Children (23 direct children, 26 direct and indirect children):
Humbertium ceres
Humbertium depressum
Humbertium ferrugineum
Humbertium proserpina
Humbertium core
Humbertium kelleri
Humbertium subboreale
Humbertium penangense
Humbertium sikorai
Humbertium phebe
(tree size 1)
Humbertium dodabettae
Humbertium penrissenense
Humbertium ferrugineoideum
Humbertium palnisium
Humbertium longicanale
Humbertium woodworthi
Humbertium umbrinum
(tree size 1)
Humbertium diana
Humbertium voigti
Humbertium ravenalae
Humbertium girardi
Humbertium pseudophallicum
Humbertium negritorum
(tree size 1)