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country flag of Exploring photos of the Cow Parsnip taken in United States of America

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  • Cow Parsnip - Heracleum maximum Cow parsnip is native to North America.  It is a HUGE plant that grows to be over 2 meters (7 ft) tall.  The flower umbels are 20 cm across and the leaves are up to 40 cm across!  It is often confused with Giant Hogweed (Heracleum mantegazzianum), but cow parsnip is not as toxic.  Cow Parsnip sap contains a phototoxin that reacts with ultraviolet light to cause skin irritation ranging from a mild rash to severe blistering.  It's kind of like an anti-sunscreen.

 Cow Parsnip,Geotagged,Heracleum,Heracleum maximum,Indian rhubarb,Spring,United States,celery,cow parsnip,pushki
    Cow Parsnip - Heracleum maximum
  • Cow Parsnip At first I was thinking that this must be giant hogweed - but there was so much of it that I decided it must not be, as that is considered to be a noxious invasive weed here in Washington and, I think, many counties require you to eradicate it if it is found on your property. Cow Parsnip,Geotagged,Heracleum maximum,Spring,United States
    Cow Parsnip
  • Cow Parsnip  Cow Parsnip,Geotagged,Heracleum maximum,Summer,United States
    Cow Parsnip
  • common cow parsnip  Cow Parsnip,Geotagged,Heracleum maximum,Spring,United States
    common cow parsnip
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