Asarum sp. longirhizomatosum?

Not 100% sure of the naming of this species, maybe the national collection holder could confirm?

 

An attractive perennial which excels in deep shade. Rich apple green glossy foliage rather like Cyclamen but deeper green and deep veining, being resistant to all weathers. These are held on relatively long and chocolatey brown rhizomes which lay on the soil surface which adds to the interest. The flowers are strange in appearance like open mouthed bells which lay on their side at ground level. Colour is a pale pinkish colour.