Host an Event Volunteer Join Tickets

Support the plant database you love!

Q. Who is Mr. Smarty Plants?

A: There are those who suspect Wildflower Center volunteers are the culpable and capable culprits. Yet, others think staff members play some, albeit small, role. You can torture us with your plant questions, but we will never reveal the Green Guru's secret identity.

Help us grow by giving to the Plant Database Fund or by becoming a member

Did you know you can access the Native Plant Information Network with your web-enabled smartphone?

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
See a list of all Smarty Plants questions

Please forgive us, but Mr. Smarty Plants has been overwhelmed by a flood of mail and must take a break for awhile to catch up. We hope to be accepting new questions again soon. Thank you!

Need help with plant identification, visit the plant identification page.

 
rate this answer
Not Yet Rated

Monday - September 23, 2013

From: Round Rock, TX
Region: Southwest
Topic: General Botany, Poisonous Plants, Problem Plants
Title: Plant-related skin rashes from Round Rock TX
Answered by: Barbara Medford

QUESTION:

I have been plagued with persistent skin rashes this summer, and it is happening with plants that have never bothered me before, for example, red yucca. The dermatologist says it is a plant reaction, although 4 different doctors did tests to rule out scary systemic issues. My question is this: Is it possible that the drought has caused the essential oils in plants to be more concentrated, and hence more likely to cause a skin reaction? (Just trying to figure out why my garden suddenly hates me).

ANSWER:

We think your theory is as good as anyone else's on that subject. We did some searching on the Internet and found this article from Science Day on Drought Increasing Challenge to Hydraulic Systems of Plants. Another article, this one from the Texas A&M Forest Service, discusses The Effect of Drought Stress on Trees and Landscape Plants. While these articles both cite the problems plants have with reduced moisture in their branches, the point was also made that the stomata of the plants would close to preserve moisture, therefore reducing the chance of your coming into contact with that moisture.

So, we went on to look at the possibilities of sensitivities to allergens. Someone who has never been allergic to poison ivy or insect stings can have a reaction to one of those, and from then on become sensitized to those allergens. From the National Institute of Health, we found an article on The Sensitization Capacity of Plants on this subject, which included this line: "As a practical consequence, patients suffering from allergic contact dermatitis due to Compositae species are strictly requested to avoid contact with the offending species and all related species to prevent recurrences of their skin lesions."

Since you did not say which plants you suspected, and probably neither you nor your doctor can identify the precise culprit, we are going to call on our alter ego, Mr. Common Sense, for some advice. If you suspect something you are coming in contact with, and you don't know what it is or how to stop it, the best advice is to protect yourself. Long sleeves and pants, leather gloves or even heavy-duty rubber gloves, all of which should be carefully cleaned after a single wearing. We fully realize how hot and inconvenient that will be, but consider, would you rather sweat or itch?

 

More Poisonous Plants Questions

Plant mistakes from Cedar Park, TX
April 09, 2014 - At our "Wilts End" in Cedar Park, TX. and are looking for a tall shrub/tree that will hide a 6-ft tall concrete wall and muffle the noise from a busy street. The wall forms a very wide-angled V shap...
view the full question and answer

Plants Toxic to Horses
October 26, 2013 - I want to put planters on the front of my horse barn, which is also in the front field, so the horses could eat what is in it if they want to. I am looking to put a miniature pine tree in the planter....
view the full question and answer

Shade trees not toxic to dogs in Kempner TX
August 21, 2013 - Dear Mr Smarty Plants, we are looking for shade trees to plant around our home in Kempner, Tx. I saw another family that asked a similar question but we have dogs and holly or oak trees are toxic (my...
view the full question and answer

Is Savannah Holly poisonous to burn in Hanahan, SC.?
August 20, 2011 - Can you please tell me if the wood from a savannah holly bush is poisonous to burn?
view the full question and answer

Identification of shrub with red berries in Tennessee
January 24, 2014 - Hello, I've got a shrub in my backyard; it has leaves off in groups of 3 and it has multiple reddish berries in groups by the dozens. I'm not sure what plant it is. The shrub is stick-like and appr...
view the full question and answer

Support the Wildflower Center by Donating Online or Becoming a Member today.