Which plant has the highest number of species in  Hottonia or Spiraea
Spiraea Spiraea , is a genus of about 80 to 100 species of shrubs in the family Rosaceae. They are native to the temperate Northern Hemisphere, with the greatest diversity in eastern Asia.
Banksia hookeriana Banksia hookeriana, commonly known as Hooker's banksia, is a species of shrub of the genus "Banksia" in the family Proteaceae. It is native to the southwest of Western Australia and can reach up to 4 m high and 3 m wide. This species has long narrow serrated leaves and large, bright flower spikes, initially white before opening to a bright orange that appear over the cooler months. The flowers are pollinated by honeyeaters. The ageing flower spikes develop woody seed pods known as follicles. "B. hookeriana" is serotinous — large numbers of seeds are stored in the plant canopy for years until the plants are burnt by bushfire.