Flora of North America species comparison

internodes 4-lined at first, soon 4-angled, then terete, dull silvery, glaucous.

internodes 4-lined at first, soon 2-lined, with black glands on or near lines.

blades linear-subulate to acicular, (9–)12–17 × 0.5–0.8 mm, glaucous, base articulated, parallel or almost so, margins revolute, apex obtuse to rounded, midrib unbranched.

spreading, sessile;

blade ovate to oblong or lanceolate, 33–65 × 15–27 mm, base cordate to truncate or broadly cuneate, margins plane, apex obtuse to rounded, midrib with 4–5 pairs of branches, tertiary veins densely reticulate toward margins, black glands intramarginal (dense) and, sometimes, laminar (scattered).

narrowly cylindric, 1–3-flowered, usually with paired flowers or triads from to 9 proximal nodes.

subcorymbiform, (2–)5–14(–22)-flowered, subsidiary branches sometimes narrowly ascending or curved-ascending.

20 mm diam.;

sepals deciduous, not enclosing capsule, 5, linear-subulate, subequal, 7–8 × 0.5–0.8 mm, glaucous;

petals 5, bright yellow, obovate-spatulate, 10–12 mm;

stamens deciduous, 170–220;

ovary 3-merous;

styles 5 mm.

20–25(–30) mm diam.;

sepals not imbricate, erect in fruit, lanceolate, subequal, 5–7.5(–11) × 1–3 mm, apex acute;

petals golden yellow, narrowly obovate, 11–18 mm;

stamens 50–90(–103);

anther gland black;

styles 5.6–12 mm.

narrowly ovoid to ellipsoid, 6–7 × 2.5–3.5 mm.

broadly ovoid, 5–8 × 3.5–5 mm, with longitudinal vittae.

narrowly carinate, 1–1.6 mm;

testa coarsely reticulate-sulcate.

not carinate, 0.8–1.1 mm;

testa linear-reticulate.

= 18.

= 16.