Full Idea
Anaxagoras contrasts with other thinkers in the formula that his 'elements' were not the air of Anaximenes or the fire of Heraclitus or the roots of Empedocles or the atoms of Leucippus, but the infinite variety of homoiomereia.
Clarification
'homoiomereia' are stuffs of which all the parts have the same constitution as the whole
Gist of Idea
The ultimate constituents of reality are the homoeomeries
Source
report of Anaxagoras (fragments/reports [c.460 BCE]) by Gregory Vlastos - The Physical Theory of Anaxagoras III
Book Reference
Vlastos,Gregory: 'Studies in Greek Phil I: The Presocratics', ed/tr. Graham,D.W [Princeton 1993], p.327
A Reaction
Not sure about the 'roots' of Empedocles. Anaxagoras is particularly thinking of the basic stuffs that make up the body, such as hair, bone and blood. It is plausible to reduce everything to stuffs that seem to have no further structure.