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

Friday - September 12, 2014

From: Round Rock, TX
Region: Southwest
Topic: Invasive Plants, Non-Natives, Plant Identification, Vines
Title: Difference between invasive Chinese and Japanese wisterias and native wisteria
Answered by: Nan Hampton

QUESTION:

Dear Mr or Ms Smarty Plants, Is there any way I can tell for sure if my wisteria is native? I bought it at a place when it was in bloom that sold a lot of native plants. I Would like to know for sure before starting a cutting for the backyard. I've had it for about 15plus years, some leaves get chlorotic in our Round Round soil in the summer time ( or is it just from drought?) it blooms sporadically during the hot summer, but it is not what I would call easy to control. The American native gets up to 39feet tall and this one has scrambled easily that high to the tops of our trees and again after pruning. I've never seen it sprout from roots, though it's seeds do sprout and I pull those up. It does twine counterclockwise like the Chinese variety. Any help appreciated.

ANSWER:

This page from Henderson State University in Arkadelphia, Arkansas tells the difference between the two invasives, Wisteria sinensis (Chinese wisteria) and Wisteria floribunda (Japanese wisteria) and the differences between those two and the native Wisteria frutescens (American wisteria).  The article says:  "Wisteria frutescens is not an aggressive grower and has glabrous fruits and more or less cylindrical, bean-shaped seeds."  That is, W. sinensis (Chinese wisteria) and W. floribunda (Japanese) have fuzzy seed pods; whereas, W. frutescens (American wisteria) has smooth seed pods.

Here is another take on the differences from The Citrus Guy, a Certified Professional Nurseryman and Charleston County Master Gardener from South Carolina citing the seed pod fuzziness for the invasives and the seed pod smoothness for the native wisteria and with other more subtle differences as well.

 

From the Image Gallery


American wisteria
Wisteria frutescens

American wisteria
Wisteria frutescens

More Non-Natives Questions

Non-native, invasive Arctium minus in New York
June 13, 2006 - For as long as I can remember, my family has been picking and eating a wild plant which we and other Italian families call " cardoons". I've often heard to it referred to burdock but no one knows t...
view the full question and answer

Replacement for non-native Italian Cypress in Austin
July 10, 2011 - I would appreciate your assistance with some native plant options to replace Italian Cypress trees in the Arboretum area of Austin, TX. I have 12 of the trees on the north side of the house to obstru...
view the full question and answer

Non-native sedum 'Burrito' sunburned in Providence RI?
June 28, 2010 - I have a sedum burrito that I keep outside and receives bright sun for around 6 hours a day. it looks like it's getting sunburned, the leaves are getting shriveled and browning on the tips. I've bro...
view the full question and answer

Care for non-native tropical Hibiscus rosa sinensis in Clinton Township MI
October 18, 2010 - Do I have to bring a painted lady hibiscus tree in for the winter? We planted it in the ground and it did great this summer, but I do not know if we have to put it in a pot and bring it in for the wi...
view the full question and answer

Failure to thrive of non-native Purple Orchid Tree
March 09, 2009 - We planted purple orchid tree Texas,zone 9 two weeks ago and all leaves turned brown.My husband used root stimulator with enough water as the instructions said.We took all brown leaves off and now it...
view the full question and answer

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