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

Thursday - July 14, 2011

From: Kingsland, TX
Region: Southwest
Topic: Plant Identification
Title: Plant Identification
Answered by: Nan Hampton

QUESTION:

What is the common purple flower found in fields that has a yellow flattened oval berry like pod after blooming? Leaves are grayish green. I am thinking in the nightshade family? It is a bane to a pasture and we would like to know how to eradicate it in the most benign way in order to have a better hay harvest. Any tips there would be greatly appreciated! Thank you for your help!

ANSWER:

This sounds like Solanum elaeagnifolium (Silverleaf nightshade).  It is considered a noxious weed in several states in North America where it is native.   In other countries it is considered an invasive non-native plant.   Here is information from the European and Mediterranean Plant Protection Organization (EPPO) on silverleaf nightshade's geographical, biology and means of eradication.  There are several reasons to eradicate it from areas where food crops for humans and livestock are grown—it competes for moisture and nutrients of the crops you are growing for hay; it may inhibit the growth of some plants (allelopathy); and it (especially the fruits) is considered toxic for livestock so you certainly don't want it mixed in with your hay.  The EPPO admits that this plant is difficult to eradicate.  Both the EPPO and Washington State Noxious Weed Control Board report that herbicides are not very effective in controlling it.  The most benign way to get rid of the plant is to pull or dig up the plants and dispose of them.  Depending on how large your area is and how much help you have, this may or may not be feasible.  Once you have removed them, you will need to monitor for new plants.  The plants do pull up relatively easily; however, you need to wear heavy gloves to pull them because the stem has sharp spines.  Merely cutting them will not eradicate them since they can regrow from the stems and roots.

 

From the Image Gallery


Silverleaf nightshade
Solanum elaeagnifolium

Silverleaf nightshade
Solanum elaeagnifolium

Silverleaf nightshade
Solanum elaeagnifolium

More Plant Identification Questions

Identification of a plant saprophytic on oaks
October 04, 2012 - What is name of plant poking up through the leaves near base of oak tree that appears as a cluster of yellow-brown stalks that resemble small pinecones or pineapples or cobs of corn?
view the full question and answer

Plant Identification
August 15, 2008 - My father-in-law received seeds from a friend-- he didn't know what kind of plant it would grow. Now he questions what kind of plant it is-- it has a red stalk and 17 inch leaves, it appears to grow...
view the full question and answer

Identification of tree with outrageous thorns
August 10, 2014 - Can you identify this tree? It has these outrageous thorns on its trunk. They are in clusters and are anywhere from 1" long to 4" long or so.
view the full question and answer

Horsemint for Connecticut
July 01, 2015 - Will horsemint grow in Connecticut?
view the full question and answer

Identification of bluebonnet-like flower
May 14, 2012 - I have discovered a plant that looks like a bluebonnet but is much larger. It has leggy stems and similar leaf structure and the bonnet in more compact with purple vs blue flowers. The plant is growin...
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