I heartily agree that it is a great source of fascinating discussion and a voyage of discovery. I enjoy every step! But I just wondered what shape those pigeonholes had now that we use gene sequencing... Mark " We must accept the fact that some species are more well-defined or > "natural" than others and that some plants do not fit the pigeonholes to > our satisfaction at all. This should be seen as a stimulation to our > curiosity and not as a source of dismay. > > Dylan"