Flora of North America species comparison

mostly 2–10;

branches proximal and distal (distal opposite or, sometimes, appearing alternate when unequal), rarely none.

mostly 1;

branches proximal or none.

largest 7–15 × 2–4 mm;

capitular leaves subtending glomerules, also visible between and surpassing heads.

largest 10–18 × 2–3 mm;

capitular leaves subtending glomerules only, or sometimes also hidden between and surpassed by heads.

broadly or narrowly conic, 0.4–0.6 mm or ± 0.9–1.1 mm, heights 0.5–0.7 or 2–2.4 times diams.

± spheric, 0.3–0.5 mm, heights ± equal to diams.

0.

3–5;

corollas protruding from heads, ± zygomorphic, 0.5–0.9 mm, glabrous, lobes unequal (1–2 enlarged).

in strictly dichasiform or pseudo-polytomous arrays (sometimes appearing monochasiiform), cylindric to ± ellipsoid, 3.5–4.5 mm, heights 2–3 times diams.

proximal and distal, in spiciform or racemiform arrays, ± spheric, 1.5–2 mm, heights ± equal to diams.

± angular, obcompressed, mostly 0.9–1.2 mm.

rounded, ± terete, mostly 0.5–0.6 mm (bisexual slightly longer).

paleae imbricate, longest 2.5–4 mm.

paleae scarcely imbricate, longest 0.9–1.3 mm.

paleae ± 3, apices erect to somewhat spreading, ± plane.

staminate florets 2–4;

ovaries partly developed, 0.4–0.6 mm;

corollas hidden in heads, actinomorphic, 1.4–2 mm, glabrous, lobes equal.

staminate florets usually 0.

paleae mostly 1–3, apices incurved, ± involute, gibbous.

= 14.