A beautiful rainbow cactus.Licensed from iStockPhoto
nounThe American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Either of two spiny cylindrical varieties of cactus of the southwestern United States and Mexico, Echinocereus pectinatus var. neomexicanus, having yellow flowers, or E. pectinatus var. rigidissimus, having showy magenta flowers.