| Popis: |
Previous to the study of the coniferous woods of the Lamar River Flora by Read (1933) the extinct plants of Yellowstone Park had received very little attention since the appearance of Knowlton's monograph in 1899. This is rather surprising in view of the fact that it is a region where well-preserved wood and leaf impressions exist in close association but it is probably attributable to the general lack of scientific interest in fossilized woods, and to the fact that Knowlton's treatment of the leaf impressions was a reasonably complete and carefully executed study. |
