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-winged.

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.

blades elliptic or oblong-linear to narrowly obovate or oblanceolate, 3–10 × 1–3 mm, base not articulated, rounded to cuneate, without glandlike auricles, margins plane to subrecurved, apex obtuse, midrib unbranched.

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

1-flowered, often with pseudodichotomous branches from apical node, without proximal branches;

pedicels mostly recurved to reflexed in fruit, bracteoles proximal.

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.

10–15 mm diam.;

sepals persistent, enclosing capsule, (2 or) 4, unequal, outer broadly ovate to broadly elliptic, 4–8 × 4–8 mm, apex obtuse to rounded, inner none or minute;

petals 4, pale yellow, narrowly obovate, often unequal, 4–8 mm;

stamens persistent, 30;

ovary 2-merous.

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

cylindric-ellipsoid, 3–5 × 2–3 mm.

narrowly carinate, 1–1.6 mm;

testa coarsely reticulate-sulcate.

scarcely carinate, 1 mm;

testa finely reticulate.

= 18.

= 18.