Monographs Details: Exormotheca pustulosa Mitt.
Authority: Bischler, Hélène, et al. 2005. Marchantiidae. Fl. Neotrop. Monogr. 97: 1--262. (Published by NYBG Press)
Description:Species Description - Thallus 1-3 mm wide, blue-green, whitish when dry. Epidermal pores with ring of 8-10 cells. Basal tissue with numerous oil cells. Ventral scales extending beyond thallus margins, hyaline, appendage short, filiform. Monoecious. Spores brown, 52-67 µm diam., distal face with plates. Elaters with 3 helical bands. Gametophytic chromosome number n = 16.

Discussion:The species was thought to have been introduced in the Botanical Garden of Mexico (Gradstein et al., 1983) but has since been collected also in Puebla, in a natural environment.

Distribition and Ecology: A rare but widespread species, recorded from the Mediterranean area, Macaronesia, tropical and S Africa, the Mascarenes, and St. Helena. Two localities are known from Mexico (D. F. and Puebla). The species grows on sandy soil, on acidic cliffs and rock outcrops in rocky grassland at 2150-2300 m elevation.

Distribution:Distrito Federal Mexico North America| Puebla Mexico North America|