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

Thursday - February 15, 2007

From: Buda, TX
Region: Southwest
Topic: Trees
Title: Differentiating between Iles decidua and Ilex vomitoria
Answered by: Nan Hampton

QUESTION:

Is there any way to tell a male possum haw holly from a female? I have a possum haw that never lost all of it's leaves and has no berries. Could it be a male?

ANSWER:

First of all, Possumhaw (Ilex decidua) and Yaupon (Ilex vomitoria) look very similar, except that yaupon is evergreen. Perhaps you have a yaupon tree and that is why your tree still has leaves. Both trees are dioecious (having flowers with male structures and flowers with female structures on separate trees).

Although there could be reasons a female plant would not produce berries (e.g., no male trees near enough to provide pollen or some environmental cause such as a late freeze or heavy rains), there is a good chance that you have a male tree since you had no fruit. However, you need to see the flowers to tell for sure. The male flowers have functional stamens producing pollen. The female flowers have stamens that produce no pollen. Even though they are dioecious plants, they aren't always completely so. The female flowers generally have nonfunctioning stamens, but sometimes you will find perfect flowers—those with both a functioning pistil and also with stamens producing pollen.

You can see drawings of male and female flowers of possumhaw and yaupon on the USDA Plants Database. Note that the female flower has an enlarged ovary and stamens that are slender with no pollen. The male flowers have stamens that are fully developed with pollen. You can look at the blossoms in the spring (March, April, May) when both trees bloom to determine whether your tree is male or female.

 

More Trees Questions

Buds disappearing from magnolia in New Jersey
February 04, 2012 - I live in New Jersey.I planted my 5.gal Vulcan magnolia in December. It came with 4 big buds and 3 small buds.I planted in good location where it gets lots of sun. The tree is well settled and looked ...
view the full question and answer

Sticky film on oak tree leaves from Whitney TX
September 04, 2012 - What is the sticky film that is coating leaves on our oak trees?
view the full question and answer

Removing grass under oak trees in Pflugerville TX
August 30, 2009 - I would like to use the newspaper-and-mulch method to smother grass under the canopy of live oaks, a bur oak, and a lacey oak so that I can plant natives that will thrive there. However, I'm concern...
view the full question and answer

Tree for area around patio in East Texas
December 31, 2008 - What is the best type of tree to plant around my patio which faces the southeast
view the full question and answer

Damage from Hurricane Irene in Burgaw, NC
August 27, 2011 - We live in Burgaw, NC and have begun the clean up efforts of Hurricane Irene which has made a full grown crape myrtle lean to one side. Its a very large tree and it is not uprooted. Is there anyway ...
view the full question and answer

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