Plants named in 1983

Pinus tecunumanii is a timber tree native to Mexico and Central America. It grows from the highlands of Chiapas and Oaxaca through Guatemala, Belize, El Salvador, Honduras to Nicaragua (17° to 14° North latitude). It occurs in two separated populations in their native habitats. The high-altitude group grows at 1500–2900 m, and the low-altitude group at 500–1500 m. The wood is yellowish. This species has been cultivated in several subtropical parts of the world for the paper industry. Cultivation trials have shown that high-elevation sources are the most productive. It grows well in Colombia,

Kunzea ericoides, commonly known as kānuka or white tea-tree, is a tree or shrub in the myrtle family, Myrtaceae and is endemic to New Zealand. It has white or pink flowers similar to those of Leptospermum and from its first formal description in 1832 until 1983 was known as Leptospermum ericoides. The flowers have five petals and up to 25 stamens which are mostly longer than the petals.

Trichosalpinx, commonly known as the bonnet orchid, is a genus of neotropical orchids containing 38 species. The genus is widespread across most of Latin America from northern Mexico to Bolivia, as well as the West Indies. Trichosalpinx is characterized by the presence of a ringed, ribbed sheath around the stem. The generic name means "trumpet with hair" and refers to this ring. The genus formerly included over 100 species. Phylogenetic studies concluded that the genus as formerly circumscribed to be polyphyletic, and in 2023 many species were placed in the newly-described genus Karma.

Pinus jaliscana, the Jalisco pine, is a species of conifer in the family Pinaceae. It is endemic to southwestern Mexico, native to the Pacific slopes of the Sierra Madre del Sur within western Jalisco state, with populations in the Sierra de Cuale and Sierra el Tuito and south of Villa Purificación from 700 to 2,000 meters elevation. It is threatened by habitat loss.

Krameria lappacea, commonly known as para rhatany and Peruvian rhatany, is a plant species in the genus Krameria, native to Ecuador, Peru, Bolivia, northern Chile and northwest Argentina. It is a slow-growing shrub that grows in semi-arid areas of the Andean region. The Latin specific epithet of lappacea is derived from lappa meaning with burrs.

Kerriodoxa elegans, the white backed palm, is the only species of palm tree in the genus Kerriodoxa, in the family Arecaceae. It is an endemic species of Thailand, first discovered in the Khao Phra Thaew reserve on 11 March 1929 and described as a new genus and species in 1983. It is dioecious, with separate male and female plants. The genus name of Kerriodoxa is in honour of Arthur Francis George Kerr (1877–1942), an Irish medical doctor.

Fargesia murielae, the umbrella bamboo, is a species of flowering plant in the family Poaceae. It is a large, clump-forming evergreen bamboo, closely resembling Fargesia nitida in the same genus, but with yellow canes.

Paraserianthes lophantha (syn. Albizia lophantha), the Cape Leeuwin wattle, Bicol wattle, Cape wattle, Crested wattle, Brush wattle or plume albizia, is a fast-growing tree with creamy-yellow, bottlebrush like flowers. It is the sole species in genus Paraserianthes. It is a small tree (uppermost height approximately 5 metres or 16 feet) that occurs naturally along the southwest coast of Western Australia, from Fremantle to King George Sound. It is also native to Sumatra, Java, and the Lesser Sunda Islands. It was first spread beyond southwest Australia by Baron Ferdinand von Mueller, who gave

Coincya monensis is a plant species in the family Brassicaceae. Coincya monensis is native to western Europe and Morocco, but has been introduced in North America.

Paraserianthes lophantha (syn. Albizia lophantha), the Cape Leeuwin wattle, Bicol wattle, Cape wattle, Crested wattle, Brush wattle or plume albizia, is a fast-growing tree with creamy-yellow, bottlebrush like flowers. It is the sole species in genus Paraserianthes. It is a small tree (uppermost height approximately 5 metres or 16 feet) that occurs naturally along the southwest coast of Western Australia, from Fremantle to King George Sound. It is also native to Sumatra, Java, and the Lesser Sunda Islands. It was first spread beyond southwest Australia by Baron Ferdinand von Mueller, who gave

Zamia purpurea is a species of plant in the family Zamiaceae. It is endemic to Mexico, where it occurs only in the states of Oaxaca and Veracruz. It grows in the understory of rainforests. It is affected by habitat destruction.

Tetradenia riparia is a species of flowering plant native to southern Africa. It belongs in the mint and sage family Lamiaceae. Common names include ginger bush, incense bush, Ibozane, and musk bush. It is occasionally referred to as misty plume bush and is commonly used as a decorative garden plant due to its flowers when in full bloom. Tetradenia means 'four glands' and riparia translates to 'growing on banks of rivers'.

