Flora of North America species comparison

densely branching.

few–20.

to 20.

basal, (1–)2–3;

auricles 2–5 mm, apex acute, membranous;

blade flat, 3–12 cm × 0.5–1 mm, margins entire.

to 2.2 cm.

5–40-flowered, borne congested or branch internodes ca. as long as tepals, ssomewhat loose, 1–5 cm;

primary bract usually longer than inflorescence.

headlike clusters, each with 1–2 flowers;

bracts subtending inflorescence 2–4, ovate, inconspicuous, 0.8–1.5 mm, membranous, apex acute.

bracteoles 2;

tepals greenish, lanceolate, 3.3–4.4 mm;

outer and inner series nearly equal;

stamens 6, filaments 0.5–0.9 mm, anthers 0.1–0.2 mm;

style 0.1–0.2 mm.

tepals 4–6, chestnut brown to black, 1.8–2.8 × 0.8–1.5 mm;

inner series usually slightly longer than outer, apex acuminate to attenuate;

stamens 2–3, filaments 0.6–1.1 mm, anthers 0.3–0.4 mm;

style 0.1–0.3 mm, stigma 0.4–0.6 mm.

tan or light brown, 1-locular to pseudo-3-locular, ellipsoid, (3.3–)3.8–4.7 × (1.1–)1.3–1.7 mm, nearly equal to tepals.

tan or apex reddish, 2– or 3-locular, globose to obovoid, 1.2–2 × 1.1–1.5 mm, usually shorter than tepals.

tan, ellipsoid to lunate, (0.52–)5.5–0.65(–0.7) mm, not tailed.

ellipsoid-ovoid, 0.5–0.8 mm.

= 18.

= 80.