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Acarospora tucsonensis - Tucson Cracked Lichen

Acarospora tucsonensis, commonly known as Tucson Cracked Lichen, is a fascinating lichen species found in certain regions.

Considerations for Pets

• The text mentions lichens growing on rocks and in cracks in the soil, but there's no information about toxicity. However, keep in mind the potential for ingestion during outdoor activities.

Considerations for Children

• The text mentions Randy O'Brien Ceramics-Tucson, Arizona, creating ceramic "Lichen Urns." Urns are brittle when dropped and can cause injury to children, so keep out of reach.

Taxonomy and Nomenclature

• Scientific Name: Acarospora tucsonensis H. Magn.
• Common Name: Tucson Cracked Lichen
• Family: Acarosporaceae
• Rank: Species
• Symbol: ACTU2
• Synonyms: The text also refers to other Acarospora species with the common name "Cracked Lichen," such as Acarospora aeruginosa and Acarospora cinereoalba, which may be considered related. It also mentions Tonglet's cracked lichen (Acarospora tongleti).

Distribution and Habitat

• This lichen is associated with the Tucson area in Arizona, as suggested by its common name.
• The text mentions it occurring on rocks and in cracks in the soil, particularly in the Sonoran Desert region.

Morphological Characteristics and Growth Habits

• Acarospora tucsonensis has a lichenous growth habit.
• The texture of the lichen can have an earthy feel and look like "red cracked earth".

Ecological Role

• Lichens can contribute to the breaking down of rocks.
• Lichens can play a role in nitrogen fixation in the soil.

Further Information

• Wikispecies
• Lichen Flora of the Greater Sonoran Desert Region, Vol. 3
• Plant databases and garden guides.