Louise Fernande de Bourbon, Duchesse Montpensier by Lejeune
From Wikimedia; spots removed with Photoshop and sepia tone removed by gogm.
Wikimedia dates this to ca. 1880, but the fullness of the skirt and elaborate layers of skirt trimmings suggest this photo dates to the early 1870s.
Keywords: Lejeune, Luisa Fernanda, Borbón family, Orléans family, Princess, Duchess, French, straight coiffure, floral headdress, high neckline, neckline ruff, long close accordion sleeves, cuffs, over-skirt, bustle, under-skirt, ruching, flounces, floral bodice ornament, floral skirt ornament, necklace, earrings, bracelets