Howarthia caelestis
(tree size 3)
Howarthia cheni
Howarthia coelestis
(tree size 2)
Howarthia courvoisieri
Howarthia cyanea
Howarthia hishikawai
Howarthia kimurai
Howarthia melli
(tree size 2)
Howarthia nigricans
(tree size 2)
Howarthia sakakibarai
Howarthia sugiyamai
Howarthia ueharai
Howarthia wakaharai
Howarthia watanabei
Howarthia yukinobui