![Pennsylvania pests: Deadly poison hemlock re-emerging; officials on lookout for spotted lanternfly compliance | Pittsburgh Post-Gazette Pennsylvania pests: Deadly poison hemlock re-emerging; officials on lookout for spotted lanternfly compliance | Pittsburgh Post-Gazette](https://9b16f79ca967fd0708d1-2713572fef44aa49ec323e813b06d2d9.ssl.cf2.rackcdn.com/1140x_a10-7_cTC/poison-hemlock-1623861653.jpg)
Pennsylvania pests: Deadly poison hemlock re-emerging; officials on lookout for spotted lanternfly compliance | Pittsburgh Post-Gazette
![Conium maculatum, poison hemlock, Grouse Mountain, North Vancouver, British Columbia, Canada Stock Photo - Alamy Conium maculatum, poison hemlock, Grouse Mountain, North Vancouver, British Columbia, Canada Stock Photo - Alamy](https://c8.alamy.com/comp/2BM2K14/conium-maculatum-poison-hemlock-grouse-mountain-north-vancouver-british-columbia-canada-2BM2K14.jpg)
Conium maculatum, poison hemlock, Grouse Mountain, North Vancouver, British Columbia, Canada Stock Photo - Alamy
![Hemlock, Carrot Fern, Poison Hemlock, Poison Parsley, Spotted Hemlock, Wild Carrot, Wild Parsnip - Weeds Australia Hemlock, Carrot Fern, Poison Hemlock, Poison Parsley, Spotted Hemlock, Wild Carrot, Wild Parsnip - Weeds Australia](https://weeds.org.au/wp-content/uploads/2020/03/2531_Conium_maculatum.jpg)
Hemlock, Carrot Fern, Poison Hemlock, Poison Parsley, Spotted Hemlock, Wild Carrot, Wild Parsnip - Weeds Australia
![Poison hemlock and Western waterhemlock: deadly plants that may be growing in your pasture | OSU Extension Service Poison hemlock and Western waterhemlock: deadly plants that may be growing in your pasture | OSU Extension Service](https://extension.oregonstate.edu/sites/default/files/styles/full/public/images/2022-06/screen-shot-2022-06-21-33227-pm.png?itok=sneydSot)
Poison hemlock and Western waterhemlock: deadly plants that may be growing in your pasture | OSU Extension Service
![Poison hemlock was spotted in Lancaster. Here's what you should know about the plant | News | dentonrc.com Poison hemlock was spotted in Lancaster. Here's what you should know about the plant | News | dentonrc.com](https://bloximages.newyork1.vip.townnews.com/dentonrc.com/content/tncms/assets/v3/editorial/c/cd/ccd463c7-f8b9-5421-adac-28b0f3b6070e/647beefa999c1.image.jpg)