Martensianthus
Martensianthus is a genus of flowering plants belonging to the family Rubiaceae.
It is native to southern Mexico.
The genus name of Martensianthus is in honour of Martin Martens, a Belgian botanist and chemist born in Maastricht, Netherlands.
It was first described and published in Acta Bot. Hung. Vol.53 on page 25 in 2011.