Flora of North America species comparison

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

internodes (at least some) 4-lined, without black glands.

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.

spreading, sessile or petiolate (to 0.5 mm);

blade narrowly elliptic or narrowly oblong to linear, usually conduplicate, sometimes falcate, 13–22 × 1.5–8 mm, base cuneate, margins plane, apex acute to subacute, midrib with 2–4 pairs of branches, black glands marginal.

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

subcapitate to cylindric, 1–7-flowered.

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.

20–35 mm diam.;

sepals markedly imbricate, spreading in fruit, broadly to narrowly ovate, unequal, 6–9 × 2–3 mm, apex acute to acuminate;

petals yellow, obovate or oblong-obovate, (10–)12–15 mm;

stamens 40–80(–100);

anther gland amber;

styles 6–9 mm.

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

ovoid, 6–9 × 4–4.5 mm, with longitudinal vittae.

narrowly carinate, 0.7–0.8 mm;

testa finely reticulate.

not carinate, 1 mm;

testa minutely and shallowly pitted.

= 18.

= 16.