Cicuta maculata

Description

Cicuta maculata is a rhizomatous perennial herb producing a hollow erect stem that can reach a height of 1.8 m. The long leaves are made up of several lance-shaped, pointed, serrated leaflets. Each shiny green leaflet is 2 to long and the entire leaf may be up to 40 cm long. The inflorescence of white flowers is similar in appearance to other species in the carrot family. It is a compound umbel with many clusters of flowers. The dry tan-brown fruit is a few millimeters long.

The plant prefers wet habitats, such as wet meadows, roadside ditches, pond margins, open marshes, and freshwater swamps. Flowering is from May to September.

The poisonous plant is occasionally mistaken for parsnips, due to its clusters of white tuberous roots.

|Cicuta maculata upper stem leaf, Water Hemlock, Howard County, Md, Helen Lowe Metzman 2018-07-17-13.31.32 ZS PMax UDR-Recovered (48602410012).jpg|Leaves |Cicuta maculata - Flickr - aspidoscelis (1).jpg|Flower umbels |Cicuta maculata 2, Water Hemlock, Howard County, Md, Helen Lowe Metzman 2018-07-17-12.52.39 ZS PMax UDR (49038651216).jpg|Close-up of flowers

Toxicity

Main article: Cicuta toxicity

The confusion with parsnips can be fatal as C. maculata is extremely poisonous. It is considered to be North America's most toxic native plant.

Cicuta is fatal when swallowed, causing violent and painful convulsions. Though a number of people have died from water hemlock poisoning over the centuries, livestock have long been the worst affected (hence the name "cowbane"), with ingestion of the plant causing death in as little as 15 minutes.

The chief poison is cicutoxin, an unsaturated aliphatic alcohol that is most concentrated in the roots. Upon human consumption, nausea, vomiting, and tremors occur within 30–60 minutes, followed by severe cramps, projectile vomiting, and convulsions. Occasional long-term effects include retrograde amnesia. Ingestion of water hemlock in any quantity can result in death or permanent damage to the central nervous system.

Conservation

While the species as a whole is not under threat of extinction according to the International Union for Conservation of Nature the variety C. maculata var. victorinii (Victorin's water-hemlock) is a listed Species of Concern under Schedule 1 of the Canadian Species at Risk Act. According to a 2022 Committee on the Status of Endangered Wildlife in Canada (COSEWIC) report, Victorin's water-hemlock, the sole variety of C. maculata that grows in parts of tidal marshes with brackish exposure and regular tidal inundation, will soon qualify for threatened status if threats are not addressed. Victorin's water-hemlock is endemic to the St. Lawrence River estuary, which is in Canada.

Common names

Cicuta maculata possesses an extensive number of commons names. ;English

• Beaver poison
• Cicutaire (Canadian name)
• Musquash root
• Spotted hemlock
• Spotted water hemlock
• Spotted cowbane ;Seneca
• o'nö́hsë:ë'

References

References

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