Cover Image Top left: Natural hybrids of Yezo spruce ( Picea jezoensis var. jezoensis ) and Sakhalin spruce ( Picea glehnii ) occur at low frequencies in this forest around bog in The University of Tokyo Hokkaido Forest, Furano, Hokkaido. Top right: Current‐year shoot of Yezo spruce (left), Sakhalin spruce (right), and their natural hybrid (center). Bottom left: A branch with ripe cones of Sakhalin spruce in Ochiishi, Nemuro, Hokkaido. Bottom right: A branch with ripe cones of Yezo spruce in the Uryu Experimental Forest, Hokkaido University, Horokanai, Hokkaido. All photos taken by Mineaki Aizawa. image
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