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

Tuesday - August 18, 2009

From: Palo Pinto, TX
Region: Southwest
Topic: Invasive Plants
Title: Plant identification, Cuscuta sp., Dodder
Answered by: Nan Hampton

QUESTION:

A neighbor of mine has a vine with no leaves that is attaching itself to her flowering plants. It is yellow in color, just larger than fishing line and has no leaves. It corkscrews itself around the plant and then it seems to almost tie a knot in itself and then on to another plant. We would like to know what it is and how to eliminate it. Thank you from Palo Pinto, Texas

ANSWER:

This is a dodder (Cuscuta sp.) and is a parasitic flowering plant.  It grows from a seed and after it has emerged it must search for a host or it will die since it has no chlorophyll for producing its own food.  Once it finds a host it attaches itself to its plant host via rootlike structures called haustoria. These allow the dodder to extract nutrients and water from its host.  After the dodder is connected to its host it loses contact with ground get all its nutrients and water from the host.  The host plant doesn't usually die but it can be weakened.  You can read an interesting discussion of dodders from Collin Purrington, a researcher at Swarthmore College.  Here are some native dodders that are known to occur near Palo Pinto County:

Cuscuata indecora (Bigseed alfalfa dodder)

Cuscuta pentagona (fiveangled dodder)

You can see distribution maps for other dodders that occur in Texas and the US, both native and introduced, in the USDA Plants Database

The two introduced dodders that have been found in Texas are Cuscuta japonica (Japanese dodder) and C. suaveolens (fringed dodder)C. japonica (also known by the common name, giant Asian dodder) has been identified as being a serious invasive pest in the Houston area and is listed as a Federal Noxious Weed.  You can read recommendations for eradication strategies for this dodder from Texas Invasives.org.  There is no way I can identify for certain which of the Cuscuta sp. your neighbor has without seeing photos of it, but these eradication methods should work for any Cuscuta sp.

 

 

 

More Invasive Plants Questions

Help for restoring landscape to indigenous native plants
November 05, 2007 - I have inherited some acres in Robertson County (Texas) which is about 40 miles north of Bryan/College Station. I would like to restore the landscape to the indigenous native plants without just lett...
view the full question and answer

Planting time for non-natives in Irving TX
February 07, 2012 - Have dwarf nandinas and two lorapetalums that I want to transplant. Can I do it now February 6th 2012?
view the full question and answer

Non-native, and/or invasive bermudagrass, St. Augustine and Pistache from Houston
September 24, 2012 - Our St. Augustine lawn died suddenly this summer from either chinch bugs or grub worms (or both?), and a multitude of weeds and native Bermuda have taken over the area. Now that the weather has cooled...
view the full question and answer

Identification of yellow flowers in Wisconsin
June 19, 2012 - We have plants near Madison, Wisconsin that some call lanceleaf coreoposis however I believe they are some type of invasive species. They have yellow flowers, seem to spread by seed. and don't grown ...
view the full question and answer

Bald cypress causing problems in Spring TX
June 22, 2010 - There is a 50+ ft Bald Cypress growing near my property line. While the tree has grown substantial knees along the driveway and some as far as 35 ft from the tree in my flower beds, I do not see any d...
view the full question and answer

Smarty Plants's Facebook profile Support the Wildflower Center by Donating Online or Becoming a Member today.

Mr. Smarty Plants wants you to be his Facebook friend. Click the Facebook icon to add yourself to Mr. Smarty Plants list of friends.
E-NEWSLETTER | BECOME A MEMBER | DONATE NOW | MEDIA | SITEMAP
© 2014 Lady Bird Johnson Wildflower Center