Figure 1.

A cross section of EC I, Lower Nahal Oren, Mount Carmel, Israel. Note the plant formation on opposite slopes. The green lush European temperate cool-mesic NFS, sharply contrasts with the open park forest of warm-xeric, tropical African-Asian savanna on the SFS. The histograms show the levels of HIP1 genetic polymorphism in N. linckia in each of six stations at EC: stations 1–3 on the SFS and 5–7 on the NFS. Note the extraordinary divergence among stations (T. Krugman, N. Satish, O. N. Vinogradova, A. Beharav, Y. Kashi, and E.N., unpublished work; see also Fig. 4, which is published as supplemental data on the PNAS web site, www.pnas.org).