Abstract
Time of flower bud differentiation in 18 lily species native to Japan was surveyed and the species classified into 4 groups as follows.
Type 1-a. L. rubellum and L. dauricum. Flower buds were initiated in early fall and completed in early winter within bulbs, before sprouting.
Type 1-b. L. concolor var. pulchellum (Chosenhimeyuri), L. japonicum, L. maculatum (native to Sadoga-shima) and L. hansonii. Flower buds were initiated in late fall within bulbs, before sprouting and completed next spring when the plants sprouted from the ground.
Type 2-a. L. longiflorum, L. alexandrae, L. nobilissimum, L. speciosum, L. auraturn, L. platyphyllum, L. leichtlinii var. maximowiczii, L. medeoloides, L. callosum, L. brownii, L. concolor (Tosahimeyuri) and L. maculatum (native to Miyake-jima). Flower buds were initiated just after sprouting.
Type 2-b. L. lancifolium and L. henryi. Flower buds were initiated about one month after sprouting.
