Arceuthobium douglasii Engelm.
Douglas Fir Dwarf Mistletoe, Douglas-fir Dwarf Mistletoe
Viscaceae (Christmas Mistletoe Family)
USDA Symbol: ARDO
Tiny, branching, olive to dull blue-green or orange-green growths with bud-like tips on tree limbs.
This parasitic plant grows long thread-like roots inside tree branches, inflicting slow death. It is conspicuous only in causing host trees to branch into dense vertical witches brooms. It is most common on upper branches, but occasionally is visible near eye level.
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Plant CharacteristicsDuration: Perennial
Leaf Arrangement: Alternate
Leaf Complexity: Simple
Leaf Margin: Entire
Breeding System: Dioecious
Inflorescence: Spike , Terminal
Fruit Type: Berry
Leaf: Brownish green.
Fruit: Olive green.
Size Class: 0-1 ft.
Bloom InformationBloom Color: Red , Purple
Bloom Time: Mar , Apr , May
Bloom Notes: Staminate flowers: 2.3 mm in diameter, tepals 3(-4), reddish-purple; Pistillate flowers: 1.5 mm in diameter.
DistributionUSA: AZ , CA , CO , ID , MT , NM , NV , OR , TX , UT , WA , WY
Native Distribution: British Columbia and Alberta south throughout western United States to California and Texas.
Native Habitat: Conifer limbs.
Additional resourcesUSDA: Find Arceuthobium douglasii in USDA Plants
FNA: Find Arceuthobium douglasii in the Flora of North America (if available)
Google: Search Google for Arceuthobium douglasii
MetadataRecord Modified: 2007-01-01
Research By: TWC Staff