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
1 rating

Sunday - July 14, 2013

From: Spring, TX
Region: Southwest
Topic: Herbs/Forbs
Title: Is blue porterweed native to North America from Spring TX
Answered by: Barbara Medford

QUESTION:

I recently purchased a blue porterweed (Stachytarpheta jamaicensis) plant from the native plant section of one of our local nurseries. I was surprised when I didn't find it on your list of native plants. Many Google searches show it as a native, while others show it to be an Asian exotic.

ANSWER:

You are correct, our ultimate source for determining nativity is the USDA, and this USDA Plant Profile Map shows Blue Porterweed (Stachytarpheta jamaicensis) as native to the lower 48 states, Puerto Rico and the Virgin Islands but introduced in Hawaii. This can be attributed to many things, but mostly to the fact that our Native Plant Database is alway a work in progress. We are much more embarrassed when we learn that we have listed a non-native as native than we are when it is the other way around, but still, we appreciate your bringing it to our attention.

The USDA source listed above shows it native to Alabama and Florida, so we are a little curious as to why it was being sold as a native plant in a nursery near Houston. Our whole point in advocating native plants is that there are many multiples of different growing conditions in North America - soils, temperatures, rainfall, even the length of daylight. When we answer a question about a specific plant, we always first check to see where that plant evolved and grows naturally, in order to warn our visitor if we don't think it can survive where they are gardening. 

To that end, we will do a little research on the Internet and you can read some of the information we find to determine if you can expect it to do well in Harris Co., TX.

A lot of user comments from the forum Dave's Garden on this plant. Natives for your neighborhood, a conservation website for south Florida. The Leon Levy Native Plant Database -  oops, that's from the Bahamas. "Native" is in the eye of the beholder.

 

More Herbs/Forbs Questions

Native Plants for a Steep Slope in TN
July 15, 2014 - Hello, I live in Knoxville, TN and have a very steep slope in our backyard. There is a lot of water erosion causing our grass to be covered with red dirt. I would love to try to plant something on thi...
view the full question and answer

Dividing non-native daffodils from Austin
April 15, 2012 - The foliage on my daffodils is lush and healthy, but I have no blooms. Should I divide them?
view the full question and answer

Transplant shock in Texas Star hibiscus
July 31, 2008 - Why is my Texas star plant wilting and now is starting to turn yellow? I just bought it from a nursery and put it in a new pot.
view the full question and answer

Container plants for Yakima WA
May 11, 2013 - My condo complex has purchased large, pottery pots for around our pool. I need to choose low maintenance plants. hopefully something that takes limited water, etc.
view the full question and answer

Container plants for part shade in Bee Cave TX
June 18, 2013 - Dear Mr Smarty Pants, I am looking for plants that will thrive on my covered porch in 3 tall planters. These are meant to help me block an unattractive view out my living room window, so they must...
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