(Prunus dulcis)
Rosaceae family
Almonds are native to the Mediterranean, where wild almond trees are common. In most cases, these are escapes from abandoned cultivated orchards. Almonds, being largely cross-pollinated, will hybridize with wild trees when grown near wild almonds. Wild almonds differ from domesticated ones mainly in that the latter have a dominant gene that suppresses the formation of bitter cyanide in the seed. Almonds have since been selected from seedlings that produced larger, thinner-shelled fruit, and which had a greater tolerance for self-pollinating. Because almonds are naturally adapted to drier growing conditions, many growers now are grafting almonds onto moisture-tolerant peach rootstocks in order to produce higher yields under irrigated, high-fertility conditions.