Flora of North America species comparison

internodes 4-angled.

deciduous (base articulated) or persistent (base not articulated).

erect or spreading, sessile or subsessile;

blade linear to oblanceolate-linear or (proximal) oblanceolate to obovate, 6–55 × 0.5–5.5 mm, papery to membranous, margins plane, apex rounded, basal or near-basal veins 1–3(–5), midrib with 1–4 pairs of branches.

corymbiform to cylindric, usually diffuse, 1–35-flowered, branching mostly dichasial.

3–15 mm diam.;

sepals persistent, (4–)5;

petals persistent, (4–)5;

stamens persistent, (5–)10–80, usually in continuous or interrupted ring, sometimes in 5 barely discernable fascicles, each of 1–2 stamens;

ovary (2–)3(–4)-merous;

placentation parietal;

styles ± spreading, bases distinct;

stigmas capitate or clavate.

5–6 mm diam.;

sepals linear-lanceolate to lanceolate, equal, 2.5–4.5 × 0.8–1 mm, margins sometimes ciliate, not setulose-ciliate, apex acute to acuminate;

petals golden yellow, sometimes red-veined, narrowly obovate to elliptic, 2.5–4 mm;

stamens 12–25, obscurely 3–5-fascicled;

styles 0.5–0.8 mm;

stigmas broadly capitate.

narrowly conic to conic-cylindric, 4–6 × 1.5–3 mm, broadest proximal to middle.

not carinate.

0.5–0.7 mm;

testa finely linear-scalariform.

= 16.