Rhubarb cultivars have gained the Royal Horticultural Society’s Award of Garden Merit:- "Rhubarb" originally comes from the two Greek words for rhubarb. "Rheon" from the Persian "rewend", later became the Latin word "rheum", meaning rhubarb. The other Greek word is "rha", an ancient name for the Volga River in Russian, where rhubarb was cultivated, having been introduced there from China via the Silk Road. In medieval Latin, "rheon" and "rha" became "rheum barbarum", literally "foreign rhubarb" or "strange rhubarb", and evolved later into "rheubarbarum". Most likely, the English word "rhubarb" entered the language via the French word "rhubarbe" brought over by
White wagtail it still bears its original name of "Motacilla alba". The Latin genus name originally meant "little mover", but certain medieval writers thought it meant "wag-tail", giving rise to a new Latin word "cilla" for "tail". The specific epithet "alba" is Latin for "white". Within the wagtail genus "Motacilla", the white wagtail's closest genetic relatives appear to be other black-and-white wagtails such as the Japanese wagtail, "Motacilla grandis", and the white-browed wagtail, "Motacilla madaraspatensis" (and possibly the Mekong wagtail, "Motacilla samveasnae", the phylogenetic position of which is mysterious), with which it appears to form a superspecies. However, mtDNA cytochrome "b" and