Common Name: nutsedge, purple
Species: Cyperus rotundus L.
Bayer Code: CYPRO

Purple nutsedge is a native of India and is widely distributed in temperate and tropical regions of the world and is not as cold tolerant as yellow nutsedge. This weed tends to be more of a problem in warm-season turf. As with yellow nutsedge, purple nutsedge is a perennial that produces tubers on rhizomes. However, there are several ways the species can be distinguished from each other. Purple nutsedge produces tubers in chains connected by rhizomes, whereas yellow nutsedge only produces tubers at the tips of rhizomes. Purple nutsedge tends to have darker green leaves and produces a characteristic reddish-purple seedhead. The leaf tips of purple nutsedge tend to be blunter than those of yellow. This species is much more difficult to control than yellow nutsedge, so proper identification is important.
purple nutsedge seedhead
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purple nutsedge
purple (L) and yellow (R) nutsedge seedheads
purple nutsedge (L), yellow nutsedge (R) seedhead comparison
yellow (L) and purple (R) nutsedge seedheads
Growth Season perennial weed 
Seed Arrangement on Spikes looseseedhead a distinct purple color when compared to yellow nutsedge's yellow seedhead
Seedhead Spikelet Shape flattened 
Tuber Type blackblack tubers have a bitter (pepper) flavor