Syzygium oleosum, common names include blue lilly pilly, Scented satinash, and blue cherry. It is a species of Syzygium tree native to the eastern Australian rainforests and wet sclerophyll forests.

Syzygium australe, with many common names that include brush cherry, scrub cherry, creek lilly-pilly, creek satinash, and watergum, is a rainforest tree native to eastern Australia. It can attain a height of up to 35 m with a trunk diameter of 60 cm. In cultivation, this species is usually a small to medium-sized tree with a maximum height of only 18m.

Pulchranthus is a genus of flowering plants belonging to the family Acanthaceae. It includes four species native to northern South America, ranging from Colombia to Bolivia and northern Brazil.

Melocactus paucispinus is a species of cactus. It is endemic to Brazil, where it is known only from Bahia. Its populations are scattered in sand and gravel substrates.

Jordaaniella is a genus of plants in the family Aizoaceae. The plants of this genus are indigenous to Namibia and South Africa's Cape Provinces in southern Africa. Seven species are accepted: Jordaaniella anemoniflora (L.Bolus) van Jaarsv. Jordaaniella clavifolia (L.Bolus) H.E.K.Hartmann Jordaaniella cuprea (L.Bolus) H.E.K.Hartmann Jordaaniella dubia (Haw.) H.E.K.Hartmann Jordaaniella maritima (L.Bolus) van Jaarsv. Jordaaniella spongiosa (L.Bolus) H.E.K.Hartmann Jordaaniella uniflora (L.Bolus) H.E.K.Hartmann

Celtis toka is a medium-sized tree that commonly occurs adjacent to streams and rivers in the Sudanian-Sahel savannah climates of Tropical Africa but it can survive in drier habitats; it is also found of Yemen and Saudi Arabia.

Archidendropsis is a genus of flowering plants in the family Fabaceae. It includes 11 species, which are native to Australia, New Guinea, the Bismarck Archipelago, Solomon Islands, and New Caledonia.

Turbinicarpus gielsdorfianus is a species of flowering plant in the family Cactaceae. It is a succulent cactus subshrub endemic to northeastern Mexico. It was discovered near Ciudad del Maíz in San Luis Potosí state, in dry mattoral shrubland on a rocky calcareous slope. It is part of an edaphic plant community called matorral rosetófilo which grows on calcareous substrates. It was thought to be extinct for some time until it was rediscovered. It is a Critically endangered species, threatened by habitat loss. The species was first described as Echinocactus gielsdorfianus by Erich Werdermann

Tropidieae is an orchid tribe in the subfamily Epidendroideae.

Polygala sinisica is a species of plant in the family Polygalaceae. It is endemic to the island of Sardinia in Italy.

Phalaenopsis venosa, is a species of orchid endemic to Sulawesi, Indonesia. The specific epithet venosa, from the Latin venosus meaning veiny, refers to the floral colouration.

Geissorhiza radians or winecup flower, is a highly threatened species from the Iris family with fewer than 10 remaining sub-populations growing in south-western Cape Town, South Africa. The deep purple flowers with large, red centres grow in dense colonies, which makes for a spectacular flower display from mid-September, particularly around the town of Darling. Its seasonally wet lowlands habitat is, however, becoming increasingly threatened, with more than 80% of its original habitat now permanently transformed into agriculture or urban sprawl and the remaining populations threatened by

Cynoglottis barrelieri, Barrelier's bugloss or false alkanet, is a species of flowering plant in the Boraginaceae family. It is a perennial native to southeastern Europe (Italy, the Balkan Peninsula, and Hungary), Crimea, Turkey, Lebanon, and Syria. It is sometimes used as an ornamental plant.

Cynoglottis is a genus of flowering plants belonging to the family Boraginaceae. Its native range is southeastern Europe and Western Asia. Species: Cynoglottis barrelieri (All.) Vural & Kit Tan Cynoglottis chetikiana Vural & Kit Tan

Cycas guizhouensis is a species of cycad endemic to southwestern China.

Caluera is a genus of flowering plants in the orchid family, Orchidaceae. It contains three species, all native to South America: Caluera surinamensis Dodson & Determann - Suriname, Venezuela, Brazil Caluera tavaresii Campacci & J.B.F.Silva - Brazil Caluera vulpina Dodson & Determann - French Guiana, Ecuador

Bilacunaria is a genus of flowering plant in the family Apiaceae, with six species. It is native from the east Caucasus to West Asia.

Petrocodon is a genus of the family Gesneriaceae. It includes 51 species native to southern China and Indochina (Cambodia, Laos, Thailand, and Vietnam). Petrocodon formerly had few species, but recent genetic analysis has refined our understanding of the genus. Calcareoboea, Paralagarosolen, Dolicholoma, and Tengia monotypic genera have been transferred to Petrocodon, as well as some Didymocarpus and Lagarosolen species.