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
Not Yet Rated

Wednesday - September 07, 2011

From: Roxboro, NC
Region: Southeast
Topic: Invasive Plants, Plant Identification, Poisonous Plants
Title: Plant identification of tree in North Carolina
Answered by: Nan Hampton

QUESTION:

I live in North Carolina have found a tree on our property that has thorny branches and round fruit (perfectly round) with a fuzzy outer layer that starts out green but then turns yellow. The inside resembles some kind of citrus fruit. They grow separately and not in clusters. What kind of tree is this? Thanks, Tara

ANSWER:

Mr. Smarty Plants believes your tree is Poncirus trifoliata (trifoliate orange) an invasive plant from China and North Korea.  Here are more photos and information.  You shouldn't try eating the fruit since it is listed as mildly toxic in the Poisonous Plants of North Carolina database.  It can also cause skin irritation. 

If this isn't the plant you described and you have photos of it, please visit our Plant Identification page to find links to several plant identification forums that accept photos of plants for identification.

 

More Invasive Plants Questions

Invasive common giant mustard
March 14, 2007 - I have been seeing a lot of a small shrubby plants with yellow flowers all over Austin, mainly along roadsides. Back in my day the first wildflowers of Spring were the paintbrushes and the bluebonnets...
view the full question and answer

Invasive, non-native Siberian peashrub for waller TX
February 02, 2012 - Good Morning Mr. Smarty Plants! I am trying to find out if the Siberian Pea Shrub is a good plant for Southeast Texas or if it is considered an invasive no no. It seems to have many qualities for wild...
view the full question and answer

Identification of vine from Las Vegas NV
July 11, 2012 - I'm interested in identifying the vine shown by the leaf in this photo: https://picasaweb.google.com/lh/photo/zR3R4JSPYcCI4ESczNXWM4h8z33Cq5cyZNqSSYf9hx0?feat=directlink My mother-in-law got one o...
view the full question and answer

Controlling Passionflora Incarnata propagation
March 20, 2012 - Would a cinderblock raised bed, 8 inches in height, be sufficient to contain the roots of passiflora incarnata and keep them from traveling to places where I don't want the vine? Are the roots deepe...
view the full question and answer

Invasive phragmites from New Egypt NJ
July 30, 2011 - I have some wetland near a road. It has been taken over by phragmites. How is the best way to remove these grasses and add some diversity to this area. The area in question is approx. 100 by 30 feet.
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
© 2014 Lady Bird Johnson Wildflower Center