Se *d f* n d e r has lot's of organizing these things. I believe it's mostly european work and some norther american. Certainly not everything.
Lot's of old school 'breeders' had the same varieties with their own selection. Important to note that strain is a cut and variety is a breed.
Can you please go deeper and explain why?MJ Passion is correct, for example, Blueberry is A strain and Wedding Cake is not
https://en.wikipedia.org/wiki/Strain_(biology)The term has no official ranking status in botany; the term refers to the collective descendants produced from a common ancestor that share a uniform morphological or physiological character.
Yes well this is based on my Cannabis breeders bible by ED Grene Blueberry has been crossed with itself many times and due to inbreeding it has become very stable so for example out of 10 seeds you won't find much variation. but if you were to Pop a pack of triangle mints a.k.a. Wedding cake you would see great variation in the results as it is a cross of triangle kush and animal mints. And to my friend who said Wedding cake is a clone only, is it really when the seeds it came from are still available and both the mother and father plant are still out there?Can you please go deeper and explain why?