Sphagneticola calendulacea is a perennial herb in the genus Sphagneticola. It is found in China, India, Indonesia, Japan, Myanmar, Philippines, Sri Lanka, Thailand, Taiwan,Bangladesh and Vietnam. Tolerant to drought, humidity and barren environment, S. calendulacea is a common herbaceous plant in China and Taiwan. S. calendulacea produces wedelolactone and demethylwedelolactone.