Yet another study adds Emplectocladus as a subgenus to the former.
ITIS recognises just the single genus Prunus, with an open list of species, shows that Exochorda-Oemleria-Prinsepia is somewhat separate from Prunus-Maddenia-Pygeum, and that, like the traditional subfamily Maloideae with apple-like fruits, all of these genera appear to be best considered within the expanded subfamily Amygdaloideae.
Prunus can be divided into two clades: Amygdalus-Prunus and Cerasus-Laurocerasus-Padus.
More recently, it has become apparent that Prunus evolved from within a much larger clade now called subfamily Amygdaloideae (incorrectly "Spiraeoideae").
Historical treatments break the genus into several different genera, but this segregation is not currently widely recognised other than at the subgeneric rank.
The edible part of the almond is the seed; the almond fruit is a drupe, not a true nut.
Prunus is a genus of trees and shrubs, which includes the plums, cherries, peaches, nectarines, apricots and almonds.Around 430 species are spread throughout the northern temperate regions of the globe.The fruit is a fleshy drupe (a "prune") with a single relatively large, hard-coated seed (a "stone").Within the rose family Rosaceae, it was traditionally placed as a subfamily, the Amygdaloideae (incorrectly "Prunoideae"), but was sometimes placed in its own family, the Prunaceae (or Amygdalaceae).Members of the genus can be deciduous or evergreen. The leaves are simple, alternate, usually lanceolate, unlobed, and often with nectaries on the leaf stalk.The flowers are usually white to pink, sometimes red, with five petals and five sepals. Flowers are borne singly, or in umbels of two to six or sometimes more on racemes.