Common Name: burrweed, lawn (spurweed)
Species: Soliva sessilis Ruiz & Pavón
Bayer Code: SOVPT

Lawn burrweed, also known as spurweed, is a very low-growing winter annual weed that closely resembles parsley-piert and knawel. It is freely branched and usually does not root at the nodes. The leaves are oppositely arranged and highly divided into little leaf segments. Flowers are small (1/4 inch or less), broad, and inconspicuous. The seeds have sharp spines, hence the common name. Lawn burrweed is commonly found in turfgrass systems. Infestations are increasing in North Carolina, particularly in the southern Coastal Plain and Piedmont.
lawn burrweed
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lawn burrweed
lawn burrweed
lawn burrweed
lawn burrweed
Growth Season winter annual weed 
Growth Habit prostrate, spreading 
Leaflet Number one 
Leaf Margin lobedthree-lobed with each lobe again divided into lobes
Leaf Hairs upper/lower surfacesparsely hairy
Leaf/Leaflet Shape heart/kidney/spade 
Leaf Width <1/2 inch 
Leaf Venation palmate 
Leaf Arrangement opposite 
Root Type fibrous 
Flower Color  inconspicuous