On 7 Jul 05 at 9:14, John Bryan wrote: > For what it is worth, my opinion is that molecular differences > should NOT trump floral form. On further reflection: The real problem occurs if two species, say /Veriolitsis glomulama/ and /V. sphærioideastrum/ can only be distinguished via molecular characteristics. It then becomes impossible for anyone outside a properly equipped laboratory to distinguish these species. Rearranging the taxonomic hierarchy on the basis of molecular evidence does not present the same problem as long as some chemistry-maddened botanist doesn't write a key that depends on the chemistry. It would still be possible to slot a given plant into the hierarchy on the basis of macroscopic features, since keys don't necessarily follow the taxonomic hierarchy. On yet more reflection: already chemistry must be used to identify some plants. Fungi present an example. The famous book on hallucinogenic and poisonous mushrooms makes certain distinctions on the basis of chemistry, though it's simple chemistry that can be done in the field if you carry along a few reagents -- color reaction stuff. -- Rodger Whitlock Victoria, British Columbia, Canada Maritime Zone 8, a cool Mediterranean climate on beautiful Vancouver Island