The Tucumán amazon is a mostly green short-tailed parrot, medium-sized at 31 cm (12 in) long. The green feathers of the upper-body have black margins. There is red plumage on the forehead and fore-crown, and the red does not extend around the white eye-rings. It has red primary wing feathers and no red at the bend of the wing. It has orange thighs and red at base of the green tail. They have a horn coloured beak, orange-yellow irises, and pinkish-grey legs. The male and female are identical in external appearance. Juveniles have less red on the head, green primary wing feathers, green thighs, and grey irises.