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

Friday - December 28, 2007

From: Austin, TX
Region: Southwest
Topic: Trees
Title: Inflorescence of the American sycamore (Platanus occidentalis)
Answered by: Nan Hampton

QUESTION:

What kind of flower inflorescence do sycamores have?

ANSWER:

The flowers on Platanus occidentalis (American sycamore), unlike the familiar fruits, are small and inconspicuous. The trees are monoecious, i.e., both male and female flowers, although on different stalks, are together on the same tree. Here is a description of the flowers from the Alabama Forestry Service:

"FLOWERS: Appear on the growth of the season when the leaves are about l/4 developed,
monoecious, borne in capitate heads, staminate and pistillate flower heads on different
stalks; staminate are axillary and dark red; pistillate terminal, greenish, often tinged with
red."

You can see more photos of P. occidentalis, from Ontario Trees & Shrubs.
 

More Trees Questions

Ornamental plants for under live oaks
September 08, 2008 - What ornamental plant will do well under Live Oak trees?
view the full question and answer

When do bigtooth maples (Acer grandidentatum) seeds mature and fall?
December 04, 2009 - Hello, In answer to a previous question, you said that Bigtooth Maple samaras come ripe around August-September. Recently, I went to Lost Maples State Natural Area, and in their display, it says...
view the full question and answer

Ecosysystem with pecan at center from Austin
February 21, 2014 - Dear Mr. Smarty Plants, I would like to create a native tree guild around a mature pecan. It shares its space with native shrubs and ephemerals but I would like to add a nitrogen fixing plant. I am...
view the full question and answer

Plants for north side from Dale TX
February 10, 2012 - What native trees and bushes can I plant on the north side of house? Can I use corn meal( I NEED FIGHT A GRASS) in flowerbed and then plant native wildlife seeds(FLOWERS)?
view the full question and answer

Fruit trees for South Austin.
January 25, 2008 - I live in South, South Austin, just a pinch West of 35 near 1626. I would like to plant some fruit trees in the back yard. Anyone will sell fruit trees, but they don't always grow. What fruiting var...
view the full question and answer

Support the Wildflower Center by Donating Online or Becoming a Member today.
E-NEWSLETTER | BECOME A MEMBER | DONATE NOW | MEDIA | SITEMAP | STAFF
© 2016 Lady Bird Johnson Wildflower Center