Botanical name: Cardamine hirsuta Family: Brassicaceae (Mustard family)
Hairy Bitter Cress is a winter annual plant native to Europe and Asia. It has unique foliage that makes it is easy to identify among other weeds. The leaflets on the foliage have a club shape, evident on even small seedlings. Leaves of bittercress seedlings are often simple, while leaves that develop later are generally compound. The small white flowers are borne in a corymb on wiry green stems, soon followed by the seeds and often continuing to flower as the first seeds ripen. Each flower has 4 white petals, generally 3 to 5 mm in diameter. The seed are borne in siliquae which, as with many mustard family species, will burst explosively, often when touched, sending the seeds flying far from the parent plant.
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The flower labeled Hairy Bitter Cress is ...