Flora of North America species comparison

3–25 cm × 0.2–0.3 mm.

1–25 cm × 0.2–0.3 mm.

sheaths usually reddish proximally;

distal blade rudimentary to 6 cm × 0.2–0.5 mm.

sheaths green to stramineous or brown;

distal blade mostly much longer than sheath, to 5 cm × 0.2–0.5 mm.

involucral bracts 1 or 2;

proximal bract erect to spreading, 3–10(–20) mm;

distal bract reflexed, to 5 mm.

involucral bract 1, 5–25(–33) mm.

3–6 × 2 mm;

scales partly orange- to red- or blackish brown, midrib greenish to stramineous, not gibbous, prominently ribbed near midrib, often with 1+ pale veins on dark sides, 1.2–1.6 × 0.6–1 mm, membranous, hyaline, apex rounded to obtuse, mucro to 0.1 mm;

proximal scale like others.

1–10 × 1.5–2 mm;

scales stramineous to pale orangish, midrib region often greenish, markedly gibbous, prominently to obscurely veined, midrib keeled, finely reticulate at 20X, membranous, hyaline, apex rounded, awned;

proximal scale to 2.5(–5) mm, awn to 2 mm;

other scales 1.8–2 × 1–1.2 mm, awn 0.2–0.5 mm.

anthers 0.3–0.5 mm;

styles 3-fid or 3-fid and 2-fid.

anthers 0.2 mm;

styles 3-fid.

falling separately from floral scales, orange-brown, each face prominently longitudinally 5–8-ribbed, many fine transverse ridges evident at 20–30X, broadly obovoid to oblong, thickly biconvex to compressed-trigonous, abaxial angle obscure, lateral angles prominent, faces convex, 0.8–1 × 0.5 mm.

often falling with and clasped by floral scales, dark orange-brown or often whitish, broadly ellipsoid to obovoid or outline subcircular, nearly equilaterally trigonous, faces concave, 1–1.5 × 0.7–1 mm, papillose at 10–15X, papillae in many vertical rows, often obscured by thin, minutely reticulate, whitish surface layer.

= 28.