Flora of North America species comparison

green with black apical band, spreading, 1–6 × 1–5 mm;

teeth 3–14, not articulate.

green, elongate, 7–15 × 3–9 mm;

teeth 10–32, articulate and usually shed early, leaving dark rim on sheath.

persisting more than a year, unbranched, 6–55 cm;

lines of stomates single;

ridges 3–12.

lasting less than a year, occasionally overwintering in the southwestern United States, usually unbranched, 20–150 cm;

lines of stomates single;

ridges 10–32.

apex pointed;

spores green, spheric.

apex rounded to apiculate with blunt tip;

spores green, spheric.

=216.

=216.