Rent Shop Volunteer Join

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

Monday - September 17, 2012

From: Austin, TX
Region: Southwest
Topic: Plant Identification, Herbs/Forbs
Title: Identity of plant with white flowers and serrated leaves in creek bed
Answered by: Nan Hampton

QUESTION:

I have a wild fall blooming plant, white flowers, serrated leaves. Growing abundantly in my dry creek bed. Any thoughts?

ANSWER:

My best guess is that it is either Ageratina havanensis (Havana snakeroot or shrubby boneset) or Ageratina altissima var. altissima (White snakeroot).   Here are more photos and information about A. havanensis from the School of Biological Sciences, University of Texas and Flora of North America and here is more about A. altissima var. altissima from Native and Naturalized Plants of the Carolinas & Georgia and Flora of North America.

If neither of these looks like your plant and you have (or can take) photos of it, please visit our Plant Identification page to find links to several plant identification forums that will accept photos of plants for identification.

 

From the Image Gallery


Shrubby boneset
Ageratina havanensis

Shrubby boneset
Ageratina havanensis

Shrubby boneset
Ageratina havanensis

White snakeroot
Ageratina altissima var. altissima

White snakeroot
Ageratina altissima var. altissima

White snakeroot
Ageratina altissima var. altissima

More Herbs/Forbs Questions

Black-eyed Susans in potting soil on ground
November 12, 2010 - I would like to know if black eyed susans can be planted in just potting soil instead of mixing it in with dirt from the ground? I don't want to leave it in the pots. I want to plant it, but the grou...
view the full question and answer

Disease-resistant squash varieties for Central Texas
February 03, 2008 - Can you give me names of some disease-resistant summer squash varieties available in Central Texas?
view the full question and answer

Flowering native plants for Evanston IL
July 12, 2009 - What flowering, native plants would be suitable for a backyard garden in Evanston Illinois?
view the full question and answer

Insects attacking Gregg's Blue Mistflower from Comfort TX
June 20, 2013 - I have a beautiful stand of Gregg's Blue Mist flower that have been attacked by an unknown insect. The new growth is curled and stunted and it is not flowering. I'm not alone..I've seen the Gregg'...
view the full question and answer

Plant Database for New Jersey
February 19, 2015 - How can I find out where certain plants will grow, for example, will Indian Mustard (Brassica juncea L.) grow in New Jersey?
view the full question and answer

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