The longevity of Nelumbo seeds, when kept in soil, is estimated to be 120 years or more.2. In spite of the presence of a large number of small pores in the seed-coat, the seeds did not absorb water and germinate even after eight months.3. The seeds, when filed before sowing, germinated without exceptionin a few days in spring time.
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Ichiro Ohga (1923) studied this question.
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