Flora of North America species comparison

densely branching.

3–7 mm diam., nodes not swollen.

few–20.

erect, terete, 2–4 mm diam.

2–3, straw-colored, apex rounded.

basal, (1–)2–3;

auricles 2–5 mm, apex acute, membranous;

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

basal 0, cauline 1;

auricles 0.5–1.5 mm, apex blunt, cartilaginous;

blade 25–35 cm × 1–2 mm.

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

primary bract usually longer than inflorescence.

terminal panicles of 24–60 heads, 5–10 cm, branches spreading;

primary bract erect;

heads 15–50-flowered, spheric, 4.5–6 mm diam.

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 light brown, lanceolate to oblong, 2–2.5 mm, nearly equal;

stamens 6, anthers longer than filament.

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.

included with beak slightly exserted, chestnut brown, 3-locular, ovoid, 2.5 mm, apex acute proximal to beak, valves separating at dehiscence, fertile throughout or only proximal to middle.

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

not seen.

= 80.