Although Valentine’s Day has passed, there’s still plenty of romance left in town. Boston Ballet’s production of Val Caniparoli’s Lady of the Camellias (refer to listing, page 13) at the Boston Opera House turns up the passion beginning February 26. The tale, based on the 19th-century novel by French writer Alexandre Dumas and set to the music of Chopin, follows the tragic affair of Marguerite, a Parisian courtesan, and country gentleman Armand, who persuades his love to renounce her life in the city and move to the countryside. The story has been adapted many times, most famously as the Verdi opera La Traviata and Baz Luhrmann’s 2001 film Moulin Rouge!