Plants named in 1990

Rhododendron tomentosum (syn. Ledum palustre), commonly known as marsh Labrador tea, northern Labrador tea, marsh rosemary or wild rosemary, is a flowering plant in the subsection Ledum of the large genus Rhododendron in the family Ericaceae.

Rhododendron groenlandicum (formerly Ledum groenlandicum or Ledum latifolium), known by the common names bog Labrador tea, muskeg tea, swamp tea, in northern Canada, Hudson's Bay tea, and in Greenlandic, Qajaasaq (IPA: [qajaːsɑq], resembling a Kayak), is a species of flowering shrub in the family Ericaceae. Found in northern parts of North America and Greenland, R. groenlandicum grows primarily in bogs and other wetlands, which tend to be also in cold, acidic, and nutrient-poor environments. It has traditionally been used to make medicinal herbal teas among the Dene, Athabaskan, and Inuit,

Cyanthillium cinereum (also known as little ironweed and poovamkurunnal or poovamkurunnila in Malayalam, and monara kudumbiya in Sinhalese) is a species of perennial plants in the sunflower family. The species is native to tropical Africa and to tropical Asia (India, Sri Lanka, Indochina, Indonesia, etc.) and has become naturalized in Australia, Mesoamerica, tropical South America, the West Indies, and the US State of Florida. Cyanthillium cinereum is an annual herb up to 120 cm (4 feet) tall. It produces flat-topped arrays of numerous flower heads, each with pinkish or purplish disc florets

Xerochrysum (syn. Bracteantha) is a genus of flowering plants native to Australia. It was described by Russian botanist Nikolai Tzvelev in 1990, preceding (and taking precedence over) Bracteantha which was described the following year.

Swainsona formosa, commonly known as Sturt's desert pea or Sturt pea, is a species of flowering plant in the family Fabaceae and is native to the Northern Territory and all continental states of Australia, with the exception of Victoria. It is a prostrate annual or short lived perennial herb with imparipinnate leaves with about 15 elliptic to egg-shaped leaflets with the narrower end towards the base, and presents two to six racemes of usually red flowers.

The mongongo tree, mongongo nut or manketti tree (Schinziophyton rautanenii) is a member of the family Euphorbiaceae and the monotypic genus Schinziophyton. Native to Africa, the fruits produce an edible nut.

Pinus praetermissa, commonly known as McVaugh's pine, is a species of conifer in the family Pinaceae. Originally classified as a variety of Pinus oocarpa (P. oocarpa var. microphylla) in 1909, it was promoted to specific status in 1990 after further study. It is found only in western Mexico.

"Asteropeia" may also refer to a figure in Greek mythology, see Antinoe Asteropeia is a genus of flowering plants. The genus contains 8 known species of shrubs and small trees, all endemic to Madagascar. It is the sole genus in family Asteropeiaceae. Members of the family are evergreen trees or shrubs. Members of the family were separated from the Theaceae based on wood anatomy by the APG system of 1998, and assigned to the order Caryophyllales in the clade core eudicots. The family consists of a single genus, Asteropeia, native to Madagascar. According to the AP-Website it forms a clade

Acrorchis is a monotypic genus from the orchid family (Orchidaceae), subfamily Epidendroideae, tribe Epidendreae, subtribe Laeliinae. The only species, Acrorchis roseola, is an epiphytic orchid that occurs in Costa Rica and Panama at heights between 900 and 2,500 m. It is clump-forming, magenta orchid, reaching a height of 15 cm. The sepals and petals of its small flowers have distinct lengths and shapes. The base of the lip has a white color on the margins. This orchid is very rare in cultivation.

Devia is a genus of plants in the family Iridaceae first described in 1990. It contains only one known species, Devia xeromorpha, endemic to the southwestern part of Cape Province in South Africa. The genus was named in honour of the South African botanist and academic, Miriam Phoebe de Vos.

Annickia is a genus of plant in family Annonaceae. Every species of this genus is native to continental Africa, from west Tropical Africa to Tanzania.

Yua is a small genus of vines in the family Vitaceae, native to Nepal, S. China, Taiwan and Vietnam.

Vietnamosasa is a genus of Indochinese bamboo in the grass family. Species Vietnamosasa ciliata (A.Camus) T.Q.Nguyen – Cambodia, Laos, Vietnam Vietnamosasa darlacensis T.Q.Nguyen – Vietnam Vietnamosasa pusilla (A.Chev. & A.Camus) T.Q.Nguyen – Cambodia, Laos, Vietnam, Thailand

Eucalyptus olida, commonly known as strawberry gum or sometimes as forest berry, is a species of small to medium-sized tree that is endemic to a restricted area of New South Wales, Australia. It has rough, flaky and fibrous bark on the trunk and larger branches, lance-shaped to curved adult leaves, flower buds in groups of seven to fifteen or more, white flowers and barrel-shaped or bell-shaped fruit.

