belonging to the Rubiaceae, the madder family of plants.
Compare madder family.
Origin of rubiaceous
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
of, relating to, or belonging to the Rubiaceae, a widely distributed family of trees, shrubs, and herbaceous plants that includes the coffee and cinchona trees, gardenia, madder, and bedstraws
Word Origin for rubiaceous
C19: from New Latin Rubiaceae, from Latin rubia madder, from rubeus red
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