E-Flora BC: Electronic Atlas of the Flora of British Columbia

Arceuthobium americanum Nutt. ex Engelm.
American dwarf mistletoe
Santalaceae (Christmas Mistletoe family)
(Previously in Viscaceae)

Introduction to Vascular Plants

© Curtis Bjork  Email the photographer   (Photo ID #16558)

E-Flora BC Static Map
Distribution of Arceuthobium americanum
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Species Information

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Perennial parasitic shrub; stems yellow-green, smooth, usually tufted, 2-18 cm long; segments usually 1-2 mm thick; accessory branches usually several per node, whorled, in more than 1 plane.
Male flowers 2-3 mm wide, borne on short lateral stems, usually 2-several per node, the buds egg-shaped, the perianth lobes rounded on the backs; female flowers 2-several, whorled at each node, short-stalked.
Berries, egg-shaped, about 3 mm long, greenish to bluish, usually 1-seeded, mucilaginous, maturing the 2nd summer.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Parasitic on Pinus in the lowland, steppe and montane zones; infrequent in S BC, rare W of Coast-Cascade Mountains; E to MB and S to CO, UT, NV and CA.

Source: The Illustrated Flora of British Columbia


Ecological Framework for Arceuthobium americanum

The table below shows the species-specific information calculated from
original data (BEC database) provided by the BC Ministry of Forests and Range.
(Updated August, 2013)

Site Information
Value / Class




Elevation (metres) 1080 1336 1543
Slope Gradient (%) 3 9 15
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
10 117 180
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
2 3 4
Modal Nutrient Regime
Number of field plots
 species was recorded in:
Modal BEC Zone Class
All BEC Zones (# of stations/zone) species was recorded in: ESSF(1), IDF(1), MS(2)


The climate type for this species, as reported in the: "British Columbia plant species codes and selected attributes. Version 6 Database" (Meidinger et al. 2008), is not evaluated, unknown or variable.

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References