Flora of North America species comparison

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

blades linear-elliptic or linear-oblong to linear, 20–35 × 3–5 mm (main stem), base not articulated, narrowly cuneate to rounded, margins recurved to revolute, apex obtuse to acute, midrib unbranched.

rounded-corymbiform, 13–60-flowered, narrowly branched, without subsidiary branches.

obconic, (1–)3–20-flowered, ± widely branched, sometimes with single flowers at immediately proximal nodes.

10–15 mm diam.;

sepals persistent, not enclosing capsule, 5, ovate-lanceolate to lanceolate, subequal, (2–)4–7 × 1–1.5 mm;

petals 5, bright yellow, obovate-oblanceolate, 6–8 mm;

stamens persistent, 60–80;

ovary 3-merous, placentation parietal.

15–20 mm diam.;

sepals persistent, not enclosing capsule, 5, ovate-lanceolate to lanceolate, ± foliaceous, unequal, 5–8(–15) × 2–3(–8)mm;

petals 5, yellow, curved-dolabriform, 10–13 mm;

stamens deciduous, 120–200;

ovary 3-merous.

ellipsoid to ovoid-ellipsoid, 3.5–6 × 2–4 mm.

ovoid-conic, rostrate, 4–9 × 3–4 mm.

slightly carinate, 0.6–0.7 mm;

testa scalariform.

carinate, 1.5–1.8 mm;

testa reticulate-scalariform.

= 18.

= 18.