Solomon's Seal and his relatives with lots of variety for shady places, even quite dry for some of them. Addictive if you like subtle green and brown plants with a bit of pink!
As you will see from a quick browse many of the Polygonatums look very different to the common cottage garden plant. This doesn't make them difficult to grow or needing different conditions, some of the narrow leafed species (particularly Polygonatum verticillatum) are actually easier to grow! You may also find that the narrow leafed forms are much less susceptible to the dreaded grey caterpillars of Solomon's Seal Sawfly.
The ideal conditions for moist forms are a good, humousy, soil that doesn't dry out in shade. Having said that the tougher species will grow in a much wider range of condidtions and will take summer drought in their stride as they die down by midsummer to re-emerge the following spring.