Paleobotanical study on the phylogeny of Angiosperms

关于被子植物的系统发育，特别是与已灭绝的被子植物前阶段的裸子植物有关的结果如下。来自北海道白垩纪的裸子植物雌性结实作用被认为是一个新目，很快就会在其他地方的科学期刊上发表。这种果实在大的单珠被种子周围形成厚厚的外壳，在形态上是相似的，但类似于被子植物的果实。一个来自北海道白垩纪的双孢子型生殖器官被归属于本氏植物的一朵花--苏铁(Cycadeoidella Ogura)(1930)。在这一发现之前，东亚从未描述过这种本尼迪亚花。这个保存完好的器官为更好地了解本尼特人的生殖生物学提供了重要而明确的证据。

The following results concerning the phylogeny of Angiosperms, Particularly relating extinct gymnosperms of preangiosperm stages have been obtained.1. A gymnospermous female fructification, which is supposed to be a new order, from the Cretaceous of Hokkaido will soon be published elsewhere in a scientific journal. This fructification develops a thick envelop around a large unitegmic seed, and is morphologically comparable, but analogous to the angiosperm fruit.2. A bisporangiate reproductive organ from the Cretaceous of Hokkaido was assigned to a flower of a bennettitalean plant, Cycadeoidella Ogura (1930). The bennetitalean flower has never been described from East Asia before this finding. This well-preserved organ provides important and unequivocal evidence for better understanding the reproductive biology of the bennettitaleans.