The specific epithet means low-growing or dwarfish. Genus name honors Jean de la Ruelle, French herbalist and physician to king of France. Features tubular, bell-shaped petunia-like flowers. Can be aggressive. Seeds maturing on plant can pop and fly up to 10 feet.
 
Sow in late fall 1/8th inch deep or in spring after a period of cold, moist stratification for 60 days. Plant when temps are consistently above 50 degrees.