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
3 ratings

Thursday - August 29, 2013

From: Junction, TX
Region: Southwest
Topic: General Botany, Non-Natives, Plant Identification, Trees
Title: What are the differences between Arbutus xalapensis, A. unedo and A. marina
Answered by: Nan Hampton

QUESTION:

One nursery lists madrone trees as arbutus uneda compacta and arbutus marina. The other lists it as arbutus xalapensis, which is the only name I can find in the data base. There is a very large price difference. How are the plants alike and different? Thank you.

ANSWER:

Our Native Plant Database contains only plants native to North America.  Arbutus xalapensis (Texas madrone) is native to Texas and New Mexico and occurs in our database.  Neither of the other two Arbustus species is native to North America.  Arbutus unedo is introduced tree from Ireland and Southern Europe.  Arbutus unedo 'Compacta' is a dwarf version of this tree.  Arbutus 'Marina' is most likely a hybrid between two Arbutus species.   It's origin is somewhat of a mystery; but as a hybrid, it is not considered a native plant.  Here is a discussion of it from Sonoma County Master Gardeners (California).

 

 

More General Botany Questions

Are Native Cultivars As Beneficial to Wildlife?
September 02, 2015 - I am working on adding more native plants to my small acreage. I would like to know if using a selection or cultivar of a native species is as likely to have wildlife benefits as using a randomly prop...
view the full question and answer

Taxonomy question concerning the Family Commelinaceae
June 17, 2014 - Hi I have a question. Many people refer to plants differently, I have always used the Genus and species and rarely the family name..it is very confusing .. when a professional uses a name that is a co...
view the full question and answer

Effect of epsom salts and gray water on plants
December 04, 2007 - We live in Phoenix where water is a precious commodity. We have decided to use as much of the gray water as we can for watering our garden, shrubs and trees. One of the suggestions we heard about w...
view the full question and answer

Plants for soils with extreme pH values
May 24, 2009 - I am doing a project on acid and alkaline on the ph scale but all I can find is a range of 5.0 to 8.0. Do they have plants in the range of 8.0 to 14.0 or 1.0 to 5.0? If not, why is that? If so, what a...
view the full question and answer

Disappearing sunlight in Phoenix, AZ
September 29, 2009 - I live in a condo in Phoenix, AZ with a north facing patio that goes out about 10 feet and is 20 feet wide. During the summer months there is a span of 1 foot in the front that goes the 20 foot length...
view the full question and answer

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