Question: which genus of flowering plants that is endemic to Australia ,Plumeria or Derwentia ?

full_context: Document 1: River Derwent (Tasmania): The Derwent River is a river located in Tasmania, Australia. The river rises in the state's Central Highlands and descends more than 700 m over 200 km , flowing through Hobart, the state's capital city, before emptying into Storm Bay and flowing into the Tasman Sea. The banks of the Derwent were once covered by forests and occupied by Tasmanian Aborigines. European settlers farmed the area and during the 20th century many dams were built on its tributaries for the generation of hydro-electricity. The River Derwent Starts at Lake St Clair.
Document 2: Brugmansia: Brugmansia is a genus of seven species of flowering plants in the family Solanaceae. They are woody trees or shrubs, with pendulous flowers, and have no spines on their fruit. Their large, fragrant flowers give them their common name of angel's trumpets, a name sometimes used for the closely related genus "Datura". (Datura differs from Brugmansia in that they are herbaceous bushes, with erect rather than pendulous flowers - and most have spines on their fruit).
Document 3: Plumeria: Plumeria ( ) is a genus of flowering plants in the dogbane family, Apocynaceae. Most species are deciduous shrubs or small trees. The species variously are indigenous to Mexico, Polynesia, Central America, and the Caribbean, and as far south as Brazil, but are grown as cosmopolitan ornamentals in warm regions. Common names for plants in the genus vary widely according to region, variety, and whim, but frangipani or variations on that theme are the most common. Plumeria also is used directly as a common name, especially in horticultural circles.
Document 4: Plumeria rubra: Plumeria rubra is a deciduous plant species belonging to the genus "Plumeria". Originally native to Mexico, Central America, Colombia and Venezuela, it has been widely cultivated in subtropical and tropical climates worldwide and is a popular garden and park plant, as well as being used in temples and cemeteries. It grows as a spreading tree to 7 – high and wide, and is flushed with fragrant flowers of shades of pink, white and yellow over the summer and autumn. Its common names include frangipani, red paucipan, red-jasmine, red frangipani, common frangipani, temple tree, or simply plumeria.
Document 5: Drosera aberrans: Drosera aberrans is a perennial tuberous species in the genus "Drosera" that is native to New South Wales, South Australia, and Victoria. It grows in a rosette 3 to 5 cm in diameter with green, orange-yellow, or red leaves. It is native to southern inland South Australia, southern and central Victoria, and one single collection from New South Wales. It grows in a variety of soils from sand to laterite gravel and limestone clay in mallee woodland, heathland, and open forests. It flowers from July to September.
Document 6: Darwinia (plant): Darwinia, sometimes commonly known as mountain bells or simply bells, is a genus of about 70 species of evergreen shrubs in the family Myrtaceae, endemic to southeastern and southwestern Australia. The majority are native to southern Western Australia, but a few species occur in South Australia, New South Wales and Victoria. The genus was named in honour of Erasmus Darwin, grandfather of Charles Darwin by Edward Rudge in 1816. Most darwinias grow to a height of between 0.2 and 3 m and many are prostrate shrubs. Most have small, simple leaves and the flowers are often grouped together, each flower with five red, white or greenish petals and ten stamens. In many species, the flowers are surrounded by large, colourful bracts, giving rise to their common names.
Document 7: Darwinia diosmoides: Darwinia diosmoides is a shrub which is endemic to the south-west of Western Australia. It usually grows to between 0.3 and 1.2 metres in height and produces white flowers. The species was formally described in 1828 by Swiss botanist Augustin Pyramus de Candolle who gave it the name "Genetyllis diosmoides". It was transferred to the genus "Darwinia" in 1865 by English botanist George Bentham.
Document 8: Veronica derwentiana: Veronica derwentiana (Derwent speedwell ) is a flowering plant species of the family Plantaginaceae, endemic to south-eastern Australia. It is sometimes included in the genus "Parahebe" or "Derwentia". It is a woody herb which grows to 140 cm high. Leaves are 5 to 20 cm long, with a cuneate, truncate or cordate base and toothed margins. The flowers are white, pale lilac or pale blue and appear in 5 to 20 cm long racemes of 40 to 100 flowers in summer. The species occurs in a variety of habitats including eucalypt forest and alpine herbfields in Queensland, New South Wales, Victoria, Tasmania and South Australia. It is often seen on disturbed sites.
Document 9: Nerium: Nerium oleander is a shrub or small tree in the dogbane family Apocynaceae, toxic in all its parts. It is the only species currently classified in the genus Nerium. It is most commonly known as nerium or oleander, from its superficial resemblance to the unrelated olive "Olea". It is so widely cultivated that no precise region of origin has been identified, though southwest Asia has been suggested. The ancient city of Volubilis in Morocco may have taken its name from the Berber name "oualilt" for the flower. Oleander is one of the most poisonous commonly grown garden plants.
Document 10: Bauhinia divaricata: Bauhinia divaricata is a species of flowering shrub of the family Fabaceae. "B. divaricata" is the type species of the genus "Bauhinia". One common name for this species is pom pom orchid tree. It is native to China, Jamaica, India and also grows in the southern half of Florida. It has white bi-lobed leaves that alternate.
Document 11: Thevetia: Thevetia is a genus of flowering plants in the dogbane family, Apocynaceae, first described for modern science as a genus in 1758. It is native to Mexico, Central America, South America, and Cuba. The taxonomy of the genus is controversial, with some authors including "Cascabela" within "Thevetia", while others accept the two genera as separate.
Document 12: Hymenosporum: Hymenosporum flavum, or native frangipani, is a rainforest tree which is native to Queensland and New South Wales in Australia and New Guinea. It is the sole species within the genus Hymenosporum, and is closely related to the widespread genus Pittosporum.
Document 13: Derwentia (plant): Derwentia was a genus of flowering plants that is endemic to Australia.
Document 14: Plumeria obtusa: Plumeria obtusa, the Singapore graveyard flower, is a species of the genus "Plumeria" (Apocynaceae). It is native to the West Indies including Bahamas; southern Mexico, Belize, Guatemala, and Florida. but widely cultivated for its ornamental and fragrant flowers around the world, where suitably warm climate exists. It is reportedly naturalized in China.
Document 15: Diocirea: Diocirea is a genus of flowering plants in the figwort family, Scrophulariaceae. The genus is endemic to a small area in the south-west of Western Australia and is intermediate in character between "Eremophila" and "Myoporum". There are four members of the genus, all of which are small shrubs with stems and leaves which produce a resin making the plants appear bluish-green. Neither the genus, nor any of the species had been described before 2007 although a few specimens had been collected as "Eremophila elachantha". Despite their limited distribution, they often occur in populations of several thousand individual plants, forming a dense ground cover.
ground_truth: Derwentia