Explore Plants

Share

Ask Mr. Smarty Plants

Ask Mr. Smarty Plants is a free service provided by the staff and volunteers at the Lady Bird Johnson Wildflower Center.

Search Smarty Plants
    
 

Can't find the answer in our existing FAQs, submit a question to Mr. Smarty Plants.
Need help with plant identification, visit the plant identification page.

rate this answer
Not Yet Rated

Thursday - April 03, 2008

From: Jacksonville, NC
Region: Southeast
Topic: Poisonous Plants
Title: Campsis radicans or cow itch
Answered by: Barbara Medford

QUESTION:

We cleaned my father-in-law's home-place up out in the country week-before-last. My wife, her 2 sisters and a niece have this unusual-looking poison on them. It is big red places and itches all over their bodies. Some say it is "cow itch". What is cow itch and what does it look like?

ANSWER:

One of the common names for Campsis radicans (trumpet creeper) is cow itch vine. We found a website on trumpet creeper that mentioned the irritation caused by contact with this vine; however, it states that the irritation should only last for a few minutes. It is a native of North Carolina, and easily escapes cultivation and gets all over everywhere, so you could easily have come in contact with it during your cleanup operation. Unfortunately, we suspect what you actually encountered is Toxicodendron radicans (eastern poison ivy). This plant is also native to North Carolina, and often found in shady, neglected areas. The rash from this for those sensitive to it (and nearly everyone is) is much more persistent, painful and hard to control. We don't have pictures for the two different rashes-a rash is a rash, showing up differently on different types of skin, etc. The members of your family that had the misfortune to come in contact with it should probably see a doctor. There are treatments for the rash, and it can be almost disabling until it goes away. You will note, when you read the webpage for this vine, that it can have many different appearances, and here is a page of images of the plant. We'll add a couple from our own Image Gallery. You can compare the leaves of the trumpet creeper with the leaves of the poison ivy, and see that, even when the trumpet creeper is not in bloom, there shouldn't be any confusion between the two plants. Remember the old saying, "Leaves of three, leave them be."

 

 

More Poisonous Plants Questions

What is white sticky substance in the Mandevilla vine?
June 15, 2012 - When I was watering my Mandevilla one of the vines broke and there was a white, sticky substance that came out of the vine. I was just curious as to what that is.
view the full question and answer

Living fence line from Thomasville GA
November 04, 2012 - I would like to create a natural fence line on my property in South Georgia. They need to be pretty dense and horse, cow, goat friendly, growing to a height of about 4ft, preferably quickly! Do you ...
view the full question and answer

Vines non-poisonous to dogs from Madison WI
June 09, 2013 - Are there any vines or crawlers that are non poisonous to dogs? Everything I am finding is poisonous, I want to plant some vines up a fence on their kennel run.
view the full question and answer

Is Texas ragwort (Senecio ampullaceus) toxic to livestock?
May 05, 2009 - Mr. Smarty Plants, I have a question related to Texas Ragwort (Senecio ampullaceus): I am concerned about toxicity to livestock as well as interested in natural control methods. I was recentl...
view the full question and answer

Is the fruit of Bradford Pears toxic to dogs?
November 16, 2010 - I need to know if the little Berries on the Bradford Pear trees are toxic to dogs? My labrador loves eating them. Thank you,
view the full question and answer

Smarty Plants's Facebook profile Support the Wildflower Center by Donating Online or Becoming a Member today.

Mr. Smarty Plants wants you to be his Facebook friend. Click the Facebook icon to add yourself to Mr. Smarty Plants list of friends.