As adjectives the difference between biserrate and biseriate
is that biserrate is (botany|of leaves) having serration that are themselves serrate while biseriate is in two rows or series; biserial.
biserrate
English
Adjective
(-)
(botany, of leaves) Having serration that are themselves serrate.
Alternative forms
* bi-serrate
biseriate
English
Adjective
(-)
In two rows or series; biserial.