- Upper Cortex: Short, thick hyphae pressed together to form a
protective layer.
- Photosynthetic Layer: In most lichens, the algae are found in
a single layer under the protective cortex.
- Pith: A loosely woven mat of hyphae holding moisture.
- Lower Cortex: Just like the upper cortex protecting the
bottom of the group.
- Rhizomes: Bundles of hyphae anchoring the group.