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abortive uredinia According to Stedje American Red Dutch black currant broad leaves Cronartium occidentale Cronartium ribicola currant from Norway CURRANT VARIETIES dark green Fay Fay Prolific fertile or abortive fertile uredinia fruiting bodies fully mature Hermansverk immune currant immune to white inoculation with aeciospores inoculum leaf characters leaf development leaf tissue leaves with less leaves with shallow less elongated lobes medium lobes name Viking necrotic flecks Norwegian variety pathological greenhouse pine blister rust pinon rust Pinus plants tested Prince Albert R0d Hollandsk Druerips red currant Ribes aureum Ribes petraeum hybrid Rote Hollandische Royal Botanic Garden rubrum Scotland sepals shallow lobes sharply serrate shoot Spaulding spores stages of leaf strains of blister strobus susceptible check plants susceptible to white tender tightly folded Tupper Lake uncupped leaves uredinia or telia urediniospores varietal name varieties Holland variety Fay variety of red Viking plants Viking variety white currants white pine blister writer yellow-green