Frequently (and not so frequently) Asked Questions
BRIEF: Please explain the difference between asteracae and compositae.
Please explain the difference between asteracae and compositae.
I believe they are synonyms for the same plant family.
Are plants categorized into the plant families by physical appearance or by chemical properties or, is physical appearance an indication of chemical properties?
By physical appearance and structure, especially (but not exclusively) according to reproductive structures and life cycles.
Do plants in the same plant family share the same chemical properties?
Often there are similar if not the same chemicals in members of the same family. But non-volatile chemicals are probably not the cause of your allergies. The nasty IgE-mediated sneezes are usually caused by more complex antigens such as the proteins in pollen, which are often different between members of the same family or even genus. It is a rather unpredictable business, that has something to do with when you were first exposed, your age, your specific immune system, etc. I find immunology incredibly confusing. It is a good thing I am not a doctor, just a lowly nutritionist!