This is the 14747th most frequent Polish word.
płomiennicę
"Płomiennicę" is the accusative form of "płomiennica," which refers to a type of flame-colored mushroom in Polish, particularly the velvet shank (Flammulina).
Here, 'płomiennicę' is used as a noun in accusative case, referring to a specific type of flower.
Płomiennicę widziałem w ogrodzie botanicznym, gdzie prezentowano różne gatunki kwiatów.
I saw the flame lily in the botanical garden, where various flower species were displayed.
In this sentence 'płomiennicę' is a noun in accusative case, used to specify the flower being discussed.
Podczas lekcji biologii nauczyciel wyjaśnił nam, co charakteryzuje płomiennicę.
During the biology lesson, the teacher explained to us what distinguishes the flame lily.
In this context, 'płomiennicy' is used in genitive case, describing the object in a possessive or descriptive manner.