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SUMMARY
| 1. | The distribution of Puccinia Parkerae is extended to eastern Washington, northern Idaho, and British Columbia. | ||||
| 2. | The rust is primarily specialized on Ribes lacustre. | ||||
| 3. | Ribes bracteosum, R. sanguineum, and Grossularia divaricata are reported as new hosts. | ||||
| 4. | Stem and fruit infection of the host is reported for the first time. | ||||
| 5. | Internal telia are reported in the fruit and stem of Ribes lacustre. | ||||