The Red Rose of Lancaster (a rose gules) is the county flower of Lancashire.
The exact species or cultivar which the red rose relates to is uncertain, but it is thought to be Rosa gallica officinalis.
The rose was first adopted as an heraldic device by the first Earl of Lancaster. It was one of the badges of Henry IV of England, the first king of the House of Lancaster. Following the Battle of Bosworth in 1485, it became the emblem of Lancashire .
Lancaster's Red Rose (also known as Apothecary's Rose, Old Red Damask and Rose of Provins) is an official variety and is possibly the first cultivated rose. The rose grew wild throughout Central Asia and was discovered by the ancient Persians and Egyptians. Later adopted by the Romans, who introduced it to Gaul (France) where it assumed the name Rosa gallica. It is documented that Charlemagne's court exploited the rose as a perfume. The rose was also appreciated for its medical value and was utilized in countless medical remedies.
The Red Rose of Lancaster derives from the gold rose badge of Edward I of England. Other members of his family used variants of the royal badge, with the king's brother, the Earl of Lancaster, using a red rose. It is believed that the Red Rose of Lancaster was the House of Lancaster's badge during the Wars of the Roses. Evidence for this "wearing of the rose" includes land tenure records requiring service of a red rose yearly for a manor held directly from Henry VI of England. There are, however, doubts as to whether the red rose was actually an emblem taken up by the Lancastrians during the Wars of the Roses. Adrian Ailes has noted that the red rose “probably owes its popular usage to Henry VII quickly responding to the pre-existing Yorkist white rose in an age when signs and symbols could speak louder than words."