The Collaborative International Dictionary of English v.0.48:

Trumpets \Trump"ets\, n. pl. (Bot.)
   A plant (Sarracenia flava) with long, hollow leaves.
   [1913 Webster]

WordNet (r) 3.0 (2006):

trumpets
    n 1: pitcher plant of southeastern United States having erect
         yellow trumpet-shaped pitchers with wide mouths and erect
         lids [syn: huntsman's horn, huntsman's horns, yellow
         trumpet, yellow pitcher plant, trumpets, Sarracenia
         flava]