There are many different species of iris - the most well-known are a bluey purple colour, but they can be white or even bright yellow!
Iris can be green, yellow, white, blue, pink, orange and purple.
Irises are every color except bright red.
Iris has a very unique shape among flowers.
Iris is a flower that starts with an I
Thrush is to iris as bird is to flower. Thrush and iris are specific birds and flowers.
iris
The Iris is a flower, the Iris is also part of the eye.
Heterochromia is the condition of two colors, especially of the iris.
Impatiens Iris Ixia Ipomoea
Iris.
iris...
impatients and iris
Iris
In the sentence, 'Several flowers, among them the iris and the lily, have their own special days.', there are no proper nouns, the common nouns are flowers, iris, lily, and days.