Avocado as a diminutive in Australian English, a clipped form, "avo", has since become a common colloquialism in South Africa and the United Kingdom. It is known as "butter fruit" in parts of India and goes by the name "bơ" [ɓɘː] in Vietnamese, which is the same word that is used for butter. In eastern China, it is known as "è lí" ("alligator pear") or "niú yóu guǒ" ("butter fruit"). In Taiwan, it is known as "luò lí" or "cheese pear". The subtropical species needs a climate without frost and with little wind. High winds reduce the humidity, dehydrate the flowers,
Pear pears grown in English medieval gardens suggest that their reputation, at the least, was French; a favored variety in the accounts was named for Saint Rule or Regul', Bishop of Senlis. Asian species with medium to large edible fruit include "P. pyrifolia", "P. ussuriensis", "P. × bretschneideri", "P. × sinkiangensis", and "P. pashia." Other small-fruited species are frequently used as rootstocks for the cultivated forms. According to Pear Bureau Northwest, about 3000 known varieties of pears are grown worldwide. The pear is normally propagated by grafting a selected variety onto a rootstock, which may be of a pear variety or