A extremely rare species hailing from Eurasia in various pockets, from Spain all the way to Western Siberia, including Switzerland (Valais). This hardy perennial emerges in April, unfurling very fine fern-like leaves with buds on top, opening to 2-3” bright yellow flowers May into June.
Easily grown (once you get a hold of one!) in full sun to light shade – in hotter climates in light shade – best in a loamy soil and with average moisture, drought tolerant once established.
While there is some availability in Europe (I was exposed to them at the rightful age of 14, over 40 years ago), they are almost impossible to find in the US due to difficulty in multiplying them. These are large division in quart pots from our 20 year old clumps; considering the years put into it and he age/size of plants, the price is only nominal.