This dress is considered part of the Crinoline era because it has very deep flounces and tiers. It is off the shoulder and is covered in flowers. The crinoline period had a lot of spanish influence and that is where the flounces and the flowers originated from.
Day dress, 1850s, British, (Lancashire), one-piece blue-grey taffeta (changeable shot-silk) brocaded with a repeat of tiny dots and abstract devices, the bodice decorated with black cord, clear and black beads, long sleeve with narrow cap and two puffed bands, sleeve and full, pleated skirt hemmed in black velvet, hook closures with bound holes in silk, muslin lining. B-33, W-23, L-58. From Whitaker Auctions