having the root perennial but the stem annual, as perennial herbs.
Also rhi·zo·car·pic [rahy-zoh-kahr-pik] /ˌraɪ zoʊˈkɑr pɪk/.
Origin of rhizocarpous
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
(of plants) producing subterranean flowers and fruit
(of perennial plants) having roots that persist throughout the year but stems and leaves that wither at the end of the growing season
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012