Host an Event Volunteer Join Tickets

Support the plant database you love!

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

Sunday - November 13, 2011

From: Austin, TX
Region: Southwest
Topic: Plant Identification
Title: Identity of large, sunflower-like plant
Answered by: Nan Hampton

QUESTION:

We are trying to figure out the identity of a large, sunflower-like plant. It is a perennial that sends out approximately 10-12 stalks about 10 feet high. It then starts to bloom with small sunflower-like flowers starting from the top and over a few weeks, working all the blossoms down the stem. Any ideas?

ANSWER:

Mr. Smarty Plants has thought a lot about this and has made a few assumptions that may or may not be right, but they are:

  1. The plant is in Texas.
  2. It is growing in the wild and not a cultivated plant growing in someone's garden.
  3. It was blooming in October.

If those assumptions are correct, here are a few possibilities: 

I think the most likely match is Helianthus maximiliani (Maximilian sunflower).  Here are more photos.

Two more large sunflowers bloom in October in Texas:

Helianthus annuus (Common sunflower), but the flowers are large and bloom singly on a stem.

Helianthus argophyllus (Silverleaf sunflower) presents the same problems as the common sunflower.

Another large yellow-blooming plant that is seen around Austin at this time of the year is Tecoma stans (Yellow bells)—not a member of the Family Asteraceae (Aster Family), but in the Family Bignoniaceae (Trumpet Creeper Family).

If none of these is the plant you have seen and you have photos, please visit our Plant Identification page where you will find links to plant identification forums that will accept photos for identification.

 

From the Image Gallery


Maximilian sunflower
Helianthus maximiliani

Maximilian sunflower
Helianthus maximiliani

Maximilian sunflower
Helianthus maximiliani

Maximilian sunflower
Helianthus maximiliani

More Plant Identification Questions

Identification of plant in Illinois
August 13, 2007 - I've found a plant that I cannot identify. The plant is is very short, 2 inches tall maybe, and has very fragile, thin leaves and stem. The leaves about 1" long, are pinnate, with about 20 leaflets ...
view the full question and answer

Identification of a vine with 3 leaves and a red trunk
January 02, 2014 - What is a vine with 3 leaves that has a red trunk?
view the full question and answer

Orange-flowered bush on Wildflower Center grounds
April 19, 2015 - What is the orange colored bush like Sphaeralcea blooming right now. It is in one of the planted gardens. I could find no name plate.
view the full question and answer

Identification of plant known as mosquito plant (Agastache cana)
October 11, 2007 - I received some seeds from an annual plant that came from Bowie, Tx. It has square stems, like mint plants, medium size leaves turns purple when in the sun and had a strong odor when brushed against. ...
view the full question and answer

Plant identification
July 28, 2010 - I am trying to identify a plant that was given as a gift.It is growing outside in a pot, it is about 20 inches tall. Has green leaves on top, purple underneath and lovely purple flowers. Seems to lik...
view the full question and answer

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