Directory: Pests: Weeds: Hemlock (3)   Articles Hemlock Leaves are fern / parsley-like, light green and smell unpleasant when crushed. Stems are hollow and often have purple spots. Small white flowers occur in clusters, similar to carrot and parsley plants. Dies down in winter and reproduces from seed. Hemlock - Conium Maculatum Foul smelling very poisonous plant. Most animals are put off by the smell. Subject to Pest Plant Management Strategies in several regions of NZ. Common in both the North and South Island. Hemlock - Conium maculatum Hemlock is a biennial weed probably best known for its poisonous properties. As such, it is not welcome in pastures. However, there are not many livestock losses from hemlock, as most livestock recognise it as being poisonous and leave it alone. Current Weather Warnings | Bookmark this page | Suggest a listing | Advertise on this page | Our Philosophy This page was last updated on 01 May 2013 All content and images copyright © 2013 Small Kiwi Farms New Zealand. Copyright of linked pages is retained by their owners. Small Kiwi Farms New Zealand is unable to give any assurance regarding the accuracy of this information.