Figure 8

Phyllotaxis and branching in annual shoots of roble plants. (A,B) Distichous (2) or tristichous (3) phyllotaxis; (C,D) with an immediate or differed branch or with no branch in each axillary position. Nodes counted from the proximal end of the annual shoot. Plants from Lagunas de Epulauquen and Quila Quina are shown separately.