Flora of North America species comparison

internodes 2–4-lined.

internodes narrowly 4-winged at first, then 2-lined.

blades narrowly elliptic or narrowly oblong to linear, 30–70 × 3–15 mm, base not articulated, narrowly cuneate to linear, margins plane to revolute, apex subacute to rounded, midrib with 0–4 pairs of branches.

blades oblong to elliptic-oblong, 20–40 × 12–20 mm, base not articulated, broadly cuneate, margins usually plane, rarely recurved, apex rounded to retuse, midrib with 6 pairs of branches.

rounded-corymbiform, 7–70-flowered, narrowly branched, sometimes with dichasia or branches from to 8 proximal nodes.

terminal (1–)3–5(–8)-flowered, narrowly branched.

10–15 mm diam.;

sepals persistent, not enclosing capsule, 5, broadly ovate to oblong-elliptic, ± unequal, 2.5–5 × 1.5–3 mm;

petals 5, bright yellow, oblanceolate-elliptic to elliptic, 5–9 mm;

stamens persistent, 45–85;

ovary 3-merous, placentation parietal.

15 mm diam.;

sepals tardily deciduous, not enclosing capsule, 5, spatulate to elliptic or ovate, unequal, 3–5 × 1.5–2.3 mm;

petals 5, coppery yellow, oblong, 8–10 mm length 2 times sepals;

stamens deciduous, 60–80;

ovary 3-merous, placentation incompletely axile.

broadly ovoid to depressed-globose, 4.5–8 × 4–7 mm.

cylindric-conic, 6–15 × 4.5–8 mm.

carinate, 2–2.7 mm;

testa coarsely reticulate.

scarcely carinate, 1.8–2 mm;

testa finely scalariform-reticulate.