It is usually annual or biennial but occasionally perennial. Cardamine hirsuta, commonly called hairy bittercress, is an annual or biennial member of the mustard family (Brassicaceae), and is edible as a bitter herb. Left unchecked, hairy bittercress can quickly spread to infest the whole garden. Bitter cress , land cress , lamb’s cress , flick weed This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 New Zealand License . It is a common weed in moist areas and has been transported to many new regions by humans. Hairy bittercress is a hardy, frost-tolerant plant that remains green throughout the winter in most climates. Hairy bittercress is variable in size and leaf shape. The nursery tracked the shipment of contaminated plants to a wholesale … Inflorescence is a raceme, sometimes branched, each raceme 6–12-flowered; flowering stems to 400 mm or more tall. While collecting specimens to determine what Cardamine species occur in the nursery trade, New Zealand bittercress was discovered in a container nursery in Wilkes County, North Carolina. Lesser knotweed is a perennial herb that can grow to one metre tall. ... Take iNaturalist NZ mobile with the iNaturalist mobile app: Help us … The leaves are very similar to those of Hairy Bittercress, but are usually a brighter green in colour, often they are missing - probably because they have been eaten by slugs. hairy bittercress from Wakari, Dunedin 9010, New Zealand on April 22, 2020 at 03:28 PM by John Barkla. Waved bittercress, C. flexuosa, closely resembles hairy bittercress and is also variable in habit. Four species of bittercress were detected in the nursery industry of the United States, including New Zealand bittercress, hairy bittercress, flexuous bittercress, and little bittercress. Perennial herb, a single rosette or with off-sets (short lateral branches). The taxon referred to here as Cardamine flexuosa With. The whole plant remains very flat except for the mature seed pods which stand about 3 to 4 … Tags: Cardamine hirsute, bittercress, Hairy Bittercress, . Bittercress may be introduced as seed, seedlings or as plants in … Of the same family as cuckoo cress, Cardamine hirsuta is also commonly known as hairy bittercress and flick seed (because it flicks its seeds into the air). Lesser knotweed spreads readily from rhizome (root) … New Zealand bittercress is reported as new to the United States. New Zealand Bittercress. It has hairy leaves and bunches of white or pink flowers. In urban garden This weed can complete its lifecycle in three to four weeks to disperse thousands of seeds, all of which can germinate to release their own seeds in quick succession. Little is known about potential impacts in New Zealand, but in Britain it is a vigorous coloniser that grows in dense patches and suppresses other plants. 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