- 责任者：Wang Qi (State Key Laboratory of Systematic and Evolutionary Botany ; Institute of Botany ; Chinese Academy of Sciences ; Beijing 100093 ; China)
- 刊名：Acta Palaeontologica Sinica
- 出版年：2012
- 卷期：51(1)
- 关键词：豆科 ; Leguminosae ; 山东 ; Shandong Province
- 页码：p.1-13
- 图表：3 illus., 128 refs.
- 分类号：1102
- 出版序号：20130361
- issnNo：ISSN0001-6616
- isbnNo：CN32-1188/Q
Based on morphological observations of the leaf architecture and pulvini of extant redbuds(Cercis), this paper focused on pulvinus morphology in leaf impressions (Cercis miochinensis Hu and Chaney, 1938) from the Miocene Shanwang Formation of Shandong Province. The fossils possess obovate upper pulvinus impressions which become semi-circular when degraded, as well as an ovate lower pulvinus impression in one of the specimens. Together with the results from comparative morphology and anatomy, the present study supports the view that the unifoliolate blade and pulvinus in the Cercis leaf are derived characters, and that the most primitive legumes had pinnately compound leaves probably with pulvini on each of their own petioles and petiolules.