Conium maculatum - Wikipedia
Conium maculatum, known as hemlock (British English), [2] or poison hemlock (American English) [3] is a highly poisonous flowering plant in the carrot family Apiaceae, native to Europe and North Africa. It is herbaceous without woody parts and has a biennial lifecycle.
How to Identify and Remove Poison Hemlock - The Spruce
Jul 3, 2024 · The leaves and stems are hairless. In the spring of its second year, after the plant emerges from its winter dormancy, poison hemlock develops branching and grows a flowering stalk towering between 8 to 10 feet. The stem is sturdy yet hollow. It might appear ridged because of its veins.
Poison Hemlock Identification and Management | University of …
Dec 14, 2022 · Poison Hemlock (Conium maculatum, Fig. 1), is a member of the plant family Apiaceae, which contains a few important crops such as carrots, celery, and parsnips. This weed is a tall, invasive, and highly poisonous weed that is sometimes mistaken for one of its crop relatives. It is also commonly mistaken for Queen Anne's Lace (Daucus carota).
Poison Hemlock - Penn State Extension
Dec 19, 2022 · Poison hemlock (Conium maculatum) is a biennial, which means the first year of growth ends with a low growing (basal) rosette of foliage. During the second year, the stem, branches and flowers are produced. Poison hemlock can reach up to 6 feet in height.
Poison Hemlock | USU - Utah State University Extension
Season: Cool. Growth Characteristics: A forb, native to Europe, growing 5 to 10 feet tall. Stems are erect, stout, and purple-spotted with distinct ridges and extensively branched. Foliage has a strong musky odor. Flowers/Inflorescence: Flowers are borne in many umbrella-shaped clusters, each supported by a stalk (pedicel). Flowers are white ...
Poison Hemlock (Conium maculatum) - USDA ARS
Poison-hemlock has white flowers that grow in small erect clusters. Each flower develops into a green, deeply ridged fruit that contains several seed. After maturity, the fruit turns grayish brown.
Exotic Species: Poison Hemlock - U.S. National Park Service
White flowers are borne in umbrella-shaped clusters; Fruit is egg-shaped in outline, with distinctive wavy ribs on the surface; Highly toxic; Habitat and Ecology. Native to Europe, western Asia, and North America, poison hemlock (Conium maculatum) is now naturalized in almost every state in the United States. It was introduced in the 1800s as a ...
This cool-season biennial develops as a basal rosette the first year, followed by the growth of flowering stems the second year (USDA 2016; Vetter 2004). Hairless seedlings feature narrow, lanceolate cotyledons and a pinnately compound first leaf (Figure 1) (Bryson and DeFelice 2009; Vetter 2004). Erect, hollow stems are branched and
Hemlock - The Wildlife Trusts
Hemlock. Scientific name: Conium maculatum. A notoriously poisonous plant, hemlock produces umbrella-like clusters of white flowers in summer. It can be found in damp places, such as ditches, riverbanks and waste ground.
Hemlock - Plantlife
It can also be distinguished through it’s flowering time, as it flowers after Cow Parsley, and around the same time as Hogweed, in June and July. Hemlock could be confused with Hogweed, Upright Hedge-parsley and Hemlock Water-dropwort (also poisonous).
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