Common Name: nutsedge, yellow
Species: Cyperus esculentus L.
Bayer Code: CYPES

Yellow nutsedge is a native of North America and is found throughout the United States and is one of the more cold-tolerant sedge species. Yellow nutsedge is a rapidly spreading perennial that forms brown- to tan-colored tubers at the tips of rhizomes. It gets its name from the yellowish-brown or straw-colored seedhead. This weed can be a severe problem in both warm- and cool-season turf species. There are several ways that purple and yellow nutsedge can be distinguished. 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. Although this weed can be difficult to control, it is much easier to control than other sedge species, so proper identification is important.
yellow nutsedge seedheads
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yellow nutsedge seedhead
yellow nutsedge
yellow nutsedge seedhead
yellow nutsedge seedhead
Growth Season perennial weed 
Seed Arrangement on Spikes looseseedhead a distinct yellow when compared to purple nutsedge's purple hue
Seedhead Spikelet Shape flattened 
Tuber Type tantan tubers have little taste - might be slightly sweet