Bulbothrix asiatica Y. Y. Zhang & Li S. Wang sp. nov. is proposed to accommodate specimens with a black lower surface, an emaculate and cracked upper surface and salazinic acid in the medulla. The species is currently known only from Cambodia and southwestern China. Other Parmeliaceae with bulbate cilia here newly reported from Cambodia are: Bulbothrix lyngei, B. subscortea, Relicina abstrusa and R. circumnodata. Phylogenetic trees for Bulbothrix are established to assess the affinities of the new species and test for a differentiation of saxicolous and epiphytic populations of B. subscortea. A key to these species is presented.