1. Mistletoe
By Paige Heilman

2. Common Information 1300 species
The Dwarf Mistletoe (Arceuthobium pusillum)
The American Mistletoe
Hemi-parasites
Yellowish, white
“Dung on a twig”

3. Life Cycle

4. Symptoms
Branch swelling
Upper tree leaf loss
Witch’s brooms

5. Effects
Top kill of trees Stunt in growth Death of trees Distortions of limbs

6. Prevention
Pruning and removing trees
Ethephon
Clear cut

7. Ponderosa Pine Dwarf Mistletoe
Arceuthobium camylopodum
Ponderosa pines and Lodgepole pines
Fan-like branches
Shoot height 3-8 cm
Western Region

8. Lodgepole Pine Dwarf Mistletoe
Arceuthobium americanum
Lodgepole pine, ponderosa pine, whitebark pine
Shoot height 5-9 cm
Montana, Colorado, and Wyoming
Whorl-like branching

9. Douglas Fir Dwarf Mistletoe
Arceuthobium douglasii
Douglas fir and Douglas white fir
Shoot height 2 cm
Fan-like branching
Western region

10. Limber Pine Dwarf Mistletoe
Arceuthobium cyanocarpum
Limber pine, lodgepole pine, ponderosa pine, southwestern white pine
Fan-like branching
Shoot height 3 cm
Western except Washington

11. Hemlock dwarf mistletoe
Arceuthobium tsugense
Western hemlock
Fan-like branching
Oregon, Washington, and north Californina
Shoot height 3 cm

12. Works Cited
Puckett, Catherine. "Not Just for Kissing: Mistletoe and Birds, Bees, and Other Beasts." U.S. Geological Survey. USGS. October, Web. 26 Nov < Hennon, Paul. "Hemlock Dwarf Mistletoe." U.S Forest Service. U. S. Department of Agriculture, n.d. Web. 26 Nov <

13. Works Cited Continued
Koski, R.D. "Mistletoes in Colorado Conifers." Colorado State University Extension. N.p., Web. 26 Nov <