Iris is a flower that starts with an I
· Impatiens
· Iris
IrisImpatiensIpomoeaIxia
Ina
If you mean "U", there are 0 flowers that start with "U".
Runuculus
rose
Tagetes.
orchid
Aspidistra.
violet
Jasmine and Jupiter's beard are flowers.
The geranium plant has bright colored flowers. The flowers usually are pink, red, or white.
narcissus