Flora of North America species comparison

short, knotty.

erect, slightly flattened.

compressed.

basal 2–5, cauline 2–4;

auricles absent or, if present, 0.5–1.5 mm, apex acute;

blade flat, 5–15 cm × 2–3 mm.

basal and cauline;

auricles 0.5–1.5 mm, apex rounded, membranous;

basal blade flat, 20–4.5 dcm × 1.5–5 mm, cauline reduced.

glomerules, 1–6, each with 3–7 flowers, open to aggregate, 2–6 cm;

primary bract or distal leaves usually exceeding inflorescences.

glomerules, (2–)5–200, each with (1–)2–10(–20) flowers, mostly open, 3–10(–15) cm;

primary bract shorter than inflorescence.

tepals usually brown, ovate-oblong, 3–4 mm, margins scarious;

inner series slightly shorter, minutely papillate;

stamens 6, filaments 0.8–1.4 mm, anthers 0.8–1.4 mm;

style 1 mm.

tepals dark brownish, usually with green midstripe, outer series ovate-lanceolate, 1.8–3.2 mm, margins broad, clear, awned or not, apex acutish;

inner series ovate to lanceolate, 2–3.5 mm, slightly longer than outer series, apex obtuse to acute, awned or not;

stamens 3, opposite outer tepals, shorter to longer than tepals, filaments 1.1–2.5 mm, anthers 0.3–1.2 mm;

style 0.3 mm.

3-locular, narrowly ovoid, 4–5 mm.

brown and sometimes dark spotted, 3-locular, obovoid to nearly globose, 1.8–2.9 mm, shorter to longer than perianth.

narrowly ovoid, 0.3 mm, not tailed.

yellow to light brown, fusiform, 0.4–0.7 mm, not tailed.

= 38, 40.