En Español

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
5 ratings

Friday - March 26, 2004

From: Washington, DC
Region: Mid-Atlantic
Topic: Invasive Plants
Title: Smarty Plants Exotic Species
Answered by: Jil M. Swearingen, National Park Service

QUESTION:

What is an Exotic Species?

ANSWER:

An organism is considered exotic (alien, foreign, non-indigenous, non-native) when it has been introduced by humans to a location(s) outside its native or natural range. This designation applies to a species introduced from another continent, another ecosystem, and even another habitat within an ecosystem.

For example, black locust (Robinia pseudoacacia), a tree that is native to the southern Appalachian region and portions of Indiana, Illinois and Missouri, was planted throughout the U.S. for living fences, erosion control, and other uses for many years. Black locust is considered exotic outside its natural native range because it got there by human introduction rather than by natural dispersal. Another example is saltmarsh cordgrass (Spartina alterniflora), a wetland plant that is native to eastern North American estuaries. Saltmarsh cordgrass was introduced to western North American shoreline habitats, where it did not occur previously. It has established and become a serious invasive species, displacing native species and adversely impacting wetland communities.

European settlers brought hundreds of plants to North America from their home lands for use as food and medicine, and for ornamental, sentimental, and other purposes. Introductions of exotic plants continue today and are greatly increasing due to a large and ever-expanding human population, increased international travel and trade, and other factors.
 

More Invasive Plants Questions

How to tell the difference between native and European thistles
April 19, 2011 - How can I tell the difference between invasive (European) thistles and thistles that are native to Texas? And what is the best way to eradicate the invasive varieties?
view the full question and answer

Pruning drought-stressed butterfly plants from Kerrville TX
August 22, 2011 - Due to the drought, our butterfly bushes have dead branches. Ordinarily we prune the dormant plants in winter, but can we cut back dead branches now?
view the full question and answer

Smarty Plants on native plants
March 26, 2004 - What is a native species?
view the full question and answer

Controlling non-native Pennisetum frutescens (Naked fountain grass)
December 07, 2014 - Three years ago I bought a pennisetum frutescans grass from a reputable online nursery. It gets no supplemental water, but it is taking over my yard. It is almost 7 feet wide now. Can you tell me how ...
view the full question and answer

Need care instructions for Cardiosperma halicacabum in Little Rock, AR>
May 11, 2012 - I'd like to find out how to cultivate & care for a balloon vine/heart seed vine/love in a puff vine which I found growing wild in my yard (in Little Rock, Arkansas). There seems to be very little in...
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 | JOBS | SITEMAP | STAFF INTRANET
© 2016 Lady Bird Johnson Wildflower Center