description Cow Parsnip Overview
Cow parsnip, Heracleum maximum, is a tall herbaceous plant in the carrot family, Apiaceae, native to North America. It can reach about three meters and produces broad leaves and flat-topped clusters of small white flowers. Its sap contains furanocoumarins, compounds that can cause a light-sensitive skin reaction after contact followed by exposure to ultraviolet light, so the plant is relevant to botanists, land managers, and foragers.
help Cow Parsnip FAQ
What is cow parsnip?
Cow parsnip is the tall North American herb Heracleum maximum in the carrot family, Apiaceae. It can grow to about three metres and produces broad leaves with flat-topped clusters of small white flowers.
Is cow parsnip the same plant as giant hogweed?
No. Cow parsnip is Heracleum maximum, while giant hogweed is Heracleum mantegazzianum, a different species that can grow larger and is more strongly associated with severe sap reactions.
Can cow parsnip cause a skin reaction?
Yes. Its sap contains furanocoumarins, compounds that can make skin unusually sensitive to sunlight and lead to blistering or burns. Avoid touching the sap and wash exposed skin promptly.
Where does cow parsnip grow?
It is native to North America and is commonly associated with moist ground, forest edges, roadsides, and open mountain or meadow habitats. Its tall size and broad leaves make it easy to confuse with other Apiaceae plants.
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