SafePlants

Knobcone Pine Dwarf Mistletoe

The Knobcone Pine Dwarf Mistletoe, scientifically known as Arceuthobium siskiyouense Hawksw., Wiens & D. Nickrent, is a parasitic plant that primarily infects knobcone pine trees (Pinus attenuata). It belongs to the genus Arceuthobium, which encompasses various dwarf mistletoe species.

Considerations for Pets

• The plant is known to cause "witches' brooms" in the trees they infect. The unusual growth patterns may be tempting for pets to investigate.

Considerations for Children

• The plant is known to cause "witches' brooms" in the trees they infect. The unusual growth patterns may be tempting for children to investigate.

Taxonomy and Nomenclature

• Scientific Name: Arceuthobium siskiyouense Hawksw., Wiens & D. Nickrent
• Common Name: Knobcone Pine Dwarf Mistletoe
• Other Arceuthobium species mentioned: Arceuthobium campylopodum, Arceuthobium vaginatum subsp. cryptopodum, Arceuthobium americanum, Arceuthobium californicum, Arceuthobium occidentale, Arceuthobium monticola, Arceuthobium tsugense ssp.

Distribution and Habitat

• Arceuthobium siskiyouense is endemic to the Klamath Mountains of northern California.
• It parasitizes knobcone pine (Pinus attenuata) primarily, but may also infect Coulter pine (Pinus coulteri) and gray pine.

Ecological Role

• Dwarf mistletoes are parasitic flowering plants, and Arceuthobium siskiyouense parasitizes its host by extracting water and nutrients.
• Infection can cause "witches' brooms," which are dense clusters of branches, on the host tree.

Interactions with Other Organisms

• Dwarf mistletoe can significantly impact the growth and health of its host tree.
• Wildlife may use the witches' brooms created by dwarf mistletoe for shelter.