There are a couple of little known trees but the most common flower is Xylobium a family of Orchids.
Xtabentun is a Mexican liqueur. The ingredients include the nectar from the xtabentun flower.
Jasmine
Ursinia
Aster.
buttercup
violet
Marigold :)
flowers beginning with A: * African violet * amaryllis * aster * azalea
One of them is a kingcup.
oleander
Nerines.