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Hint: Spherical head, larger head (10-20mm)

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Hint: Spherical heads, smaller (<10mm diameter)

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Hint: Hemispherical head, larger (10-20mm diameter), plant is generally 'beefy'

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Hint: hemispherical heads, smaller (6-10mm diameter)

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Hint: elongated capsule extends beyond the sepals (seen in southern 1/3 of the state)

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Hint: longer friable auricle (1-3mm beyond base of leaf blade)

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Hint: short thick auricle (<1mm), turns yellow to brown later in the season

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Hint: short membranous auricle (<1mm)

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Hint: rounded capsule, flat leaves (4-6mm)

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Hint: rounded capsules, flat leaves (1-3mm)

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Hint: roadside annual