中国科学家在早白垩世义县组地层中发现一株1.25亿年前的“两性花”化石,成为首个包括雄性器官、雌性器官、茎以及双子叶型叶片直接相连的标本,显示被子植物的起源时间可能更早。这株与茎、双子叶型叶片直接相连的“两性花”化石,出自于辽宁省凌源市郊区大王杖子附近的义县组地层,被命名为“凌源假人字果”。该化石是之前的被 Chinese scientists discovered a fossil bisexual flower 125 million years ago in the early Cretaceous Yixian formation, becoming the first specimen to include male organs, female organs, stems, and dicotyledon type leaves, showing the quilt. The time of origin of the plant may be earlier. This “bisexual flower” fossil directly connected to the stem and dicotyledonous leaves is from the Yixian Formation near the Dawangzhangzi suburb of Lingyuan City in Liaoning Province and was named “Lingyuan Dummies”. . The fossil was formerly