Geranium wilfordii maxim(Laoguan Cao in Chinese, Laoguan refers to an old stork). It's named after a bird and is related to Sun Simiao, a Chinese physician of the Sui and Tang dynasty.

According to the legend, Sun Simiao travelled to Sichuan Province and provided medical service to people. Sichuan basin is moist so that many people suffered from rheumatism. Once when he went into the mountain to gather herbs, Sun Simiao found an old stork was pecking at a blade of grass. He observed for several days and found that the old stork became more and more healthy.

Sun Simiao picked the herb back for treatment and it cured the villagers of their rheumatism. The villagers asked Sun Simiao to name it. Considering that he discovered the herb through an old stork, he named it "Laoguan Cao"(Geranium wilfordii maxim).