Neat grassy tussocks (quite ornamental in themselves - rather like Hakonechloa) sprout multitudes of small but perfectly formed mauve flowers in June. A terrific little Evansia, related to I.cristata and verna but much much easier to grow and flower.
Seems more than happy so far in well-drained shade but I have the feeling it'll be quite adaptable elsewhere.
Another one of those plants I grow here that I look at and think Why on earth isn't everyone growing this?
10cm pots ~ £6