Flora of North America species comparison

internodes 2–4-lined.

internodes 4-lined at first, soon 2-winged.

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 elliptic or oblong-linear to narrowly obovate or oblanceolate, 3–10 × 1–3 mm, base not articulated, rounded to cuneate, without glandlike auricles, margins plane to subrecurved, apex obtuse, midrib unbranched.

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

1-flowered, often with pseudodichotomous branches from apical node, without proximal branches;

pedicels mostly recurved to reflexed in fruit, bracteoles proximal.

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.

10–15 mm diam.;

sepals persistent, enclosing capsule, (2 or) 4, unequal, outer broadly ovate to broadly elliptic, 4–8 × 4–8 mm, apex obtuse to rounded, inner none or minute;

petals 4, pale yellow, narrowly obovate, often unequal, 4–8 mm;

stamens persistent, 30;

ovary 2-merous.

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

cylindric-ellipsoid, 3–5 × 2–3 mm.

carinate, 2–2.7 mm;

testa coarsely reticulate.

scarcely carinate, 1 mm;

testa finely reticulate.

= 18.