AN ANNOTATED LIST OF UREDINIOMYCETES (RUST FUNGI) FROM SOUTH-AFRICA .1. MELAMPSORACEAE AND PUCCINIACEAE, EXCLUDING PUCCINIA AND UROMYCES

Up-to-date information is given on the identity, occurrence, nomenclat ure, host ranges, geographical distribution and literature references of the Urediniomycetes in South Africa. Species of the family Melampso raceae and all species of the family Pucciniaceae other than those in the genera Puccinia Pers, and Uromyces (Link) Unger are listed. New sp ecies records since 1945 include the following: Melampsora allii-popul ina Kleb., Melampsora coleosporioides Dietel, Melampsora laricipopulin a Kleb., Melampsora medusae Thum., Frommea obtusa-duchesneae (Arthur) Arthur, Hemileia gardeniae-thunbergiae Maubl. & Roger, Phakopsora goss ypii (Arthur) Hirats. f., Uromycladium tepperianum (Sacc.) McAlpine an d Tranzschelia discolor (Fuckel) Tranzschel & M.A. Litv. Although many species of rusts have already been recorded, these are thought to rep resent only a small percentage of the rust population in southern Afri ca. Furthermore, only a small portion of rust specimens at present hou sed at PREM have so far been studied. Continued research on this econo mically important group of fungi is therefore essential.