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

Saturday - October 03, 2009

From: Gloucester, VA
Region: Mid-Atlantic
Topic: Poisonous Plants
Title: Are leatherleaf viburnum or Carolina Sapphire toxic to horses?
Answered by: Nan Hampton

QUESTION:

Are Leather-leaf Viburnum or Carolina Saphire toxic to equine? I would like to plant them near the fence line.

ANSWER:

Mr. Smarty Plants found neither Cupressus arizonica var. glabra (Carolina Sapphire), a cultivar of Cupressus arizonica (Arizona cypress) that was developed at Clemson University, nor Viburnum rhytidophyllum (leatherleaf viburnum), a native of China, listed in any of the toxic plant databases listed below:

Poisonous Plants of North Carolina

Cornell University Plants Poisonous to Livestock

Toxic Plants of Texas 

University of Pennsylvania Poisonous Plants

Canadian Poisonous Plants Information System

Toxic Plants: Horses from the ASPCA

This doesn't guarantee that the plants are not toxic to horses, but it is a pretty good indication that they are safe.

As an alternative for the non-native leatherleaf viburnum from China, Mr. Smarty Plants would like to suggest several species of viburnum that are native to Virginia. Here are several recommendations:

Viburnum acerifolium (mapleleaf viburnum)

Viburnum dentatum (southern arrowwood)

Viburnum nudum (possumhaw)

Viburnum prunifolium (blackhaw)

Viburnum rufidulum (rusty blackhaw)


Viburnum acerifolium

Viburnum dentatum

Viburnum nudum

Viburnum prunifolium

Viburnum rufidulum

 

 

 

More Poisonous Plants Questions

Non-native astilbe resemblance to non-native poisonous castor bean from Tomslake BC
May 21, 2014 - I have a plant that looks like a castor bean but it has flowers like a Younique Silvery Pink Astilbe. Need to id because castor bean is poisonous. This plant grows up to 5 feet in height. Thank you !
view the full question and answer

Native plants that will grow under alleopathic black walnut
March 03, 2007 - I have a large, beautiful black walnut tree in my yard and have trouble growing the annuals, begonia, impatients, etc., that I have always grown. They don't do well in the ground and I have resorted...
view the full question and answer

Datura in the state of Washington.
October 09, 2009 - I have a datura species growing beneath my bird feeder. How did it get here in Western Washington?? It has the typical fragrant, tubular flowers & spiky seed pods. It has grown 3' tall & 4' wide. Am...
view the full question and answer

Plant identification of tree in North Carolina
September 07, 2011 - I live in North Carolina have found a tree on our property that has thorny branches and round fruit (perfectly round) with a fuzzy outer layer that starts out green but then turns yellow. The inside r...
view the full question and answer

Plants safe for donkeys in Foristell MO
August 22, 2009 - I am looking for a plant that can grow next to a farm fence, preferably the length of the fence approx 75 ft. in a long row, one that miniature donkeys can safely eat, if they so choose. I like your ...
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