Children (15 direct children, 21 direct and indirect children):
Houlletia brocklehurstiana
Houlletia tigrina
Houlletia landsbergii
Houlletia odoratissima
(tree size 5)
Houlletia conspersa
Houlletia lowiana
Houlletia roraimensis
Houlletia sanderi
Houlletia unguiculata
Houlletia wallisii
(tree size 1)
Houlletia vittata
Houlletia boliviana
Houlletia buchtienii
Houlletia subg. neohoulletia
Houlletia kalbreyeriana
Houlletia clarae