Hans Hillewaert:
Costus malortieanus
Hans Hillewaert:
Costus pulverulentus
Hans Hillewaert:
Costus curvibracteatus
Hans Hillewaert:
Costus woodsonii
Hans Hillewaert:
Costus woodsonii
Hans Hillewaert:
Cheilocostus speciosus
Hans Hillewaert:
Costus spectabilis