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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.

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Ask Mr. Smarty Plants is a free service provided by the staff and volunteers at the Lady Bird Johnson Wildflower Center.

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Sunday - May 31, 2009

From: Ashtabula, OH
Region: Midwest
Topic: Trees
Title: Are white pine trees toxic to horses?
Answered by: Nan Hampton

QUESTION:

Are white pine trees toxic to horses?

ANSWER:

A quick search through the poisonous plant databases listed below found only pine tree species, Pinus ponderosa (ponderosa pine), on any of the lists.  None of the pines with the common name that includes 'white pine' (see below) was on any of the lists so I think we can assume that white pine will not be dangerous for your horses.  You might keep these databases in mind for any other plants you are concerned about for your horses—or yourself.

WHITE PINES:

Pinus strobus (eastern white pine) has a distribution that includes Ohio.

Pinus monticola (western white pine) has a distribution limitied to western North America.

Pinus strobiformis (southwestern white pine) has a distribution in Texas, New Mexico, Arizona and Colorado.

POISONOUS PLANT DATABASES:

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

SPECIFIC TO HORSES:

10 Most Poisonous Plants for Horses from EquiSearch.com

Poisonous Plants from Trailblazer Magazine

Toxic Plants: Horses from the ASPCA

Horse Nutrition: Poisonous Plants from Ohio State University

 

 

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