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
3 ratings

Sunday - July 14, 2013

From: Beavercreek, OH
Region: Midwest
Topic: Invasive Plants, Plant Identification
Title: Identification of fast-growing weeds with orange flowers
Answered by: Nan Hampton

QUESTION:

I have fast growing plants (weeds?) in my heavily wooded backyard. They reach heights of over 6 ft and have orange flowers. I have spent hours searching the web today with no success -the closest thing I found that resembles these plants are in the Mallow family. They are nearly impossible to get rid of and they multiply fast. I have images I can forward to assist. Thank you!

ANSWER:

Below are various "weeds", some native and some not, that are similar to your description and occur in Ohio.

Oenothera biennis (Common evening-primrose) is native to North America.  Here are more photos and information from Ohio Perennial & Biennial Weed Guide.

Hieracium aurantiacum (Orange hawkweed) is native to Europe.  Here is more information from Ohio Perennial & Biennial Weeds.

Abutilon theophrasti (velvetleaf) is native to Asia.  Here is more information from University of California Integrated Pest Management Program.

Impatiens capensis (Jewelweed) is native to North America.  More photos and information from Illinois Wildflowers.

Campsis radicans (Trumpet creeper) is a vine with orange flowers and native to North America.  Here is more information from Ohio Perennial & Biennial Weed Guide

Verbascum blattaria (Moth mullein) is native to Europe, Asia, and northern Africa.  Here are more photos and information from Ohio Perennial & Biennial Weed Guide and CalPhotos University of California-Berkeley.

Verbascum thapsis (Common mullein) is native to Europe, Asia, and northern Africa.  Here are more photos and information from Ohio Perennial & Biennial Weed Guide.

Hemerocallis fulva (Tawny daylily) is native to Asia.  Here is more information from the National Park Service.

Potentilla recta (Sulfur cinquefoil) is native to Eurasia.  Here is more information from Illinois Wildflowers.

If none of these are the weeds that are growing in your backyard, you should try looking through the Photo Key on Ohio Perennial & Biennial Weed Guide.  You can also go to our Native Plant Database and do a COMBINATION SEARCH choosing "Ohio" from Select State or Province and "Orange" from Bloom Characteristics: Bloom Color.  This will give you a list (most have photos) of North American native plants with orange flowers that occur in Ohio.  If you still don't find your weed, please visit our Plant Identification page to find links to several plant identification forums that will accept photos of plants for identification.

Below are photos of the North American natives named above.

 

 

From the Image Gallery


Common evening-primrose
Oenothera biennis

Common evening-primrose
Oenothera biennis

Common evening-primrose
Oenothera biennis

Jewelweed
Impatiens capensis

Jewelweed
Impatiens capensis

Trumpet creeper
Campsis radicans

Trumpet creeper
Campsis radicans

More Invasive Plants Questions

Invasive thistles in wildflower field from Dripping Springs TX
February 17, 2014 - How to get rid of "native" thistles.. I have a large natural field that used to grow a variety of wildflowers, but in 2011 and 2012 it was taken over by thistles. I'm sure they are "native" Texas...
view the full question and answer

Sandbur invasion in Mission TX
June 08, 2011 - I have a spiny sandbur invasion in my yard. Even the dog tiptoes around to do her business. Because I live in Mission, TX, this weed acts like a perennial and is constantly growing (no winter freezes...
view the full question and answer

Identification of plant with orange sap that glows at night
June 06, 2012 - I was just pulling up a plant and noticed that its sap was a kind of orange then I noticed it glowing orange at night. What kind of plant is this and is it dangerous?
view the full question and answer

Controlling Thermopsis rhombifolia (buffalo bean) in Mozambique
May 19, 2009 - Dear Mr. Smarty, Please,can you assist. We have a plot on a dam in Mozambique. It has been invaded with Thermopsis rhombifolia (we call it buffalo bean), it is very hardy and if you fall in it or j...
view the full question and answer

Nutgrass
September 12, 2008 - Hey Hi Barbara, I just read the information you gave about nut grass. I had wished for other options. Back to digging them out. Thanks for the information What about substituting cud zoo. S...
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