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About Lichens (General)

Lichens are fascinating composite organisms, often found in diverse environments. The provided text references several aspects of lichens, particularly focusing on morphology and specific genera like Cladonia.

Considerations for Pets

• Some lichens may have sharp-looking points on squamules.

Considerations for Children

• Some lichens may have sharp-looking points on squamules.

Nomenclature and Taxonomy

• References are made to the genus Cladonia, commonly known as cup-lichens, stag's-horn lichens, or reindeer lichens.
• The pyxie cup lichen (C. pyxidata) is specifically mentioned.
• Other Cladonia species mentioned include Cladonia Pocillum, Cladonia Coccifera, C. uncialis, C. furcata, Cladonia asahinae, Cladonia pleurota, and C. digitata.

Morphological Characteristics

• Lichens can be foliose (leaf-like) or fruticose (shrub-like).
• Podetia (stalk-like structures) may be unbranched or sparingly branched, with tips ranging from blunt to acute.
• Some lichens form cups or antlers, bearing fruits at their tips when mature.
• Pyxie cup lichens (C. pyxidata) have small, funnel-shaped cups.
• Branch tips can be thinner than the main branches and form acute angles.
• Apothecia (fruiting bodies) can be red.

Ecology and Distribution

• Lichens are found in alpine tundra.
• They can grow on various substrates, including rocks composed of calcium carbonate.
• Some species are distributed epigeically (on the ground).

Interactions with Other Organisms

• The text mentions that lichens can be impacted by prions.
• Lichens can be found on tree bark.

Quirky Facts

• The text mentions the "Rasputin of biology" in relation to lichens.

Further Information

• Reference is made to the "Lichen Flora of the Greater Sonoran Desert Region".
• The "ABRS lichens glossary" is mentioned as a resource.
• "Lichens of North America" can be ordered directly from Yale University Press.
• "Common Lichens of Cypress Hills Interprovincial Park" is mentioned.