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Arizona Orange Lichen

Explore the fascinating world of the Arizona Orange Lichen, a vibrant and intriguing member of the lichen community. This lichen, scientifically known as Caloplaca arizonica, adds a splash of color to the arid landscapes of the southwestern United States.

Scientific Classification

• Scientific Name: Caloplaca arizonica H. Magn.
• Common Name: Arizona Orange Lichen
• Rank: Species
• Group: Lichen
• Family: Teloschistaceae

Distribution and Habitat

This lichen is commonly found in Arizona, particularly in the Sonoran Desert and other arid regions of the southwestern United States. It thrives on rocks and boulders, contributing to the colorful tapestry of desert landscapes.

Morphological Characteristics

• The Arizona Orange Lichen is a lichenous plant.
• It features a yellow-orange areolate thallus.
• Thallus greenish-yellow, the apothecia darker yellow or orange mostly on lime.
• Foliose, adnate to loosely adnate, 4-10 cm in diam., irregularly lobate lobes.
• Grows as inconspicuous crusts, broad lobes and filigreeing beards.
• The color of lichens can vary from gray-green to yellow and orange to dark

Ecological Role

Lichens play a crucial role in their ecosystems, colonizing harsh environments and contributing to soil formation. They are often found on rocks, trees, and other surfaces where other plants struggle to survive.

Interactions with Other Organisms

• Robberflies were observed on Arizona Beard Lichen (Usnea intermedia).
• Lichen Moths have been observed.

Quirky Facts

• Some lichens yield an orange dye.

Further Information

For more in-depth information, consider exploring these resources:

• Lichens Unlimited, Arizona State University, Tempe, Arizona
• The Lichen Herbarium at Arizona State University
• University of Arizona Cooperative Extension, Yavapai County
• Northern Arizona University, Flagstaff, AZ