Flora of North America species comparison

long- creeping.

with swollen nodes, 1 mm diam.

erect, terete, 1–3 mm diam., smooth.

1–3.

0 or 1–2., pink to gray, apex acute.

basal, (1–)2–4;

auricles 0.4–0.6(–0.8) mm, scarious;

blade flat or somewhat channeled, 10–40 cm × 0.4–0.7 mm, margins entire.

basal 1, cauline 2–4, green to pink;

auricles 0.5–1.7 mm, apex rounded, membranaceous to cartilaginous;

blade terete, 6–30 cm × 0.5–1.5 mm.

10–30(–80)-flowered, usually loose and somewhat lax, 2–16 cm;

primary bract rarely surpassing inflorescence.

terminal racemes of 3–15 heads, 0.6–6 cm, branches ascending to erect;

primary bract erect;

heads 6–30-flowered, spheric, 6–10(–12) mm diam.

bracteoles 2;

tepals dark brown or blackish, lanceolate-ovate to oblong, 2.6–3.2(–3.8) mm;

inner and outer series nearly equal, apex obtuse;

stamens 6, filaments 0.4–0.7 mm, anthers 1.1–1.6(–1.8) mm;

style 0.4 mm.

tepals green to light brown, lance-subulate, 2.4–4.1 mm, nearly equal, apex acuminate;

stamens 3 or 6, anthers 1/2 to equal filament length.

chestnut brown or brown, 3-locular, widely ellipsoid, (2.2–)2.5–3.2(–3.5) × 1.3–1.9 mm.

exserted, chestnut brown, 1-locular, lance-subulate, 3.2–5 mm, apex tapering, valves separating at dehiscence, fertile throughout or only proximal to middle.

dark brown, ellipsoid to lunate, 0.485–0.6(–0.67) mm, not tailed.

oblong, ellipsoid, or obovoid, 0.4–0.5 mm, not tailed.

= ca. 80, 84.

= 40.