Native Range Northern and southern Mexico, Central America, and South America. Plant Description Perennial/biennial, 40-150cm height, purple flowers in a spike, opposite leaves and branches. External Resources GBIF Link GBIF Species Page USDA Plants Database USDA Plants Database page U.S. National Germplasm Resources Information Network (GRIN) US National Germplasm Database Additional Web Resources Jepson eFlora These links will open new browser tabs.