Pyramidula Bridel, 1818 [1819].

Pyramidula is a typical member of the Funariaceae: an acrocarpous moss growing on disturbed or arid habitats with the typical costate leaves and thin-walled cells with a basically rectangular rather than hexagonal outline, thus different from the Bryaceae. The distinguishing feature of Pyramidula is the 4-ribbed calyptra with a basically square outline of its lower portion when viewed in cross-section. Pyramidula, recently documented for California, should be sought in coastal southern California.
see key to Funaria Etc.

Species included:
Pyramidula tetragona (Bridel) Bridel