Between Exacum and Mahonia, which plant genus has about 70 species?
Exacum Exacum is a genus of plant in family Gentianaceae. It contains the following species (but this list is incomplete):
Haplothismia Haplothismia is a genus of myco-heterotrophic plants in family Burmanniaceae, first described as a genus in 1952. There is only one known species, Haplothismia exannulata, endemic to southern India (Kerala + Tamil Nadu). The plant is mycotrophic, i.e. lacking chlorophyll and obtaining sustenance from fungi in the soil.