Cirsium ochrocentrum is a PERENNIAL growing to 1.5 m (5ft). Like stinging nettle, there are opposite leaves and … %PDF-1.6 %���� Creeping Thistle or Marsh Thistle can look similar - check the pappus hairs if in doubt. Medium to tall plant to 1.2 metres, stems spiny-winged to the top, sometimes branched above. Carduus palustris, or Cirsium Palustre, the Marsh Plume Thistle, is very common in meadows, marshes and bogs, by the sides of ditches, etc., and is generally distributed over the country. It is cold hardy and is found all the way to the arctic circle, and can invade boreal forest. Infestation Information. �:!���\E�e4� Negative - Subject was not present at time of report.. 0 These purple flowered prickly invaders are native to Europe and Asia but have made themselves readily at home here in southern Alberta. There are a number of different species of thistles on the west coast, including bull thistle, canadian thistle, and milk thistle. The various species have the same edibility characteristics. Plants grow up to 1.5 metres in height at maturity. 56.25473,-117.91162. On Beaver Island this plant is more likely to be found in moist areas than in dry sand. Pas besoin de vous inscrire, achetez dès maintenant ! The strong stems have few branches and are covered in small spines. The species is hermaphrodite (has both male and female organs) and is pollinated by Bees, flies, Lepidoptera (Moths & Butterflies), beetles. Canada thistle develops seeds sparingly and may produce 1,000 to 1,500 seeds per flowering shoot. were applied.. Eradicated - Subject was present previously but is not at time of survey and has been determined to be removed from the area surveyed. Canada, nodding, marsh and plumeless thistle, are all designated noxious and prohibited noxious weeds in Alberta. Marsh thistle’s flowers are a good example of early, simple stage of evolution – all flower heads are alike with no division between inner and outer petals. The leaves are typically spiny and deeply lobed. Marsh Thistle is a new addition to Minnesota's growing non-native invasive species list. ID guidance. Datum. Distinguish from Marsh Hedge Nettle (Stachys palustris). Thistle, Canada. Matgrass, Nardus stricta 53. The thistle produces white or pink flowers from August to October. Canada Thistle is the only species of today's Weed Control Act that was already regulated in the first Alberta weed regulation in 1907. Prohibited Noxious weeds are plant species designated in the Alberta Weed Control Act. goatgrass, jointed knapweed, Tyrol thistle, marsh hawkweed, meadow knotweed, giant thistle, nodding hawkweed, mouse-ear knotweed, hybrid Japanese thistle, plumeless hawkweed, orange knotweed, Japanese hoary alyssum loosestrife, purple Noxious Weeds in Alberta (29) Huge collection, amazing choice, 100+ million high quality, affordable RF and RM images. Stems are erect, mostly un-branched, up to 2.5m tall, and have spiny wings along the stem except just below the flowering head. 43 0 obj <> endobj Marsh Thistle Cirsium palustre (Aka marsh plume thistle, European swamp thistle) continued next page Kale Jonker Last Updated January 2014 Alberta Regulation: Weed Control Act Overview: Marsh thistle is a biennial or short-lived perennial native to Europe. Name The second part of the Latin name "Palustre" means bog or marsh. Much of the plant is covered in long, sticky hairs. The plant is self-fertile. See Fact Sheets - Alberta Invasive Species Council. [Marsh Thistle]has a rosette (circle) of leaves at the base that are long, spiny, and deeply lobed. The stems have spiny wings, continuous all the way to just below the flower-head. It reproduces through both seed and root regeneration, but the latter is the most successful. Marsh thistle is one of the tallest biennial in Finland (compare giant hogweed): the stem that rises from the centre of its rosette often reaches 2 metres (6.5 feet) in height. thistle, marsh — Cirsium palustre (L.) Scop. Species; Additional images; Click here to support NatureSpot by making a donation - small or large - your gift is very much appreciated. The plant, related to the sunflower, can grow to eight feet tall. Pictures << previous picture | next picture >> Field Notes. Those listed as ‘Uncategorized’ have been proposed for addition to the Alberta Weed Control Act and are awaiting approval by the Minister. DS7 �&"�|�)����7� yoT� ����t׶� �焋�J�Xr&]��� p����+f��j�&����mnqeK��� RCY+����~QU#�~"`��1=�6��p��;���^����P=tA������f�%�$�� © 2020 City of Edmonton. Provincial Designation: Prohibited noxious: Life Cycle: Biennial: Mode of Spread: Seed: Pest Comments <