What are both Hippophae and Ceratophyllum?
Ceratophyllum: Ceratophyllum is a cosmopolitan genus of flowering plants including four accepted species in 2016, commonly found in ponds, marshes, and quiet streams in tropical and in temperate regions. Hippophae: Hippophae is a genus of sea buckthorns, deciduous shrubs in the family Elaeagnaceae.
a genus