Rubia tinctorum and Rubiaceous plant

Rubia tinctorum noun - Eurasian herb having small yellow flowers and red roots formerly an important source of the dye alizarin.

Rubiaceous plant and Rubia tinctorum are semantically related. In some cases you can use "Rubiaceous plant" instead a noun phrase "Rubia tinctorum".

Rubiaceous plant noun - Any of numerous trees or shrubs or vines of the family Rubiaceae.

Rubia tinctorum and rubiaceous plant are semantically related. Sometimes you can replace phrase "Rubia tinctorum" with "Rubiaceous plant", this phrases are similar.