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.

squarish in face view, ca. 4–10 × 4–10 mm;

teeth black, occasionally with narrow white border, 12–24, narrow, 2–3 mm.

persisting more than a year, unbranched, tortuous, 2.5–28 cm;

lines of stomates single;

ridges 6.

monomorphic, green, unbranched or branched, 35–115 cm;

hollow center large, to 9/10 stem diam.;

vallecular canals absent.

when present only from midstem nodes, spreading, hollow, ridges 4–6, valleys rounded; 1st internode of each branch shorter than subtending stem sheath;

sheath teeth narrow.

apex pointed;

spores green, spheric.

=216.

=216.