Flora of North America species comparison

internodes 4-angled.

internodes 6-lined at first, soon 4-lined, then terete.

spreading, sessile or amplexicaul;

blade usually ovate-triangular to broadly ovate, rarely oblong (mid and distal blades lanceolate-deltate), 5–25 × 3–12 mm, papery to membranous, margins plane, apex usually subacute, basal veins (3–)5, midrib usually with 1–2 pairs of branches.

blades narrowly oblong-elliptic or oblanceolate to linear, 15–32(–37) × 1–7 mm, base articulated, attenuate, margins recurved to revolute, apex rounded to acute, midrib obscurely branched.

laxly corymbiform to cylindric, (1–)5–65-flowered, branching mostly dichasial.

narrowly cylindric, 3–15-flowered from apical node, with (1–)3–5-flowered dichasia from 3–4 proximal nodes, sometimes with additional flowering branches.

4.5–7 mm diam.;

sepals lanceolate to narrowly ovate, equal, 3–5 × 0.8–1.2 mm, margins sometimes ciliate, not setulose-ciliate, apex acute to acuminate;

petals bright yellow, oblanceolate, 2–4 mm;

stamens 10–14, scarcely grouped;

styles 0.5–0.7 mm;

stigmas broadly capitate.

9–14 mm diam.;

sepals deciduous, not enclosing capsule, 5, oblanceolate-spatulate to linear, subequal or equal, 3.5–6.5 × 0.5–1.5 mm;

petals 5, bright yellow, obovate-oblanceolate, 5–9 mm;

stamens deciduous, 60–120;

ovary 3-merous, placentation parietal.

narrowly conic-ellipsoid, 3–5 × 1.5–2 mm, usually broadest at or near middle.

narrowly ovoid-conic, 4.5–6 × 2.5–3.5 mm.

0.5–0.6 mm;

testa finely linear-scalariform.

narrowly carinate, 0.7–0.8 mm;

testa finely reticulate.

= 16.

= 18.