what does Nymphaea and Bupleurum have in common?
Bupleurum Bupleurum is a large genus of annual or perennial herbs or woody shrubs, with about one hundred and ninety species, belonging to the Apiaceae family. The full size of its species may vary between a few cm to up to 3 m high. Their compound umbels of small flowers are adorned with bracteoles that are sometimes large and may play a role in attracting pollinators. Rare among Apiaceae are the simple leaves, bracts (if present) and bracteoles. The genus is almost exclusively native in the Old World Northern Hemisphere, with one species native to North America and one species native to southern Africa.
Exoneura robusta Exoneura robusta is a species of the primitively eusocial allodapine bee, belonging to the genus commonly referred to as "reed bees". Their common name derives from their use of the soft pith of dead fern fronds as a nesting material. They are native to southeastern Australia, living in both montane and heathland habitats. "E. robusta" do not have a fixed pattern of sociality, but rather they are capable of adapting their social strategy to different environments. While typically univoltine (producing one brood per season), populations living in warmer habitats (such as those in higher latitude heathlands) are capable of producing two broods per season. This leads to the incidence of sibling rearing and eusocial behavior. "E. robusta" lack strict morphological castes, thus allowing for their plastic social behavior and dominance hierarchies.