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 - June 01, 2011

From: Little Elm, TX
Region: Southwest
Topic: Plant Identification
Title: Identity of yellow thistle-like plant
Answered by: Nan Hampton

QUESTION:

Dear Mr.Smarty Plants, I see this flower along the road but I can't seem to find it on your website. It looks like a yellow thistle and it is a panicle and a head. It is about a foot tall. Do you know what it's name is? Cordially.

ANSWER:

I think the best bet for your plant that looks like a yellow thistle is Centaurea melitensis (Malta star-thistle).  You won't find it in our Native Plant Database since it is a non-native invasive plant introduced from Europe and North Africa.  It has been reported from many states and provinces in North America.  Although it hasn't been reported specifically from Denton County, it has been reported from nearby Ellis County.  Here are more photos.

There is a native thistle, Cirsium horridulum (Yellow thistle), that you will find in our database.  It has been reported in Denton County.  It isn't always yellow, however, and usually grows considerably taller than one foot.  Here are some photos of this thistle with yellow, rather than pink, blossoms.

If one of these isn't the plant you have seen, you can find links on our Plant Identification page to plant forums where you can submit photos (if you have them) for identification.

 

From the Image Gallery


Yellow thistle
Cirsium horridulum

Yellow thistle
Cirsium horridulum

Yellow thistle
Cirsium horridulum

More Plant Identification Questions

Need to identify hemp-like plant in Bastrop, TX.
June 09, 2014 - What is the large stalky, hemp-like plant that populates our creek bottoms and ditches here in Central Texas? It has large 5-6 in. lobed leaves, and a fibrous central stalk that gets up to 7 ft tall. ...
view the full question and answer

Identification of wildflowers in Wyoming
July 15, 2007 - I have taken some photos of wildflowers in Wyoming and although I have looked in several books and this website, I am still unable to identify a few. 1) very small white and lt. blue flower with 5 sep...
view the full question and answer

Identity of a plant at UGA Trial Gardens 15 years ago
August 14, 2012 - Looking to identify a plant that was in UGA trial gardens about 15 years ago, large plant with purple flowers, fuzzy leaves like a lambs ear. Thought it started with a Thiobana or something like that
view the full question and answer

Mystery plant in hay fields in Tennessee
July 13, 2008 - I found plants growing in my hay fields that are about 4 feet tall, large leaves and blooms (ball shaped) bell flowers.That is, the blooms looks like a pom pom with about 50 to 80 small flowers "hang...
view the full question and answer

Plant identification
April 07, 2011 - Comal County, Texas. Trying to identify a plant found growing in Comal Co. It was growing along the ground, with long, spiky leaves, and a ball of green flowers with a dark purple/brown 5 pointed sta...
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