File:Cow-parsnip (15369939346).jpg

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Description Cow-parsnip (Heracleum maximum) is a tall plant with 3-lobed leaves and large clusters of white flowers commonly found along roadsides and wet areas throughout low- to mid-elevations in the park. Plants in the Heracleum spp. family contain substances called "furanocoumarins" in the outer skin and sap that act as a natural defense against fungal attacks for the plants, but exposure to them in people can cause skin irritation. Cow-parsnip is relatively mild, and historically many native peoples have eaten peeled cow-parsnip stems and roots with no ill effects, but watch out for the related Giant Hogweed (Heracleum mantegazzianum) which is classified as a Federal Noxious Weed. High levels of furanocoumarins in its sap can cause severe skin irritation, rashes, and blisters. Giant Hogweed is much larger than Cow-parsnip, with red-flecked or reddish-purple stems. A few Giant Hogweed plants have been reported in the park but it is rare. NPS/ Carol Miltimore photo taken June 25, 2014.
Date
Source Cow-parsnip
Author Mount Rainier National Park from Ashford, WA, United States

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This file is licensed under the Creative Commons Attribution 2.0 Generic license.
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This image was originally posted to Flickr by Mount Rainier NPS at https://flickr.com/photos/78037339@N03/15369939346. It was reviewed on 10 February 2016 by FlickreviewR and was confirmed to be licensed under the terms of the cc-by-2.0.

10 February 2016

Public domain This image or media file contains material based on a work of a National Park Service employee, created as part of that person's official duties. As a work of the U.S. federal government, such work is in the public domain in the United States. See the NPS website and NPS copyright policy for more information.

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current19:43, 10 February 2016Thumbnail for version as of 19:43, 10 February 20161,200 × 753 (179 KB)Holly Cheng (talk | contribs)Transferred from Flickr via Flickr2Commons

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