Even worse, honeybees can compete with wild local bees... Best solution is indeed flowers (local plants are usually better choices) and providing a good environment for wild pollinators
Among bryophytes, Aneura obviously. Who wouldn't want non-chlorophyllian mosses? Dung mosses are amazing as well and just like angiosperms they are propagated by insects so sporophytes are often quite elaborate! Among flowering plants, probably saxifrages, weird plants, lots of diversity, nice.
If you want some recommendations of fun tv-shows/films/books, don't hesitate!