Presented in Association with the Western New Mexico University Department
of Natural Sciences
Viscaceae (Mistletoe Family)
The Viscaceae are green parasitic plants found growing on trees. Each species has a particular tree or group of trees which is its preferred host. Many can be identified simply by identifying the host tree. The modified roots of the parasite, called "haustoria", penetrate the host tissue to obtain water and nutrients. Although the mistletoes contain chlorophyll, they have much less than their hosts. The Viscaceae have recently been found to be closely related to the Santalaceae and some authorities now recommend combining the two families. Phoradendron californicum has been seen as far east as Road Forks in New Mexico along the I-10 corridor. It is very easily seen along I-10 between Texas Canyon and Benson, AZ. However, it has not yet been noted within the Gila National Forest.