Day 16
Day 16. The first trifoliate leaf (star) (3 leaflets that are joined together) starts to unfold. Note: there are 2 axillary buds (arrow) and a tightly folded second trifoliate leaf. The folded second trifoliate leaf is covering the terminal (apical) meristem. The two buds will stay dormant and soon the second trifoliate will start to unfold and reveal the terminal meristem.
Figure 27. First trifoliate leaf. The first trifoliate leaf (star), two axillary buds and a tightly folded second trifoliate leaf (arrow) on a red kidney bean plant. Credit: E.T. Paparozzi and M.E. Conley