Complex sentence: The foliage is grayish to silvery green with bipinnatifid, deeply lobed leaves with winged petioles; in the case of "Ambrosia coronopifolia", the leaves are simple.
Split into simpler sentences: The foliage is grayish to silvery green with bipinnatifid, deeply lobed leaves with winged petioles. But in the case of "Ambrosia coronopifolia", the leaves are simple.