Such flowers must be visited by bees that either bring pollen from other pollen-coated stigmas or transfer pollen from within the tip of the anther tube to the stigma.
(Such flowers; must be visited; by bees) (either; bring; pollen; from other pollen-coated stigmas or transfer pollen from within the tip of the anther tube to the stigma)
Such flowers either
must be visited bring
by bees
pollen from other pollen-coated stigmas or transfer pollen from within the tip of the anther tube to the stigma