Burweed, Lawn


Lawn burweed is a small, low-growing winter annual broadleaf plant that inhabits turf, compacted paths, roadsides, pastures, and disturbed, unmanaged areas. Its sharp, bur-like fruit can puncture human and animal skin, making it a nuisance in turf. Leaves are deeply and finely divided, covered with fine hairs and are alternate to one another along the stem. Stems often branch at the base and usually have dark to purple spots. Flowers cluster into inconspicuous spiny flower heads and grow from where the leaf stalk meets the stem. Each tiny fruit is flattened, minutely hairy, winged, and has one spine. Two slightly curved teeth flank either side of the spine. One oval, flattened seed is found with each fruit. Lawn burweed reproduces by seed.

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