An illustration of the fruit of a date palm, a date. The fruit is a drupe known as a date. They are oval-cylindrical, 3–7 cm long, and 2–3 cm diameter, and when unripe, range from bright red to bright yellow in colour, depending on variety. Dates contain a single seed about 2–2.5 cm long and 6–8 mm thick. Three main cultivar groups of date exist; soft (e.g. ‘Barhee’, ‘Halawy’, ‘Khadrawy’, ‘Medjool’), semi-dry (e.g. ‘Dayri’, ‘Deglet Noor’, ‘Zahidi’), and dry (e.g. ‘Thoory’). The type of fruit depends on the glucose, fructose and sucrose content.
L. Brent Vaughan Hill's Practical Reference Library Volume II (NewYork, NY: Dixon, Hanson and Company, 1906)