I have seldom came across the claim, generally in a humorous or ridiculing way, that Botany is "not a real science".
While I personally reject this claim, at least in the context of plant anatomy and physiology, I want to better understand that claim.
For example, I can understand why taxonating the unending amount of sub-species of well defined species of trees, can be a waste of time and not doing science, but I cannot understand why a generalization about Botany as a whole is valid.
I would not be surprised to come across a similar claim about viruses (which I understand and I might be wrong, going through evolution much more extensively than, say, humans).
Is there a logical argument according to which at least some part of biology isn't scientific?