Figure 7.

Historical biogeographic interpretation for the Ensatina complex. Five zones of secondary interaction are shown. 1, Interaction of klauberi and eschscholtzii. 2, Complex interaction between northern and southern platensis and of these interactors with xanthoptica in the central Sierra Nevada. 3, Interaction of oregonensis and northern platensis in the Lassen Peak area. 4, North Bay interaction of oregonensis and xanthoptica. 5, South Bay interaction of oregonensis and xanthoptica and of xanthoptica and eschscholtzii.