The PFGD database contains a large number of important flowering genes of 837 published angiosperms, including 80,810 photoperiod pathway genes, 34,373 sugar pathway genes, 30,396 temperature pathway genes, 27,451 vernalization pathway genes, 22,839 aging pathway genes, 73,286 autonomous pathway genes, 29,511 circadian clock pathway genes, 24,707 hormone pathway genes, and 10,155 ABCDE model genes.