Flora of North America species comparison

internodes 6-lined at first, soon 2-winged, then terete, not glaucous.

internodes 4-lined at first, eventually 2-lined.

blades linear-subulate, 8–20 × 0.7–1 mm, not glaucous, base articulated, parallel, margins revolute, apex sometimes slightly broadened, midrib unbranched.

blades narrowly oblong or oblanceolate to linear, 5–15 × 1–3 mm, base not articulated, rounded to cuneate, margins recurved to subrevolute, apex rounded to obtuse, midrib with 1–3 pairs of branches.

rounded-pyramidal to corymbiform, sometimes intercalary as result of resumed vegetative growth, (3–)7–32-flowered, sometimes with single flowers or 3–5-flowered dichasia from to 3 proximal nodes.

rounded-pyramidal, 1–3-flowered, narrowly branched, sometimes with 1–3-flowered dichasia or branches from to 4 proximal nodes.

13–16 mm diam.;

sepals deciduous, not enclosing capsule, 5, linear-subulate, unequal, (3–)4.5–8(–10) × 0.5 mm, not glaucous;

petals 5, bright yellow, obovate-spatulate, 6–9 mm;

stamens deciduous, 70–100;

ovary 3-merous;

styles 2.5–4 mm.

15–25 mm diam.;

sepals persistent, not enclosing capsule, (3–)4(–5), oblong or elliptic-oblong to linear, subequal or equal, 3–5 × 1–1.4 mm;

petals (3–)4(–5), bright yellow, obovate (larger pair) to obovate-oblong (smaller pair), 10–12 mm;

stamens persistent, 60–70;

ovary 3-merous, placentation parietal.

± narrowly ovoid-conic to ovoid-ellipsoid, 5.5 × 2.5–3 mm.

cylindric-ellipsoid to narrowly ovoid-conic, 6–8 × 2.5 mm.

not carinate, 0.4 mm;

testa finely foveolate-reticulate.

not carinate, 0.9–1 mm;

testa linear-foveolate.

= 18.

= 18.