Flora of North America species comparison

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

internodes 4-lined at first, soon 4-angled, then terete, not glaucous.

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.

blades linear-subulate, 8–25 × 0.5–0.7 mm, not glaucous, base articulated, parallel or slightly expanded, margins revolute, apex acute, midrib unbranched.

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

shortly cylindric, 1–3-flowered, often with single flowers or triads from 1–2 proximal nodes.

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.

12–15 mm diam.;

sepals deciduous, not enclosing capsule, 5, linear-subulate, unequal, 5–7 × 0.5 mm, not glaucous;

petals 5, bright yellow, oblong-spatulate, 7–9 mm;

stamens deciduous, 75;

ovary 3-merous;

styles 2.5–4 mm.

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

narrowly pyramidal-ovoid, 6 × 2.4 mm.

not carinate, 0.9–1 mm;

testa linear-foveolate.

not carinate, 0.6–0.8 mm;

testa finely foveolate-reticulate.

= 18.