Studies on Protomonimia and its evolutionary sighnificance on the origin of Angiosperms.

1. Nishida， N.发现了北海道上白垩纪的几种果实。在针叶球果方面，他发现了杉木科的Parataiwania、Paraglyptostrobus和Yezosequoia 3个新属，松科的雪松和松类球果，柏科的2个新属。至于双子叶科的果实，他察看了一种神秘的果实，它的中间有一条缝，只有一颗种子。这颗种子是迄今为止在白垩纪发现的最大的种子。田村考虑了花的解剖，特别是心皮，多果科的心皮，原毛虫似乎属于。Yamashita研究了禾本科和商业本科植物的胚胎发生，特别是根的发育，并在1987年7月在柏林举行的植物学大会专题讨论会上发表了演讲。Kadono研究了花和昆虫的共同进化，并考虑了化石植物的授粉生态学。他还通过上述研究推测了原殖螨的传粉模式。上田考虑了多carpicae的地理。他认为与原毛蕊虫有亲缘关系的Monimiaceae可能是冈瓦纳陆的元素之一，并讨论了原毛蕊虫在北半球存在的意义。Nishida， M.重建了原血原体的大体形态和花的脉管系统（Nishida， H. and M. Nishida, 1988,in press）。

1. Nishida, N. found out several fructifications from the Upper Cretaceous of Hokkaido. As for coniferous cones, he recognized 3 new genera, Parataiwania, Paraglyptostrobus and Yezosequoia, of the Taxodiaceae, cedroid and pinoid cones of the Pinaceae, and two genera of the Cupressaceae. As for fruit of the dicotyledonae, he examined a mysterious fruit bearing a suture in the yentral side and only one seed. Theis seed is the largest one found from the Cretaceous so far.2. Tamura considered about floral anatomy, especially carpels, of the Polycarpicae to which Protomonimia seems to belong.3. Yamashita examined embryogenese, especially development of the root, of the Gramineae and Commerinales and gave a lecture in the simposium of the Botanical Congress held at July, 1987 in Berlin.4. Kadono studied co-evolution between flower and insect and considered pollination-ecology of the fossil plants. He also speculated pollination pattern of Protomonimia through the studies mentioned above.5. Ueda considered geography of the Polycarpicae. He thought the Monimiaceae with which Protomonimia seems to have affinities would be one of the elements of Gondwana land andd discussed on the significance of existance of Protomonimia in the Northern hemisphere.6. Nishida, M. reconstructed gross morphology and floral vasculature of Protomonimia (Nishida, H. and M. Nishida, 1988,in press).