Kunststricken: Große und kleine Decken (2004 republication) picture p 3, directions p 3, charts 2A and B.

Source calls for 35g ‘feine bastfarbene Häkelkunstseide’ (fine bast(?)-colored Crochet Rayon) on needles size 4/0 (Old German size?) for a rectangle 34cm wide and 40cm long.

Not the same Niebling Schlüsselblume that appears in Meyers Handarbeitsheft Nr. 14, Kunststricken

Just about identical to Herbstzeitlose in the same book. Herbsteitlose has an additional repeat, making it longer.