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Arceuthobium abietinum
Fir dwarf mistletoe is a parasitic shrub that grows on conifers, mainly true firs in western North America, drawing water and nutrients from its host. It is a species, not a houseplant, so care in the usual sense does not apply.
Arceuthobium abietinum, commonly known as fir dwarf mistletoe, is a species of dwarf mistletoe. It is native to western North America from Washington to New Mexico to northern Mexico, where it lives in coniferous forests as a parasite on various species of fir, particularly white fir, giant fir, and red fir, and less commonly on species of pine and spruce. There are four recognized varieties of A. abietinum, largely distinguished by their host preferences and geographic ranges. Largely because of its impacts on host trees, including the production of witch's brooms, A. abietinum significantly impacts forest ecology where it is present.
Infection by A. abietinum negatively affects the growth and health of host trees, reducing longevity and seed production. A. abietinum also regularly induces abnormal growth patterns in its host, including the production of witch's brooms. While these brooms are typically small, flattened, and nonsystematic, A. abietinum var. wiensii often induces large brooms in Picea breweriana. These brooms increase the availability of nutrients to the mistletoe and provide valuable habitat for wildlife, but they also decrease the vigor of the host tree. Unlike in some other mistletoe-conifer relationships, the brooms that A. abietinum induces in its hosts do not significantly increase the host's susceptibility to fire.
American dwarf mistletoe · Apache dwarf mistletoe · Azores Dwarf Mistletoe · Southwestern white pine dwarf mistletoe · Sugar pine dwarf mistletoe · Western dwarf mistletoe · Limber pine dwarf mistletoe · Pinyon dwarf mistletoe · Douglas-fir dwarf mistletoe · Huachuca Mountain dwarf mistletoe · Larch dwarf mistletoe · Coastal dwarf mistletoe
Text excerpted from the Wikipedia article Arceuthobium abietinum by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.
The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.
Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.
