In botany terms the difference between bract and phyllary
is that bract is a leaf or leaf-like structure from the axil out of which a stalk of a flower or an inflorescence arises while phyllary is an individual bract within an involucre or involucel.
bract
Noun
(
en noun)
(botany) A leaf or leaf-like structure from the axil out of which a stalk of a flower or an inflorescence arises.
phyllary
English
Noun
(phyllaries)
(botany) An individual bract within an involucre or involucel.