3 times sepals;

stamens persistent, 80;

ovary 3(–4)-merous, placentation incompletely axile.

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

broadly ellipsoid to ovoid-globose, 3.5–7 × 3–5 mm.

0.5–0.6 mm;

testa linear-scalariform.

markedly carinate, 1.5–2 mm;

testa ± scalariform-reticulate.

= 16.

= 18.