Diversity of wild pears. Top left: Pyrus fedorovii in habitat (Prov. Vayotz Dzor, Herher gorge, Armenia). Top right: Flowers of P. spinosa. Bottom left: P. salicifolia (middle) and P. caucasica in habitat (Mtsheta-Mtianeti, Georgia). Bottom right: fruits of a P. salicifolia X P. demetrii hybrid. Photographs by Gerald Parolly. See Korotkova et al., pp. 35–47 in this issue.