1.  closed gentian(n = noun.plant) blind gentian, gentiana clausa - similar to Gentiana andrewsii but with larger flowers;
is a kind of gentian

2.  closed gentian(n = noun.plant) blind gentian, bottle gentian, gentiana andrewsii - gentian of eastern North America having tubular blue or white flowers that open little if at all;
is a kind of gentian

american gentian, blind gentian, bottle gentian, closed, closed book, closed chain, closed circuit, closed corporation, closed couplet, closed curve, closed fracture, closed in, closed interval, closed loop, closed minded, closed primary, closed session, closed shop, closed universe, explorer's gentian, five-flowered gentian, fringed gentian, gentian, gentian family, gentian violet, great yellow gentian, green gentian, horse gentian, marsh gentian, prairie gentian, simple closed curve, soapwort gentian, spurred gentian, stiff gentian, striped gentian, tufted gentian, tulip gentian