Flos apidanus male has a dark purple upperwings with a narrow front edge, the female is more blue and shiny, the outline of the wings is somewhat regular at the costa and distal to the two wings. The underside of the wing is pale yellowish to brown in color, has whitish markings with a purple tinge. On the forewings there are discal and post-discal bands, on the hind wings there is a whitish discal band from the mid-costa to the mid-dorsum, at the base of the ribs of both wings there are small brown spots. This species has a short tail on veins 2 and toothed on veins 1b and 3.
Larva: larvae of Flos apidanus are yellowish green with green dorsal bands, have black or dark brown nectar glands in the 7th abdominal segment, their bodies are covered with short setae.
Pupa: Flos apidanus pupae are yellowish green in color, have a characteristic of lycaenid shape with slightly visible anal segments.