Erythronium 'Pagoda' is a shade lover. This yellow-flowered form of the Dogs-tooth
Violet grows from tubers, and forms lush clumps of often marbled foliage in late March or early April, then the flowers emerge to give a wonderful display. The
plant disappears underground again from late summer though, so if you grow this, be sure to mark its place so that you don't put the spade through it!