The main body (thallus) of these lichens typically appears as a thin layer that can be smooth, cracked, warty, or granular in texture.

The thallus may sometimes develop specialised structures such as soredia (powdery propagules), isidia (small outgrowths), or tiny scale-like features.

Their photobiont (algal partner) belongs to the chlorococcoid group, featuring spherical or broadly oval-shaped cells.

These apothecia sit directly on the thallus surface and can vary from flat to strongly convex in shape and come in various colours.

[3] The genus also produces asexual reproductive structures called pycnidia, which can be sunken into or sitting on the thallus surface.