Flora of North America species comparison

green proximally, black distally, elliptic in face view, 1–2.5 × 0.75–1.5 mm;

teeth 3, dark with white margins, not articulate to sheath.

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, tortuous, 2.5–28 cm;

lines of stomates single;

ridges 6.

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.