Flora of North America species comparison

internodes 4-lined at first, then terete.

internodes 4-lined at first, then 2-lined to terete.

blades narrowly oblong or narrowly elliptic-oblong to triangular-lanceolate, 15–40 × 2–10 mm, base not articulated, cuneate to subcordate, margins recurved, apex subacute to rounded, midrib with 1 pair of branches.

blades narrowly oblong to narrowly elliptic-oblanceolate, 30–70 × 6–15 mm, base articulated, attenuate to narrowly cuneate, margins plane to recurved, apex rounded-apiculate to acute, midrib with 10–16 pairs of branches.

corymbiform to cylindric, (7–)15–65-flowered, narrowly branched, sometimes with 3–65-flowered dichasia from 1–2 proximal nodes and relatively short, flowering branches from further 1–4 nodes.

cylindric, (1–)3–7(–9)-flowered from apical node, with paired single flowers or triads or 1–3(–7)-flowered branches from 2+ proximal nodes.

7–12 mm diam.;

sepals persistent, not enclosing capsule, 5, obovate or broadly elliptic to oblong, unequal, 2–4 × 1–1.7 mm;

petals 5, bright yellow, oblanceolate, 5–8 mm;

stamens (some or all) persistent, 30–50;

ovary 3-merous, placentation parietal.

15–30 mm diam.;

sepals deciduous, not enclosing capsule, 5, elliptic to obovate or oblanceolate-spatulate, unequal or subequal, 4–8 × 1.5–4 mm;

petals 5, golden yellow, obovate to oblanceolate-spatulate, 7–15 mm;

stamens deciduous, 150–500;

ovary 3(–5)-merous, placentation incompletely axile.

ovoid-cylindric to broadly ovoid, 4–6 × 3–4 mm.

usually narrowly ovoid-conic to ovoid, rarely ellipsoid, 7–13 × 4–7 mm.

not carinate, 0.6 mm;

testa reticulate to linear-foveolate.

carinate, 1.5–2 mm;

testa linear-reticulate.

= 18.

= 18.