Flora of North America species comparison

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

internodes 2–4-lined.

blades oblong-ovate to ovate or triangular-ovate, 5–35 × 4–15 mm, base articulated, cordate-amplexicaul, margins subrecurved, apex apiculate or obtuse to rounded, midrib with 1 pair of branches.

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.

terminal, 1(–3)-flowered, branching from apical node pseudodichotomous, sometimes with relatively short branches from to 3 proximal nodes.

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

20–30 mm diam.;

sepals persistent, enclosing capsule, 4, unequal, outer broadly ovate, 7–15 × 5.5–10 mm, apex subapiculate to obtuse, inner narrowly lanceolate, 7–15 × 2–3 mm, apex acute;

petals 4, bright yellow, obovate-oblong, 10–15 mm;

stamens persistent, 100;

ovary 3-merous.

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.

broadly ellipsoid-ovoid to subglobose, 5–6 × 3.5–4 mm.

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

not carinate, 0.7 mm;

testa shallowly scalariform.

carinate, 2–2.7 mm;

testa coarsely reticulate.

= 18.