Estimation of chronological age for sporophyte maturation in three semi-evergreen ferns in Hokkaido

作者: Toshiyuki Sato

DOI: 10.1007/BF02348463

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摘要: To elucidate the life cycle time schedule of semi-evergreen ferns at natural sites in Sapporo, chronological age for sporophyte maturation was estimated from increase number veins (NV, midrib branches) overwintered to newly expanded leaves. The measurements were conducted on populations ofPolystichum braunii, Polystichum tripteron andDryopteris crassirhizoma altitudes 50–650 m Mt. Teine compare interspecific sporophytes. mean be 7.6 yr forP. 16.5 and 12.6 forD. crassirhizoma. minimum ages (1% fertility rate) ofP. P. andD. 5.8, 11.0 7.9 yr, respectively. shortest braunii longest tripteron. a species thus seems differ according altitude habitat, that present three influenced by geographical location distribution.

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