This species is defined by its reduced, vivid orange appearance and unique, aggregated reproductive structures.

[2] The Filsoniana lhasanensis lichen is characterised by its crust-like structure, known as a thallus, which is areolate (appearing as small individual patches).

Notably, Filsoniana lhasanensis thallus appears reduced, with only a few scattered areoles, which makes it stand out when compared to its closely related counterparts like F. australiensis and F. rexfilsonii.

[2] Preferring rocky terrains, Filsoniana lhasanensis is found in open areas, typically co-existing with other lichen species including Aspicilia, Lecanora, and Rusavskia, among others.

This lichen thrives in the arid and semi-arid regions of Lhasa and Shannan cities, situated at elevations ranging from 4,200 to 4,432 m (13,780 to 14,541 ft).