Rupertia is a small genus of flowering plants in the legume family, Fabaceae. It belongs to the subfamily Faboideae. There are three species native to western North America, especially California. Two of the species are quite rare. Three species: Rupertia hallii (Rydb.) J.W. Grimes Rupertia physodes (Douglas ex Hook.) J.W.Grimes Rupertia rigida (Parish) J.W.Grimes

Rhododendron columbianum, commonly known as western Labrador tea, swamp tea, or muskeg tea, is a shrub that is widespread in the western United States and in western Canada, reported from British Columbia, Alberta, Washington, Oregon, Idaho, California, Montana, Wyoming, Utah, Nevada, and Colorado. It grows in wet places from sea level up to 3,500 m (11,000 ft). It was formerly known as Ledum columbianum. Its origins date back to the late Pliocene.

Nervilieae is an orchid tribe in the subfamily Epidendroideae.

Encephalartos ituriensis (common name Ituri Forest cycad) is a palm-like cycad of the family Zamiaceae. It is native to the grassland on two large granite monadnocks of the Ituri forest area in the Democratic Republic of the Congo. Its IUCN conservation status is "Near Threatened."

Encephalartos aemulans, the Ngotshe cycad, is a species of cycad endemic to South Africa. It is listed by the IUCN as Critically Endangered and by CITES in Appendix I. Only 100-250 are believed to be left, with a decreasing population trend. Its main threat is collecting of wild specimens.

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Accara elegans is the sole species of the monotypic genus Accara in the botanical family Myrtaceae. It is a shrub endemic to the State of Minas Gerais in Brazil, reaching 1–2 m (3.3–6.6 ft) in height. Formerly included in the genera Myrtus and Psidium, Accara differs from the latter in embryo structure, and from the former in being pentamerous (having its parts in fives) and in bud structure. The generic name is an anagram of the type location, Caraça, and is similar to the presumably closely related genus of Acca, nowadays sometimes included in Feijoa.

Acacia brachypoda, known colloquially as western wheatbelt wattle is an endangered species of flowering plant in the family Fabaceae and is endemic to the south-west of Western Australia. It is a dense, rounded, sticky shrub with broad, flat branchlets, straight to slightly curved, terete to flat and linear phyllodes, spherical heads of golden-yellow flowers, and curved, wavy or coiled, thinly leathery to crust-like pods.

Tillandsia fuchsii is a species of flowering plant in the genus Tillandsia. This species is native to Mexico and Guatemala.

Serapias perez-chiscanoi is a species of orchid endemic to Portugal and western Spain.

Pradosia grisebachii is a species of plant in the family Sapotaceae. It is found in Trinidad and Tobago and Venezuela.

Pradosia glaziovii was a species of plant in the family Sapotaceae. It was endemic to eastern Brazil. According to the IUCN Red List, the species became extinct due to habitat loss. However the taxon synonym Pradosia verrucosa is assessed as critically endangered.

Paphiopedilum tigrinum is a species of flowering plant in the family Orchidaceae. It is native to eastern and western Yunnan province in China and to northeastern Myanmar. It is a terrestrial, epiphytic, or lithophytic perennial orchid which flowers from May to August. Its native habitat is moist montane forests from 1,200 to 2,500 meters elevation. It grows in moist well-drained and humus-rich soils, on mossy limestone cliffs, and on trees. It grows in moderate shade, often under trees or at thicket margins. It is a rare species with few restricted and localized populations. It is threatened

Nassella viridula is a species of grass known by the common name green needlegrass. It is native to North America, where it is widespread in western Canada and the western and central United States. It is introduced in parts of eastern North America. This grass forms tufts of stems up to about 1.2 meters tall. It grows from a fibrous root network which may penetrate over 1.5 meters deep in the soil. The leaves are mostly basal. Each is up to 30 centimeters long and tapers to a threadlike tip. The spikelets have awns reaching nearly 4 centimeters long, each bent twice. The plant reproduces via

Mexerion is a genus of flowering plants in the tribe Gnaphalieae within the family Asteraceae. As of May 2024, the number of species accepted varies from one to three.

Melicope elleryana, commonly known as pink flowered doughwood, pink evodia, corkwood, or saruwa, is a species of rainforest shrub or tree in the family Rutaceae, and is native to New Guinea, parts of eastern Indonesia, the Solomon Islands and northern Australia. It has trifoliate leaves and pink to white, bisexual flowers arranged in panicles in leaf axils.