Deguen, R., Mercado, M.I., Coll Áraoz, V.M., Ruiz, A.I. and Ponessa, G.I. 2012. Morphology and anatomy of two varieties of Begonia cucullata (Begoniaceae), marketed as ‘agrial’ in Paraguay. Lilloa. 49, 2 (Dec. 2012), 87–97.