It's fine to add examples to meta wikis like list of flowers or tag group:flowers, but the flower wiki itself shouldn't overdo it. It shouldn't try to list pictures of every flower in existence. I see people do that with other top-level umbrella tags like hat, shoes, skirt, bag, pants, etc and I think it's terrible.
It's impossible to read a wiki when it has a hundred different images hidden behind ten different [expand]
blocks, and half the images are either bad examples that barely feature the item in question, or they're tiny tags with like three posts each that don't even deserve being listed on the same level as larger tags that actually matter.