Sedge

The sedge has withered from the lake, and no birds sing.

Here he saw a pool of water, clear to its very depths. There were no marsh reeds round it, no sterile sedge, no spikes of rushes: it was crystal liquid. The edges of the pool were bordered by fresh turf, and the grass was always green.

It’s believed purple nut sedge may have the ability to inhibit the growth of Streptococcus mutans.

But when the moon rose and the breeze awakened, and the sedges stirred, and the cat's-paws raced across the moonlit ponds, and the far surf off Wonder Head intoned the hymn of the four winds, the trinity, earth and sky and water, became one thunderous symphony—a harmony of sound and colour silvered to a monochrome by the moon.