Well, a mandragora is a plant/root, as is Alura Une/Venus Weed. The Wikipedia "Legend" says a mandrake's fruit would be used to facilitate pregnancy, since the humanoid-shaped mandrake root is said to be the result of a hanged man ejaculating into the ground (a fun bit of info I first learned from the exceptional movie Flesh+Blood); also mentions witches "making love" to the root, producing offspring which have no feelings of real love. The Alraune story is similar, a girl born of artificial insemination. Suffers from "obsessive sexuality and perverse relationships." Alura Une is nude, and always had a very saucy "sex" appearance and allure (hence "Alura," I've always thought), but doesn't seem to harbor actual love. I don't think it's all that difficult to draw the comparisons, really.