Orationem colligere means exactly the same as collectam dicere (Du Cange, Glossarium, s.v. Collecta 8). The collect is a prayer said during the mass. The meaning of the whole canon is nevertheless unclear. Pinell (1957: 386, n. 5) suggested that in the presence of the bishop presbyters can say only the collects of the psalm, while the final collect and the blessing are reserved to the bishop.