On Fri, 18 Jul 2003, Cereoid-UR12- wrote: |Just because the species are in two different genera that doesn't |necessarily mean the two genera are not closely related. There is |such a thing as intergeneric hybrids. Intergeneric hybrids have been |reported in the Apiaceae (Umbelliferae) and in the closely allied |Araliaceae.
How many millions of years must have passed in order for the various genera in the family of Apiacea to have descended from a single genus?
I suppose it would be asking too much for a poster I could slap up on the wall, detailing the branches, but then again... How does a person generally go about judging how genetically distant any two genera are, let alone species?