The plural of iris is irises.
The plural possessive of iris is irises' (apostrophe after the S).
Examples:
The irises' stems had all been trimmed before being placed in water.
His irises' size decreased in the bright light.
There are two accepted forms for possessive singular nouns ending in s:
Add an apostrophe (') after the existing s at the end of the word: Iris'
Add an apostrophe s ('s) after the existing s at the end of the word: Iris's
Examples:
Today is Iris' birthday.
Today is Iris's birthday.
There are two accepted forms for possessive singular nouns ending in s:
Add an apostrophe (') after the existing s at the end of the word: iris'
Add an apostrophe s ('s) after the existing s at the end of the word: iris's
The plural form for iris is irises.
The plural possessive form is irises'.
The possessive form of the noun iris (flower or eye section) is iris's.
The plural form for the name Iris is the Irises.
The possessive form for the proper noun Iris is Iris's.
Example: We met Iris's parents at the picnic.
Irises
The singular possessive form for the noun iris is iris's.Example: The iris's color brings the garden to life.
The singular possessive form is heart's; the plural possessive form is hearts'.
The plural form is founders. The plural possessive is founders'.
The plural of iris is irises.
The plural form for the noun sergeant is sergeants; the plural possessive form is sergeants'.
The singular possessive form for the noun knife is knife's.The plural form is knives; the plural possessive form is knives'.
The noun 'sister' is not plural and is not possessive.The plural form is sisters.The possessive form is sister's.The plural possessive form is sisters'.
The singular form is goose; the singular possessive form is goose's.The plural form is geese; the plural possessive form is geese's.
The plural possessive form of "cherubim" is "cherubim's."
The plural form is valleys. The plural possessive is valleys'.
The plural form is squirrels. The plural possessive is squirrels'.
The plural form is cockroaches; the plural possessive form is cockroaches'.