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
1 rating

Thursday - May 14, 2009

From: Sierra Vista, AZ
Region: Southwest
Topic: Invasive Plants
Title: Why is Asphodelus fistulosus (onionweed) forbidden by property owners assoications?
Answered by: Nan Hampton

QUESTION:

Our local property owners association is imploring us to remove all onionweed (Asphodelus fistulosus L.). The USDA lists it as a noxious weed. Why? I think it is pretty and flowery. Is it poisonous, hallucinogenic, or what? Thank you.

ANSWER:

Asphodelus fistulosus (onionweed) is an invasive, non-native from southern Europe, Mediterranean Africa and western Asia.  On the webpage for the Center for Invasive Species and Ecosystem Health you can find links to several noxious plant lists on which it appears.  It is very aggressive in propagating itself and has few, if any, predators since it is unpalatable to cattle and most wildlife.  You can read more about its status in Arizona from the Arizona-Sonora Desert Museum's Invaders of the Sonora Desert Region page.  The Tonto National Forest in Arizona also has a page devoted to the onionweed.  Mr. Smarty Plants says "thanks" to the local property owners association for helping to protect the environment from this aggressively invasive non-native plant.
 

More Invasive Plants Questions

Mexican feathergrass from Pflugerville, TX
January 23, 2013 - How deep are the roots of Nassella tenuissima? I'm looking for something that could possibly discourage my neighbors' bermuda grass from encroaching into my native plantings.
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

Are These Plants Natives for Flower Mound, Texas?
September 24, 2010 - We are having our flower beds reworked and these are the plants that the company is recommending to plant. I would like to know if these plants are native to our area:pink muhly grass, lythrum, lorope...
view the full question and answer

Destruction of Straggler Daisy in Austin
December 18, 2011 - I hate Straggler Daisy. Not to be offensive, but it appears from other posts on this site that you, Mr. Smarty Plants, and many others would like to treat it as a protected species. It is taking over ...
view the full question and answer

Pruning of non-native Senna bicapsularis from Ocean Springs MS
April 04, 2013 - I have 4 Senna plants (cassia bicapsularis) that I planted late last spring. They about 3-4 feet tall but are very gangly with leaves at or near the tips only. How should I prune them to encourage g...
view the full question and answer

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