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

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 Plant Identification Questions

Plant Identification
October 23, 2008 - We live near Milwaukee Wisconsin. This summer a 5' plant grew by itself in the middle of my flower bed. It has elongated oval green leaves, but its the flowers that are exceptional. They are long,...
view the full question and answer

Identification of orange hydrangea-like flower
April 19, 2008 - I am trying to identify a tree...It is a tree like bush if that makes any sense...It has tree limbs and it is bushy like a bush...I thought it might be a hydrangea bush that grows straight up instead ...
view the full question and answer

Identification of plant with small lilac flowers in Laredo
May 14, 2013 - Need help identifying the following: small lilac flowers in a cluster with seed pods, unpleasant scent which can be up to 3 feet tall ..wild flower or weed? am interested if it attracts hummingbirds...
view the full question and answer

Plant identification, orange honeysuckle
December 14, 2009 - I have two potted trees in my yard. They have honeysuckle-shaped, orange flowers that bloom year long and the leaves also resemble those of honeysuckle. There were no identification tags on them whe...
view the full question and answer

Plant ID from Villa Hills KY
April 21, 2013 - Hello I have this plant but I don't know what it is. I want to know if it's edible or what it is. I think it's catnip.
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