The Iris latistyla has two spathes (protective layer) and the flowers are 5 cm in diameter with two pairs of petals.
The stems have 3 spathes (leaves of the flower bud), that are green, narrow, lanceolate, they end in a point (acuminate) and 2.54.5 cm (12 in) long and 68 mm wide. The flowers are 5 cm (2 in) in diameter, and come in shades of violet, or blue purple. It has 2 pairs of petals, 3 large sepals (outer petals), known as the 'falls' and 3 inner, smaller petals (or tepals), known as the 'standards'. 
