Page author: Don Knoke
Arceuthobium douglasii
Douglas-fir dwarf-mistletoe

Distribution: British Columbia to California, east to Montana and New Mexico.

Habitat: On the branches of Pseudotsuga menziesii.

Flowers: May - June

Origin: Native

Conservation Status: Not of concern


Small, glabrous, monoecious shrubs parasitic on the branches of Pseudotsuga menziesii, the stems greenish or bluish-green, 0.5-3 cm. long, the segments 1 mm. thick and 3- to 6- times as long; accessory branches, when present, in one plane, fan-like.


Leaves none, reduced to small, opposite scales.


Staminate flowers paired at the nodes, terminal on short, pedicle-like joints, greenish-yellow, 2 mm. broad, the perianth parts 3 or 4, fleshy, each bearing a sessile anther; pistillate flowers paired at the nodes, with a short pedicle; ovary inferior; perianth parts 2, erect; style lacking; stigma 1.


Berry ovoid, 3 mm. long, maturing the second summer, 1-seeded, the seed ultimately explosively expelled and tending to stick to the surface on which it lands.

Accepted Name:
Arceuthobium douglasii Engelm.

Synonyms & Misapplications:
(none provided)
Additional Resources:

PNW Herbaria: Specimen records of Arceuthobium douglasii in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Arceuthobium douglasii checklist entry.

E-Flora BC: Arceuthobium douglasii atlas page.

CalPhotos: Arceuthobium douglasii photos.

USDA Plants: Arceuthobium douglasii information.

3 photographs:
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