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Foliage.  Key characteristics: leaves are alternately arranged with irregularly lobed margins.  Veins have dense, straight hairs.

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Stems.  Note the stiff spines.

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Fruit.  Armed with stiff, yellow spines.

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Habitat.  Buffalobur is primarily a weed of pastures in Missouri.


Seed.  Seed have a wrinkled texture, nearly black in color and the length is approximately 2.0 to 3.0 mm.

Life cycle: summer annual.