(Jimmy of the Clue Crew shows a plant diagram on the monitor.)  Similar to a root, it's the botanical term for a thick, horizontal underground stem from which shoots develop into new plants
Literary Analysis: The 
Short... [DOC] [TLE] 3rdTaro Symposium 3rdTaro Symposium - Edible Aroids [PAR] Taro research and development - Progress since the last Taro Symposium .... for 
the Pacific Agricultural Plant Genetic Resources Network (PAPGREN), ...... are 
genetically similar, again suggesting that crossing between plants has not been 
common.