FIG. 4 in On the synonymization of Acaulon longifolium Herrnst. & Heyn with Acaulon fontiquerianum Casas & Sérgio (Pottiaceae)

FIG. 4. — Known world distribution of Acaulon fontiquerianum Casas & Sérgio based on published records and herbarium specimens.Black dots indicate populations initially ascribed to A. fontiquerianum; a grey square indicates an unconfirmed Moroccan population of this species. Populations initially adscribed to A. longifolium Herrnst. & Heyn. and the new population are represented with black and grey triangles, respectively. Latitude and longitude numbers are indicated in degrees.