Petals white, anthers purple, belonging to Central European forms.
Petals nearly white, slightly bluish, anthers yellowish-white, stigmata blackish-purple.
A cultivated plant self-seeding truly, which is strange.
Flowers and leaves smaller than in Central European plants.
Incorrectly labelled H. angulosa var. alba. Probably a natural infrageneric taxon
occurring somewhere. I would appreciate if somebody would identify
the plant.