It's hard to imagine something more elegant than these when they flower in spring. They are especially wonderful in big clumps as in the pics above
My guess is that the price of the tubers(as compared to other spring blooming bulbs) prevents them from being as common as they deserve to be.
The deer occasionally nibble these for me, but have never damaged them severely. I used to have a lot of what I now believe is Erythronium 'White Beauty' (it was sold to me as something else) but voles ate most of them one spring. I had started with just a single tuber and had over fifty at the time they became vole dinner. They were growing in a rather cool spot close to a pond and thriving, but as I moved the few survivors away from the voles they ended up in an area that was too dry and hot for them (I have a sandy soil) and they have never been as good nor beautiful since. I really miss those big clumps and are now relocating the tubers again as well as adding a few other cultivars in hope of being able get big clumps again.
Everyone with a suitable spot should try these. As an additional bonus to the superb flowers, the beautiful foliage (for the varieties I tried and in my conditions) tends to die away quicker than most spring blooming bulbs, so is fairly easy to combine with other plants and is only messy for a very short period.