Plants that flower in winter are few and far between but there are some good choices for winter foliage.  Arum italicum is the continental variant of our native Arum maculatum; both have the useful characteristic of growing in the deepest, driest shade. 

 A. italicum has glossy marbled leaves from autumn through winter. The intriguing spadex flower appears in spring which becomes a spike of bright red/orange berries in late summer. NB Arums contain toxins and the berries are known to be particularly poisonous. 

 I bought a pot of A. italicum at a boot sale on Sunday. The lady I bought it from is there most weeks and announces her presence by calling out "Buy my lovely plants". Only a fiver which is excellent value since I got a dozen or so divisions out of it. Usually sold as a clump this is in fact a bulbous species and simple to divide by carefully teasing apart the root ball. Each bulb will form its own clump up over time.