→ 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.