{"id":7803,"date":"2020-02-23T18:06:31","date_gmt":"2020-02-24T02:06:31","guid":{"rendered":"https:\/\/cnpsslo.org\/?p=7803"},"modified":"2020-05-02T09:42:05","modified_gmt":"2020-05-02T16:42:05","slug":"invasive-species-report-poison-hemlock-conium-maculatum","status":"publish","type":"post","link":"https:\/\/cnpsslo.org\/2020\/02\/invasive-species-report-poison-hemlock-conium-maculatum\/","title":{"rendered":"Invasive Species Report: Poison-hemlock (Conium maculatum)"},"content":{"rendered":"<div id=\"attachment_7776\" style=\"width: 214px\" class=\"wp-caption alignright\"><a href=\"https:\/\/cnpsslo.org\/wp-content\/uploads\/2020\/02\/Conium.jpg\" target=\"_blank\" rel=\"noopener noreferrer\"><img decoding=\"async\" aria-describedby=\"caption-attachment-7776\" class=\"wp-image-7776 size-medium\" src=\"https:\/\/cnpsslo.org\/wp-content\/uploads\/2020\/02\/Conium-204x300.jpg\" alt=\"Poison-hemlock Conium maculatum\" width=\"204\" height=\"300\" \/><\/a><p id=\"caption-attachment-7776\" class=\"wp-caption-text\">Poison-hemlock Conium maculatum<\/p><\/div>\n<p>A member of the <em>Apiaceae<\/em> (Carrot) family Poison-hemlock is a biennial native to the Europe and North Africa and is a common weed, widespread in California. Poison-hemlock may germinate throughout the year. First year plants are low-growing and may overwinter in mild climates and plants resemble carrot plants. Stems are erect, hollow, smooth and bright green with purple-reddish blotches. Leaves grow to two feet long and are tri-pinnately compound. In late spring, robust plants reach 5-8 feet tall and produce numerous umbel-shaped clusters of tiny, white, 5-petaled flowers. Poison-hemlock grows in moist areas such as pond sides, creek<br \/>\nbanks and flood plains. It tends to grow in dense thickets and when the plants have dried out it is very difficult to walk through and the dead canes are toxic! It is notorious for displacing other vegetation. Plants reproduce only by seed and seeds may survive to about 3 years. Each flower produces two gray\u2013brown seeds. There are hundreds of seeds on each plant. Poison hemlock is highly toxic due the toxin coniine. Seeds have the highest concentration of coniine. All parts of the plant are poisonous. Cattle are especially vulnerable. There are limitations to controlling this plant: do not cut, burn or graze. Pulling it is one of the best options and it\u2019s especially important to pull out the root.<\/p>\n<p>-Mark Skinner, Invasive Species Chair<\/p>\n","protected":false},"excerpt":{"rendered":"<p>A member of the Apiaceae (Carrot) family Poison-hemlock is a biennial native to the Europe and North Africa and is a common weed, widespread in California. Poison-hemlock may germinate throughout the year. First year plants are low-growing and may overwinter in mild climates and plants resemble carrot plants.<\/p>\n","protected":false},"author":7807,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","_price":"","_stock":"","_tribe_ticket_header":"","_tribe_default_ticket_provider":"","_tribe_ticket_capacity":"0","_ticket_start_date":"","_ticket_end_date":"","_tribe_ticket_show_description":"","_tribe_ticket_show_not_going":false,"_tribe_ticket_use_global_stock":"","_tribe_ticket_global_stock_level":"","_global_stock_mode":"","_global_stock_cap":"","_tribe_rsvp_for_event":"","_tribe_ticket_going_count":"","_tribe_ticket_not_going_count":"","_tribe_tickets_list":"[]","_tribe_ticket_has_attendee_info_fields":false,"footnotes":""},"categories":[281,405],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Invasive Species Report: Poison-hemlock (Conium maculatum) - CNPS-SLO<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/cnpsslo.org\/2020\/02\/invasive-species-report-poison-hemlock-conium-maculatum\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Invasive Species Report: Poison-hemlock (Conium maculatum) - CNPS-SLO\" \/>\n<meta property=\"og:description\" content=\"A member of the Apiaceae (Carrot) family Poison-hemlock is a biennial native to the Europe and North Africa and is a common weed, widespread in California. Poison-hemlock may germinate throughout the year. 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