In addition to the two species cultivated for coffee, Coffea arabica and C. canephora, the genus has a further 123 wild species, of which 112 are native to Africa and the Indian Ocean islands. Razafinarivo et al. assess...
Gene flow is important in counteracting the divergence of populations but also in spreading genes among populations. Buehler et al. describe the effective mating system and contemporary gene flow in the alpine perennial...
Sexually deceptive Ophrys orchids attract specific pollinators, and shifts in these pollinators may drive speciation with a progenitor–derivative pattern. Schlüter et al. find evidence for such a scenario in an east...