Gentian :: Gentian (n.) 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..
Gentianaceous :: Gentianaceous (a.) Of or pertaining to a natural order of plants (Gentianaceae) of which the gentian is the type.