Plants named in 2023

Sylvainia is a genus of flowering plants in the family Rubiaceae. It includes a single species, Sylvainia natalensis, a scrambling shrub or tree native to eastern and southeastern Africa, ranging from southern Tanzania through Malawi, Mozambique, Zambia, and Eswatini to Lesotho, KwaZulu-Natal, and the Northern Provinces of South Africa. The species was first described as Cephalanthus natalensis in 1881 by Daniel Oliver. In 2023 María Florencia Romero and Roberto M. Salas placed the species in the new monotypic genus Sylvainia.

Pinanga subterranea is a species of tree in the Arecaceae, or palm tree, family native to Borneo. It is widespread in the west of the island, where local communities use it for food.

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Cora is a large genus of basidiolichens in the family Hygrophoraceae. Modern molecular phylogenetics research has revealed a rich biodiversity in this largely tropical genus. The genus was originally thought to contain only a single species until DNA studies revealed its extraordinary diversity. High-throughput sequencing has also made it possible to recover fungal internal transcribed spacer (ITS) barcodes from older herbarium specimens of Cora and its close relatives (including material collected in 1888–1998), with sequences obtained from over three-quarters of the historical specimens

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Galanthus alpinus var. alpinus, also known as the Caucasian snowdrop, is a variety of flowering plant within the subfamily Amaryllidoideae.

Facheiroa markgrafii is a species of cactus which is endemic to Brazil.

Bragaia is a genus of cacti (family Cactaceae) with the sole species Bragaia estevesii. It is found in Brazil.

Cleistocactus aurantiacus is a species of Cleistocactus found in Bolivia.

Cereus gerardi is a species of Cereus native to the state Tocantins in Brazil.

Viridicereus is a monotypic genus of flowering plant in the cactus family Cactaceae. Its only species is Viridicereus violaciflorus, endemic to southeast Brazil, previously known as Micranthocereus violaciflorus and Arrojadoa violaciflora.

Zamia multidentata is a species of plant in the family Zamiaceae. It can be found in the Amazon Basin. Zamia multidentata is similar to Zamia hymenophyllidia and Zamia urep. It has 6.2 centimeter stems, 15 centimeter peduncles, and a flat megasporophylls.

Weizhia is a genus of flowering plants in the family Fabaceae. It includes a single species, Weizhia pentaphylla, a climbing perennial native to Zhejiang province in southeastern China. The genus and species were both described in 2023. Morphological and phylogenetic evidence place the genus in subtribe Glycininae, closely related to the genera Dumasia and Toxicopueraria. Weizhia is distinguished by having usually pinnately 5-foliolate leaves and spurred wing-petals.

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Truongsonia is a genus of palms. It includes a single species, Truongsonia lecongkietii, which is endemic to Vietnam. It is a small palm known only from a small area of Quảng Ngãi province in central Vietnam. It grows in forest understorey on steep slopes near streams in primary evergreen broadleaf forest at about 1000 meters elevation.

Troncosoa is a genus of flowering plants in the family Verbenaceae. The genus is monotypic, containing only the species Troncosoa seriphioides, which is found in Argentina.

Trichostema latens, commonly known as Hidden Bluecurls, is a species of flowering plant in the mint family (Lamiaceae). It is endemic to Florida in the southeastern United States.

Trichostema hobe, commonly known as Jobé Bluecurls or Hobe Mountain Bluecurls, is a species of flowering plant in the mint family (Lamiaceae). It is endemic to Florida in the southeastern United States.

Trichostema fruticosum, commonly known as Bushy Bluecurls, is a species of flowering plant native to the Southeastern United States. This species is relatively recently described, being split out from Trichostema dichotomum in 2023.

Trichostema floridanum, commonly known as Florida bluecurls, is a species of flowering plant in the mint family (Lamiaceae). It is native to the southeastern United States and the Bahamas, where it occurs primarily in coastal and subtropical habitats. The species was described in 2023 as part of a taxonomic revision that recognized previously unrecognized diversity within North American members of the genus Trichostema.

Tmesipteris alticola is a species of fern in the family Psilotaceae. Tmesipteris alticola was formally described by Leon R. Perrie and Patrick J. Brownsey in 2023.

Senega sanguinea, commonly known as purple milkwort, field milkwort, or blood milkwort is an annual species of plant in the milkwort family (Polygalaceae). It is native to central and eastern North America.

Senega polygama, the racemed milkwort, is a species of flowering plant in the family Polygalaceae, native to eastern Canada and the central and eastern United States.

Senega poaya is a herbaceous species of plant native to South America. It is a perennial plant, becoming somewhat woody at the base. It grows to a clump of stems 8–50 cm tall. The root is sometimes used for local medicinal use. It is also an active emetic.