Plums come in a wide variety of colours and sizes. Some are much firmer-fleshed than others and some have yellow, white, green or red flesh, with equally varying skin colour.
Plum species in use today include:
When it flowers in the early spring, a plum tree will be covered in blossom, and in a good year approximately 50% of the flowers will be pollinated and become plums. If the weather is too dry the plums will not develop past a certain stage, but will fall from the tree while still tiny green buds, and if it is unseasonably wet or if the plums are not harvested as soon as they are ripe, the fruit may develop a fungal condition called brown rot. Brown rot is not toxic, and very small affected areas can be cut out of the fruit, but unless the rot is caught immediately the fruit will no longer be edible.
In June 21, 1964, the Legislative Yuan of the Republic of China declared plum blossom to be the national flower. To the Taiwanese, the five petals flowers symbolize the five major nationalities of China (the Han, Manchu, Mongol, Hui, and Zang), and the five virtues (humanity, loyalty, ritual, wisdom, and trust).
Plum was a nickname for P. G. Wodehouse.