Anemonella thalictroides ‘Betty Blake’ (syn. A. t. ‘Double Green’) – is an unusual form of Rue Anemone, double green with lighter green highlights. It gently glows in the woodland garden with flowers held above the delicate Thalictrum-like foliage as implied in its species moniker. Site ‘Betty Blake in morning sun, dappled conditions to open shade. All Anemonella thalictroides prefer good draining woodland soil but will tolerate bony soil condition if the soil therein is rich. From tiny tubers.