red chamomile
noun
Any of several plants of the genus Adonis, especially pheasant's eye, A. annua, a weed with bright red flowers and leaves like those of chamomile, formerly frequent in cornfields of southern England but now more commonly grown as an ornamental.
Origin
Early 17th century; earliest use found in Randle Cotgrave (fl. 1587–?1630), lexicographer.