Tansy Ragwort (Jacobaea Vulgaris/Senecio Jacobaea) POISONOUS
Tansy ragwort (Jacobaea vulgaris/Senecio jacobaea) POISONOUS
Description Richard Old, XID Services, Inc., Bugwood.org Tansy ragwort is a biennial plant or short-lived perennial in the sunflower Family (Asteraceae). Erect purplish-red stems grow to 1.5 m tall. Leaves grow up the coarse stem and are 2 or 3 times pinnately lobed. The daisy-like bright yellow flower heads have disk and ray flowers up to 0.5 inch long. Seeds are easily transported by wind, water and animals. One ragwort plant can produce in excess of 150,000 seeds. Seeds can lie dormant on the soil surface for 4 to 5 years or over 20 years if buried. The plant has deep tap roots. Key Identifiers Young plants have basal rosette of ruffled leaves Leaves are dark green on top, whitish-green underneath, and have deeply cut, blunt-toothed lobes with a ragged/ruffled appearance Flat-topped flower head clusters, composed of yellow, daisy-like flowers, with (usually) 13 petals Flowers have both disc & ray florets Seed has white pappus allowing wind dispersal Location in Canada Tansy ragwort known to be in Nova Scotia, New Brunswick, Prince Edward Island, Newfoundland and British Columbia, with sparse collections from Ontario and Quebec. Resources http://www.agf.gov.bc.ca/cropprot/tansy.htm http://www.invasiveplants.ab.ca/Downloads/FS-TansyRagwort.pdf http://www.invasive.org/browse/subinfo.cfm?sub=4418 http://www.bcinvasiveplants.com/files/publicphotos/?dir=.%2FInvasive+Plants%2FTansy+Ragwort%2F Similar species Common Tansy (Tanacetum vulgare) Flowers are only disc florets and lack “ruffled” leaves. http://www.invasiveplants.ab.ca/Downloads/FS-CommonTansy.pdf Desert Ragwort (Senecio eremophilus) Leaves lack “ruffed” appearance. http://em.ca/garden/native/nat_senecio_eremophilus.html Marsh Ragwort (Senecio congestus) Stems are hairy and leaves lack “ruffed” appearance. http://www.alaskawildflowers.us/Kingdom/Plantae/Magnoliophyta/Magnoliopsida/Asteraceae/Senecio_congestus/i ndex.html