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

Tuesday - April 22, 2003

From: Austin, TX
Region: Southwest
Topic: General Botany, Invasive Plants
Title: Definition of a weed
Answered by: Stephen Brueggerhoff

QUESTION:

What is your definition of a weed?

ANSWER:

My definition of a weed encompasses the natural distribution range of a particular plant, as well as growth habit. Generally, a plant is determined "weedy" if it has a habit of creating a monoculture and effectively removing or reducing populations of naturally occurring flora. Weeds can be either native or non-native plants. Native plants are plants that naturally occur in a given location without accidental or intentional introduction by humans. Plants that are native to other places and have been introduced to locations out of their natural range are called exotics. These plants, in turn, are then declared invasive when they exhibit characteristics described above. Additionally, native plants that are introduced/grow out of their naturally distributed range, can become invasive as well.

 

More Invasive Plants Questions

Identity of plant in Kentucky with fuzzy grayish-green leaves
September 03, 2012 - I would like to know about a plant that I do not know what it is. I had this plant just come up in my flowerbed, that looked like a tobacco plant but the leaves looked like a lambs ear plant. It was ...
view the full question and answer

Identity of invasive vine in The Woodlands, Texas
December 02, 2013 - What is the invasive vine covering trees in The Woodlands, Texas?
view the full question and answer

The invasiveness of Lupinus arboreus
January 23, 2009 - Hi, Researching Lupinus arboreus, I found that it is considered a serious invasive in Northern California coastal areas, especially Humbolt Bay. Scotch broom, of course, is an awful pest on the coast...
view the full question and answer

Information about invasive Paulownia tree
September 22, 2008 - What genus and species and family is this Royal Paulownia tree I hear about? Is it Elm? Linden? Dogwood? Is it a weed? thank you
view the full question and answer

Removal of poison ivy by goat in Lone Jack MO
May 29, 2009 - Easy organic removal of poison ivy?? I bought a goat, but you can borrow a neighbors. Always get 2 as they get lonely. They love to eat poison ivy, pull up vine roots and all, and leave the grass.
view the full question and answer

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