Callistemon is not a valid species
Did you mean one of the species from the following list?
Callistemon brachyandrus - 5 collection objects
Callistemon citrinus - 9 collection objects
Callistemon flavovirens - 1 collection objects
Callistemon formosus - 1 collection objects
Callistemon glaucus - 1 collection objects
Callistemon pallidus - 8 collection objects
Callistemon pityoides - 6 collection objects
Callistemon rugulosus - 8 collection objects
Callistemon salignus - 3 collection objects
Callistemon sieberi - 13 collection objects
Callistemon viminalis - 2 collection objects