SCREW n.
of about thirty species of tropical shrubs, with simple leaves and spirally twisted, five-celled capsules; -- also called twisted-horn, and twisty. -- Screw valve, a stop valve which is opened or closed by a screw. -- Screw worm (Zoöl.), the larva of an American fly (Compsomyia macellaria), allied to the blowflies, w…
SCROPHULARIACEOUS a.
crophulariaceæ, or Scrophularineæ), usually having irregular didynamous flowers and a two-celled pod. The order includes the mullein, foxglove, snapdragon, figwort, painted cup, yellow rattle, and some exotic trees, as the Paulownia.