rattail cactus definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
a small, often cultivated cactus (Aporocactus flagelliformis) with weak, cylindrical, creeping or drooping stems, native to Mexico and Central America
rattail cactus definition by American Heritage Dictionary
or rat's tail cactusnoun
A Mexican cactus (Aporocactus flagelliformis) having thin, creeping or hanging stems and brilliant crimson-pink flowers.