"Calendula" (known as pot marigold) is grown commercially for herbal teas and potpourri. Marigold or Calendula is the flower associated with October. Limited evidence indicates "Calendula" cream or ointment is effective in treating radiation dermatitis. Seed of the introduced common chickweed ("Stellaria media") and capeweed ("Arctotheca calendula") are also consumed. Calendula and carrot oils are produced in this way. "Calendula" species have been used traditionally as culinary and medicinal herbs. "Calendula" flowers are a rich source of lutein, containing 29.8mg/100g. Calendula tea provides health benefits, as well as being delicious. The ruby-crowned kinglet ("Regulus calendula") is a very small passerine bird found throughout North America. The larvae feed on Asteraceae species, including "Calendula", "Achillea", "Anthemis" and "Ormenis". "Calendula" plants are known to cause allergic reactions, and should be avoided during pregnancy. Some scientists regarded it as "Calendula suffruticosa" subspecies "maritima". "Calendula" has been used traditionally for abdominal cramps and constipation. "Calendula" species have been used in cooking for centuries.