Gentian /(jĕn"shan [or] jĕn"shĭ*an)/

Gen·tian

Gentian

n.
  1. Any one of a genus (Gentiana) of herbaceous plants with opposite leaves and a tubular four- or five-lobed corolla, usually blue, but sometimes white, yellow, or red. See Illust. of Capsule. (Bot.)

Phrases & Compounds
Horse gentian
fever root.
Yellow gentian
the officinal gentian (Gentiana lutea). See Bitterwort.