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From: Coulee City, WA
Region: Northwest
Topic: Trees
Title: Native trees for horse pasture in eastern Washington
Answered by: Nan Hampton
Betula occidentalis (water birch)
Celtis laevigata var. reticulata (netleaf hackberry)
Cornus sericea ssp. sericea (redosier dogwood)
Juniperus scopulorum (Rocky Mountain juniper)
Populus tremuloides (quaking aspen)
Populus balsamifera ssp. trichocarpa (black cottonwood) and photos
Pseudotsuga menziesii (Douglas-fir)Salix exigua (narrowleaf willow)
Salix scouleriana (Scouler's willow)
None of the species above appear on any of Mr. Smarty Plants favorite toxic plant databases:
Universtiy of Pennsylvania's Poisonous Plants Database, Poisonous Plants of North Carolina, Cornell University's Plants Poisonous to Livestock and other Animals, Canadian Poisonous Plants Information System and Texas Toxic Plant Database.
However, the following native trees from the Grant County list do appear on the Cornell University's Plants Poisonous to Livestock and other Animals and should not be included in your pasture for horses:
Pinus ponderosa (ponderosa pine)
Prunus virginiana (chokecherry)
Prunus emarginata (bitter cherry)
Additionally, here are several databases that list plants, native and otherwise, that should not be included in areas with 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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