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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&#039;s kind of like an anti-sunscreen.<br />
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 Cow Parsnip,Geotagged,Heracleum,Heracleum maximum,Indian rhubarb,Spring,United States,celery,cow parsnip,pushki Click/tap to enlarge Promoted

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.

    comments (4)

  1. Great shot! We call it "Hogweed" down South! Posted 2 years ago
    1. Thank you :). Giant Hogweed is very similar, but has purple blotches on the stem and the leaves aren't fuzzy...Plus, Giant Hogweed grows to 20 feet tall! Is it Giant Hogweed that you have, or do you just refer to Heracleum maximum as "hogweed"? Both are not to be messed with :O Posted 2 years ago
      1. I wish I could have backed up far enough to get a shot of the entire plant! Posted 2 years ago
        1. I'm thinking of Giant Hogweed! My mistake! Posted 2 years ago

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''Heracleum maximum'', cow parsnip is the only member of the genus ''Heracleum'' native to North America. Its classification has caused some difficulty, with recent authoritative sources referring to it variously as ''Heracleum maximum'' or ''Heracleum lanatum '', as ''H. linatum'', or as either a subspecies, ''H. sphondylium'' subsp. ''montanum'', or a variety, ''H. sphondylium'' var. ''linatum'', of the common hogweed . The classification given here follows ITIS.

Similar species: Ginseng And Carrots
Species identified by Christine Young
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By Christine Young

All rights reserved
Uploaded Jun 15, 2018. Captured Jun 10, 2018 11:55 in 281 Main St S, Woodbury, CT 06798, USA.
  • Canon EOS 80D
  • f/4.0
  • 1/256s
  • ISO100
  • 100mm