Sentence:  But when the moon rose and the breeze awakened, and the <WSD>sedges</WSD> 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&mdash;a harmony of sound and colour silvered to a monochrome by the moon. 
Meaning of the word marked with <WSD> tags:  Any plant of the genus "Carex", the (pl=s), perennial, endogenous herbs, often growing in dense tufts in marshy places. They have triangular jointless stems, a spiked inflorescence, and long grasslike leaves which are usually rough on the margins and midrib. There are several hundred species.