Wikipedia
The D'Anjou pear, sometimes referred to as the Beurré d'Anjou or simply Anjou, is a short-necked cultivar of European pear. The variety was originally named Nec Plus Meuris in Europe and the name Anjou or d'Anjou was erroneously applied to the variety when introduced to America and England. It is thought to have originated ito mid-19th century, in Belgium or France.
The two cultivars that comprised d'Anjou pears are the Green Anjou pear and the Red Anjou pear. The Green Anjou pear has a pale green skin that does not change color as the pear ripens, unlike most other cultivars of green pears, which turn yellow as they ripen. The Red Anjou pear originated as naturally occurring bud sport found on Green Anjou trees. Red Anjou pears are very similar to the original Anjou other than color.
The d'Anjou is considered a medium to large pear, typically around 270–285 grams, 85 mm in height, and 80 mm in diameter. It has a wide, globular base, short stem, and thin skin with many notable lenticels.
Because this pear does not show ripeness by color it is recommended to test the top near the step with a slight press of the thumb until it gives slightly. This is because the pear ripens from the inside out and the top is closest to the inside. It typically takes 3 to 5 days after purchase for the pear to ripen whereupon it may be refrigerated to slow (but not stop) the ripening giving you a couple more days to eat it.
In the United States, the variety was recommended for general cultivation by the American Pomological Congress in 1852, and as of 2004 represented 34% of reported U.S. pear production, with Oregon being the leading state.