| Rec | Mtg# | Year | Authors | Institution | Talk title |
|---|---|---|---|---|---|
| 1 | 753 | 1955 | Robert Sumner Sigafoos | USGS | Contributions of plant ecology to geologic studies in Alaska |
| 2 | 799 | 1959 | Robert Sumner Sigafoos | USGS | Botanical evidence of floods and flood-plain deposition |
| 3 | 999 | 1975 | Robert Sumner Sigafoos | USGS | Recent catastrophic floods at Mount Rainier, Washington |