Irises like much of flowering plants are beautiful because God intended it to be that way.
Cats like to eat irises, but they are bad for the cats. Deer don't eat it, because they hate the scent (one we humans can't smell) of the flower. I do not what other animals eat irises, but I know barely any do.
I would use "irises."
Do not allow irises to become too crowded in your garden because the irises will flower poorly or not at all.
Vincent van Gogh painted 'Irises'
William Rickatson Dykes has written: 'A handbook of garden irises' -- subject(s): Irises (Plant), Irises (Plants) 'Irises' -- subject(s): Iris (Plant), Irish
Yes, usually called Vase with Irises.
You can find irises in temperate parts of the world. There are over 300 species.
Irises do not live naturally in the desert but can be grown there with sufficient irrigation.
Irises grow best in a bedding that is PH neutral. They like well drained loose soil because irises do not like really wet soil. If the ground is a clay soil, its best to do a raised bed.
Irises have been around for a long time. Different irises originated in different parts of the world. King Tutmose III had them carved into the Temple of Amon at Karnak.
Their eyes are located on the top and the to side of their heads. How the eyes look depends on the species. Some have natural looking irises, some have brighter colored irises.