A related introduced weed, New Zealand bittercress, C. corymbosa, has become troublesome in polytunnels. 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). Foraging for hairy bittercress can be as simple as walking out into your backyard. 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. Perennial herb, a single rosette or with off-sets (short lateral branches). Leaves up to 130 mm long, deeply lobed; moderatey hairy to hairless, somewhat glossy. Bittercress may be introduced as seed, seedlings or as plants in … Left unchecked, hairy bittercress can quickly spread to infest the whole garden. 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. Hairy bittercress is a hardy, frost-tolerant plant that remains green throughout the winter in most climates. Harvesting Hairy Bittercress. Inflorescence is a raceme, sometimes branched, each raceme 6–12-flowered; flowering stems to 400 mm or more tall. Cardamine hirsuta, commonly called hairy bittercress, is an annual or biennial member of the mustard family (Brassicaceae), and is edible as a bitter herb. Tiny white flowers appear on upright, wiry stems in early spring and continue to bloom until autumn. Lesser knotweed is a perennial herb that can grow to one metre tall. New Zealand bittercress is reported as new to the United States. Waved bittercress, C. flexuosa, closely resembles hairy bittercress and is also variable in habit. New Zealand Bittercress. It is usually annual or biennial but occasionally perennial. 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. Tags: Cardamine hirsute, bittercress, Hairy Bittercress, . 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. The nursery tracked the shipment of contaminated plants to a wholesale … 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 . Lesser knotweed spreads readily from rhizome (root) … In urban garden Hairy bittercress is variable in size and leaf shape. It is a common weed in moist areas and has been transported to many new regions by humans. hairy bittercress from Wakari, Dunedin 9010, New Zealand on April 22, 2020 at 03:28 PM by John Barkla. 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