風乾保存野草種子発芽率の周年変化II

抄録

Changes of germinability of weed seeds during two years of air-dry storage were studied not noly for the 35 species treated in a previous paper but also for the additional 33 species. The species which did not germinate in the first year failed to germinate in the second year. This trend was found in Paederia scandens, Clematis apiifolia, C. Maximowiczianum, Trichosanthes cucumeroides, Villebrunea frutescens, Phryma leptostachya, Dioscorea japonica, Cardiocrinum cordatum, Arundinella hirta and Commelina communis among the 68 species. Thirty-two of the 58 species that germinated in the first year did not germinate in the second year, but 17 species indicated that the maximum germinability of the first year was more than 50 percent of that of the first year. Changes of seed germinability in the two years were classified into nine patterns on the basis of transitions of germination types from the first year to the second year.