 R.J. Bayer has published about 100 papers and book chapters in internationally recognized publications.He has collected plants around the world, including Australia, New Zealand, New Caledonia, United States of America, Canada, South America, southern Africa, Madagascar and western Europe.His collections are primarily deposited in various herbaria including ALTA and CANB with duplicates of many collections in CAN, CHR, DAO, F, MO, S, E, X, NBG, NSW, OS, P, PERTH, PRE, RM, TAN, US, and WOCB.