En EspaŅol

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
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
2 ratings

Tuesday - August 18, 2009

From: Aurora, MN
Region: Midwest
Topic: Poisonous Plants
Title: Toxic effect of mulberry fruits and sap
Answered by: Nan Hampton

QUESTION:

What would be the toxic effect of the unripe fruit of the mulberry tree or the white sap?

ANSWER:

The Poisonous Plants of North Carolina database lists both the North American native Morus rubra (red mulberry) and the introduced Morus alba (white mulberry) as mildly toxic.  The toxic parts are the unripe berries and the white sap from any part.  The symptoms are hallucinations and stomach upset.  This database says that it "causes only low toxicity if eaten". This is the only toxic plant database I could find, however, that listed it. 

Delena Tull in Edible and Useful Plants of Texas and the Southwest says that the pollen of these two trees causes hay fever.  She also says: 

"Unripe fruit and milky sap can cause gastrointestinal distress and some toxicity...The sap can cause a skin rash."

L. A. Peterson in A Field Guide to Edible Wild Plants of Eastern and Central North America says about both species:

"Unripe fruit and raw shoots contain hallucinogens."


Morus rubra

Morus rubra

 

 

More Poisonous Plants Questions

Are seeds of trumpet vine poisonous from Creston BC
September 12, 2013 - Are the seeds in the trumpet vines pods poisonous to humans or can I use them as dried beans? I have one plant that covers most of my house's south wall. It is a very established plant.
view the full question and answer

Plum trees (Prunus spp.) poisonous to horses
June 08, 2008 - Are fruitless plum trees poisonous to horses
view the full question and answer

Ingestion of agave sap from Albuquerque NM
June 11, 2013 - My boyfriend was out in the Arizona desert without water for two days and sought moisture through what he thought was a yucca plant but instead we believe was agave. He sucked the moisture off the ins...
view the full question and answer

Is Thalia dealbata toxic to dogs?
May 16, 2011 - A pond in a park frequented by dogs contains Thalia dealbata and I have seen numerous dogs eating the roots with relish, which we discourage, of course. They seem to really enjoy it though. Aft...
view the full question and answer

Is Texas Mountain Laurel Honey Toxic in Fulshear, TX?
March 11, 2012 - Toxicity of Texas Mountain Laurel HONEY I know the seeds and leaves of the Tx Mountain Laurel are toxic. But, is honey that comes from the Mountain Laurel toxic too? I heard that it is, but can'...
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.
E-NEWSLETTER | BECOME A MEMBER | DONATE NOW | MEDIA | SITEMAP | STAFF
© 2015 Lady Bird Johnson Wildflower Center