Question: Are Rajania and Rothmannia both types of plants?

full_context: Document 1: Thonningia: Thonningia is a monotypic genus of flowering plants in the family Balanophoraceae containing the single species Thonningia sanguinea. It is distributed throughout much of southern and western Africa, particularly the tropical regions. Common names for the plant include ground pineapple. A familiar plant to humans, it has an extremely long list of common names in many African languages. Many names are inspired by the resemblance of the plant's inflorescence to a pineapple or palm tree. Some of the names can be translated as pineapple of the bush (from Anyi), duiker's kolanut (from Igala), and crown of the ground (from Yoruba).
Document 2: Thunbergia: Thunbergia is a genus of flowering plants in the family Acanthaceae, native to tropical regions of Africa, Madagascar and southern Asia. "Thunbergia" species are vigorous annual or perennial vines and shrubs growing to 2-8 m tall. The generic name honours Carl Peter Thunberg.
Document 3: Roystonea regia: Roystonea regia, commonly known as the Cuban royal palm or the Florida royal palm is a species of palm which is native to Mexico and parts of Central America and the Caribbean. A large and attractive palm, it has been planted throughout the tropics and subtropics as an ornamental tree. Although it is sometimes called "R. elata", the conserved name "R. regia" is now the correct name for the species. Populations in Cuba and Florida were long seen as separate species, but are now considered to belong to a single species.
Document 4: Roystonea dunlapiana: Roystonea dunlapiana, commonly known as yagua or cabiche is a species of palm which is native to Nicaragua, Honduras, and southern Mexico (Chiapas, Campeche, Quintana Roo, Tabasco, Veracruz). It is the only species in the genus "Roystonea" which is absent from the insular Caribbean.
Document 5: Manettia: Manettia is a genus of flowering plants in the family Rubiaceae. There are between 80 and 123 species. They are distributed in the West Indies, Mexico, and Central and South America. Most are vines. The genus was named after Saverio Manetti.
Document 6: Roystonea: Roystonea is a genus of eleven species of monoecious palms, native to the Caribbean Islands, and the adjacent coasts of Florida and Central and northern South America. Commonly known as the royal palms, the genus was named for Roy Stone, a U.S. Army engineer. It contains some of the most recognizable and commonly cultivated palms in tropical and subtropical regions.
Document 7: Dioscorea orangeana: Dioscorea orangeana, is a tuberous vining flowering plant in the genus "Dioscorea", endemic the Forêt d’Orangea near Antsiranana in Madagascar, from which it derives its name. The tuber is possibly edible, and unlike most other "Dioscorea" species, the tuber has many finger-like lobes as opposed to a single tuber. Because the plant is new to science and the possible harvesting by local populations, the conservation status of "Dioscorea orangeana" is of great concern.
Document 8: Renealmia alpinia: Renealmia alpinia is a flowering plant species native to the Americas, where it grows from southern Mexico through much of South America, though not in the Southern Cone. It can also be found on several Caribbean islands.
Document 9: Rotheca myricoides: Rotheca myricoides (Butterfly Bush) is a species of flowering plant in the family Lamiaceae. It is native to Africa and widely cultivated elsewhere. In cultivation, it is frequently known by one of its synonyms, such as "Clerodendrum myricoides" or "Clerodendrum myricoides" 'Ugandense'.
Document 10: Cyrtandra (plant): Cyrtandra is a genus of flowering plants containing about 600 species, with more being discovered often, and is thus the largest genus in the family Gesneriaceae. These plants are native to Southeast Asia, Australia, and the Pacific Islands, with the centre of diversity in Southeast Asia and the Malesian region. The genus is common, but many species within it are very rare, localized, endangered endemic plants. The species can be difficult to identify because they are highly polymorphic and because they readily hybridize with each other. The plants may be small herbs, vines, shrubs, epiphytes, or trees. The genus is characterized in part by having two stamens, and most species have white flowers, with a few red-, orange-, yellow- and pink-flowered species known. Almost all species live in rainforest habitats.
Document 11: Rothmannia: 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.
Document 12: Rajania: Rajania is a genus of plants in the Dioscoreaceae. It is native to the West Indies, with 14 of the 17 known species found in Cuba.
Document 13: Croton (plant): Croton is an extensive flowering plant genus in the spurge family, Euphorbiaceae. The plants of this genus were described and introduced to Europeans by Georg Eberhard Rumphius. The common names for this genus are rushfoil and croton, but the latter also refers to "Codiaeum variegatum". The generic name comes from the Greek κρότος ("krótos "), which means "tick" and refers to the shape of the seeds of certain species.
Document 14: Rehmannia: Rehmannia is a genus of six species of flowering plants in the order Lamiales, endemic to China.
Document 15: Roystonea stellata: Roystonea stellata is a species of palm endemic to Yagruma terrace in the Maisí region of Guantánamo Province in eastern Cuba. The species is known from only a single collection made by French-born botanist Frère León in 1939, and may be extinct.
ground_truth: yes