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 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. ... Take iNaturalist NZ mobile with the iNaturalist mobile app: Help us ⦠Inflorescence is a raceme, sometimes branched, each raceme 6â12-flowered; flowering stems to 400 mm or more tall. Tiny white flowers appear on upright, wiry stems in early spring and continue to bloom until autumn. New Zealand bittercress is reported as new to the United States. Foraging for hairy bittercress can be as simple as walking out into your backyard. 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). Bittercress may be introduced as seed, seedlings or as plants in ⦠Lesser knotweed spreads readily from rhizome (root) ⦠Tags: Cardamine hirsute, bittercress, Hairy Bittercress, . Harvesting Hairy Bittercress. 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. Hairy bittercress is a hardy, frost-tolerant plant that remains green throughout the winter in most climates. It is a common weed in moist areas and has been transported to many new regions by humans. A related introduced weed, New Zealand bittercress, C. corymbosa, has become troublesome in polytunnels. Left unchecked, hairy bittercress can quickly spread to infest the whole garden. It is usually annual or biennial but occasionally perennial. In urban garden 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. Hairy bittercress is variable in size and leaf shape. Leaves up to 130 mm long, deeply lobed; moderatey hairy to hairless, somewhat glossy. Lesser knotweed is a perennial herb that can grow to one metre 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. New Zealand Bittercress. Perennial herb, a single rosette or with off-sets (short lateral branches). The whole plant remains very flat except for the mature seed pods which stand about 3 to 4 ⦠Bitter cress , land cress , lambâs cress , flick weed This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 New Zealand License . The taxon referred to here as Cardamine flexuosa With. 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