Question: What is a genus of flowering plants in the Rubiaceae family, Ardisia and Rothmannia ?
Context: Anthorrhiza is a genus of myrmecophytic flowering plants in the Rubiaceae family.  It is endemic to Papua New Guinea, including the Louisiade Archipelago.  It is one of five ant-plant genera in the family Rubiaceae, the others being "Hydnophytum", "Myrmecodia", "Myrmephytum", and "Squamellaria". Psychotria is a genus of flowering plants in the Rubiaceae family.  It contains around 1,850 species and is therefore one of the largest genera of flowering plants.  The genus has a pantropical distribution and members of the genus are small understorey trees in tropical forests.  Some species are endangered or facing extinction due to deforestation, especially species of central Africa and the Pacific. Sabiceeae is a tribe of flowering plants in the Rubiaceae family and contains about 164 species in 7 genera.  Its representatives are found in tropical Africa, Madagascar, Sri Lanka, and from Mexico to tropical America.  The genus "Sabicea" is one of the rare genera in Rubiaceae that occurs both in tropical Africa and tropical America. The genus "Psychotria" is one of the largest genera of flowering plants and contains around 1850 species from the Rubiaceae family.  Detailed, up to date information can be found on "Psychotria" in the World Checklist of Rubiaceae. Rothmannia is a genus of flowering plants in the Rubiaceae family.  It was described in 1776 and is named for Göran Rothman (1739–1778) by Thunberg – both were pupils of Linnaeus.  The genus has a wide distribution area and is found tropical and southern Africa, western Indian Ocean, southern China to Indo-China and New Guinea. Coptosapelteae is a tribe incertae sedis of flowering plants in the Rubiaceae family and contains about 55 species in 2 genera.  Its representatives are found in tropical and subtropical Asia.  This tribe has not been placed within as subfamily of Rubiaceae, but is sister to the rest of the family. Rubieae is a tribe of flowering plants in the Rubiaceae family and contains 969 species in 14 genera.  The genus "Galium" is responsible for more than two thirds of the species in the tribe.  The second largest genus is "Asperula", which contains about 200 species.  Unlike the rest of the Rubiaceae family, the tribe contains predominantly perennial and annual herbs with pseudowhorls of leaves and leaflike stipules and is centered in temperate and tropical-mountain regions. Coptosapelta is a genus of flowering plants in the Rubiaceae family.  It is found in tropical and subtropical Asia.  The genus has not been placed within a subfamily and is sister to the rest of Rubiaceae. Virectaria is a genus of flowering plants in the Rubiaceae family.  The genus, known as "Virecta" until 1952, consists exclusively of tropical African species.  It is a Guineo-Congolian genus, having its highest diversity in Lower Guinea but it also occurs in the Zambezian Region.  Verdcourt provided a revision in which he defined five species but three more were added later.  In 2001, a detailed morphological and anatomical study of the genus was conducted and a taxonomic survey and a key to the species was provided. Ardisia (coralberry or marlberry) is a genus of flowering plants in the family Primulaceae.  It was in the former Myrsinaceae family now recognised as the myrsine sub-family Myrsinoideae.  They are distributed in the Americas, Asia, Australia, and the Pacific Islands, mainly in the tropics.  There are 400 to 500 species.
Answer: Rothmannia