Spikes very large, globose 6
Spikes very small, sessile or nearly so 81–83, 85–92
Spikes cylindrical, heavy 24–28
Perigynium granular-roughened 23
Perigynium smooth,
Thin and turgid, loosely enclosing the achene.—
Beakless 58, 59
Beaked 5–17
Firm in texture, not inflated,
Long-beaked, deeply toothed 2–4, 26, 28