Plants named in 2015

Koenigia alpina (synonym Aconogonon alpinum), commonly known as alpine knotweed, is similar to Koenigia alaskana, but differs in leaf size and achene characteristics. It is native to Europe and temperate Asia. It is one of the parents of the cultivated hybrid Koenigia × fennica, the other being Koenigia weyrichii.

Drosera magnifica is a species of sundew endemic to Pico do Padre Ângelo (1,500–1,530 m asl) in eastern Minas Gerais in southeastern Brazil, where it grows among sandstone outcrops in herbaceous and shrubby vegetation. It is one of the three largest species of Drosera – the other two being D. regia from South Africa and D. gigantea from Australia – and was discovered in 2015 through images which appeared on the social network Facebook. It is the largest New World sundew, and it is closely related to Drosera graminifolia and Drosera spiralis. According to the IUCN Red List categories and

Koenigia weyrichii (synonym Persicaria weyrichii), the Chinese knotweed or Weyrich's knotweed, is a large, perennial, rhizomatous herb native to northeastern Asia in Kamchatka, Sakhalin, and northern and central Japan. It is also locally naturalised in northern Europe. It is one of the parents of the cultivated hybrid Koenigia × fennica, the other being Koenigia alpina.

Ziziphus budhensis is a species of plant in the family Rhamnaceae, endemic to the Temal region of Bagmati Province, Nepal.

Sirdavidia is a monotypic genus of flowering plants from the family Annonaceae described February 4, 2015, by Thomas L.P. Couvreur of France's Institute of Research for Development, Raoul Niangadouma of the Herbier National du Gabon, Bonaventure Sonké of the University of Yaoundé, and Hervé Sauquet of Université Paris-Sud. The genus was named in honor of Sir David Attenborough. The type species Sirdavidia solannona was discovered and collected in Gabon in Crystal Mountains National Park on November 15, 2013, at elevations of 300–600 meters. The species name refers to the resemblance of the

Codonorhiza is a genus of flowering plants belonging to the family Iridaceae. It is endemic to the southwestern Cape Provinces of South Africa. Species: Codonorhiza azurea (Eckl. ex Baker) Goldblatt & J.C.Manning Codonorhiza corymbosa (L.) Goldblatt & J.C.Manning Codonorhiza elandsmontana Goldblatt & J.C.Manning Codonorhiza falcata (L.f.) Goldblatt & J.C.Manning Codonorhiza fastigiata (Lam.) Goldblatt & J.C.Manning Codonorhiza micrantha (E.Mey. ex Klatt) Goldblatt & J.C.Manning Codonorhiza pillansii Goldblatt & J.C.Manning

Cleomella lutea is a species of flowering plant known by the common names yellow bee plant and yellow spiderflower. This annual wildflower is native to the western United States where it is most common in desert scrub and plateau habitats. It is a sprawling plant often exceeding 1 metre (3 feet) in height. The erect stem can be branched and has widely spaced leaves all the way along, each leaf made up of three to five leaflets, which are smaller closer to the top of the plant. Atop the stem is a showy inflorescence of many bright yellow flowers. Each flower has four narrow sepals and four

Koenigia × fennica, known as Finnish knotweed, is a hybrid between two species of Koenigia, K. alpina and K. weyrichii, members of the family Polygonaceae, the knotweed family. It generally only known as a cultivated garden plant, but plants have been recorded a few times surviving in abandoned areas in northern Europe, especially in Finland. The cultivar 'Johanniswolke' is considered an attractive ornamental perennial plant.

Ferula ammoniacum (syn. Dorema ammoniacum), also known as oshac or ussaq, is a species of flowering plant in the family Apiaceae, native to Iran, Turkmenistan, Afghanistan, and Pakistan. It is the source of Persian gum ammoniac.

Carex erythrovaginata, the lax bastard grass, is a species of flowering plant in the family Cyperaceae, native to New Zealand. A stout tussock-former reaching 75 cm (30 in), its dark green leaves are strongly scabrid.

Cyanicula aperta, commonly known as the western tiny blue china orchid, is a plant in the orchid family Orchidaceae and is endemic to Western Australia. It has a relatively narrow leaf and a single bluish-mauve flower. It is distinguished from the other two similar blue orchids by the sides of the labellum which are erect but well-separated from the column. This species also has a more easterly distribution than C. amplexans and C. sericea.

Salvia hasankeyfensis (Hasankeyf sage) is a recently identified species of wild sage native to the town of Hasankeyf in southeast Turkey and surrounding areas. The species was discovered during fieldwork in Hasankeyf in 2014 by Tuncay Dirmenci and Özal Güner, and described by them in a 2015 paper written with Ferhat Celep. It appears to be related to Salvia verbenaca, but the authors identify many distinguishing characteristics including S. hasankeyfensis's white petals (they are lilac to purple in S. verbenaca), and the shapes of the plants' leaves at the base and along the stem. They say it

Trigonidium egertonianum is an orchid found in Central and South America.

