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Genus Rubia
- type genus of the Rubiaceae; Old World herbs and subshrubs grown for their medicinal properties and for dye substances extracted from their roots
Genus Calycophyllum
- medium to large tropical American trees having shiny reddish-brown shredding bark
Genus Chiococca
- shrubs of tropical and subtropical New World
Genus Cinchona
- large genus of trees of Andean region of South America having medicinal bark
Genus Chinchona
- large genus of trees of Andean region of South America having medicinal bark
Genus Galium
- annual or perennial herbs: bedstraw; cleavers
Genus Gardenia
- large genus of attractive Old World tropical shrubs and small trees
Genus Genipa
- tropical American evergreen trees or shrubs bearing yellow flowers and succulent edible fruit with a thick rind