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A small frog, males are 24-36 mm long, females 34-43 mm. Its head is about as broad as long; nostrils are somewhat widely spaced; snout is truncate to slightly pointed in profile. Has large eyes; tympanum commonly visible. Dorsum is usually green but can be green and brown or completely brown, but all are mottled with black or darker green, sometimes with scattered white spots and a white lateral stripe starting from below the eye. Can be divided into four morphotypes: 1. dark green with indistinct black reticulation; 2. pale green with distinct black reticulation; 3. like type 2 but green with brown patches; 4. like type 2 but mostly brown. Has white ventral surface and hind limbs; concealed parts of thighs are purple blotches on white or white and red or white and pale blue; these colors sometimes meet below abdomen and thighs. Groin has a violet patch and often also in the axilla, which is sometimes interrupted by blue or white spots or the patch may extend along the side of the body between dorsal green and ventral white (Menzies 1993).
The iris refers to a rainbow and its multicolored appearance.