Electranthera is a genus of flowering plant in the family Asteraceae, native to Mexico to Honduras. The genus was first established in 1836, but under the illegitimate name Electra. A replacement name was published in 2015.

Cleomella oxystyloides is a species of flowering plants in the cleome family, Cleomaceae, which is known by the common name spiny caper. It is native to the Mojave Desert straddling the border between California and Nevada. It grows in rocky and sandy desert habitat, often on alkaline soils. This is an annual herb producing an erect, branching stem which may reach 1.5 meters in height. The leaf is made up of three thick, firm leaflets 2 to 6 centimeters long, borne on a stout, straight petiole. The inflorescence is a dense head of flowers clustered about the stem at the leaf axils, each

Carex nemoralis is a plant species in the Cyperaceae (sedge) family. It was first described in 1994 as Uncinia nemoralis by the Australian botanist Karen Wilson, and was transferred to the genus, Carex, in 2015 by the Global Carex Group. It is endemic to Australia where it is found in Victoria and New South Wales, in rainforested mountainous areas, and often along creeks.

Cyanicula nikulinskyae, commonly known as Philippa's china orchid, granite china orchid and Esperance china orchid is a plant in the orchid family Orchidaceae and is endemic to the south-west of Western Australia. It is very similar to Caladenia gemmata but has slightly smaller flowers with taller calli. It has a single broad, flattened leaf and up to two pale blue flowers and occurs near Esperance.

Cyanicula fragrans, commonly known as the fragrant china orchid, is a plant in the orchid family Orchidaceae and is endemic to Western Australia. It is similar to the other china orchids, especially C. ashbyae but has a paler green leaf, vanilla-scented flowers and a more northerly distribution.

Cyanicula ashbyae, commonly known as the powder-blue china orchid, is a plant in the orchid family Orchidaceae and is endemic to Western Australia. It has a relatively short, broad leaf and one or two pale bluish-mauve flowers.

Triodia stipoides is a species of grass native to the Kimberley region of Western Australia. It is a perennial which grows primarily in the seasonally dry tropics. It was named Monodia stipoides in 1985 by Surrey Wilfrid Laurance Jacobs, who classified it the sole species in genus Monodia. It was reclassified into genus Triodia in 2015.

Stelis roseopunctata is a species of flowering plant in the family Orchidaceae, native to Colombia, Ecuador and Venezuela. It was first described by John Lindley in 1846 as Pleurothallis roseopunctata and transferred to Stelis by Rodrigo Bernal in 2015. Stelis elegans (Kunth) Pridgeon & M.W.Chase is a synonym of Stelis roseopunctata; Stelis elegans Luer & R.Vásquez is a separate species.

Rumex hypogaeus (synonym Emex australis), commonly known in English as southern threecornerjack, devil's thorn, or double gee (also doublegee, from the old Afrikaner name dubbeltge-doorn - 'double thorned'), is a herbaceous plant of the Polygonaceae. It is native in South Africa and is an invasive species in Australia, Texas in the USA, and Pakistan.

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Phanera curtisii is a species of 'monkey ladder' lianas in the subfamily Cercidoideae and the tribe Bauhinieae, the genus having been separated from Bauhinia and the defunct genus Lasiobema. It is a climbing shrub native to Indochina (Cambodia, Laos, Thailand, and Vietnam) and Peninsular Malaysia.

Nepenthes kongkandana is a tropical pitcher plant endemic to Songkhla Province in southern Thailand. It is closely related to N. kerrii.

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Koenigia alaskana (synonym Aconogonon alaskanum, Persicaria alpina) is an Asian and North American species of flowering plant in the buckwheat family known by the common names Alaska wild-rhubarb and alpine knotweed.

Huberantha is a genus of plants in the family Annonaceae and tribe Miliuseae. It is distributed in Australia, tropical Asia, East Africa and some Pacific islands. Tanawat Chaowasku named the genus "Huber's flowers" in honor of the German botanist Herbert Huber and to highlight its flowers as a distinguishing feature of the genus. A number of species have been moved here from the genus Polyalthia.

Hemipilia cucullata is a species of flowering plant in the family Orchidaceae, native to temperate Eurasia from Poland to Japan, and also to the Himalayas. It is terrestrial, growing from tubers, to a height of up to 30 cm, with pinkish flowers arranged in a one-sided spike. It was placed in several different genera before being placed in its present genus.