Plants named in 1931

Syzygium jambos is a species of rose apple originating in Southeast Asia and occurring widely elsewhere, having been introduced as an ornamental and fruit tree.

The Boletales are an order of Agaricomycetes containing over 1300 species with a diverse array of fruiting body types. The boletes are the best known members of this group, and until recently, the Boletales were thought to only contain boletes. The Boletales are now known to contain distinct groups of agarics, puffballs, and other fruiting-body types.

Banisteriopsis caapi, also known as, caapi, soul vine, yagé (yage), or ayahuasca (the latter of which also refers to the psychedelic decoction made with the vine and a plant source of dimethyltryptamine) is a South American liana of the family Malpighiaceae. It is commonly used as an ingredient of ayahuasca, a decoction with a long history of its entheogenic use and holds status as a "plant teacher" among the Indigenous peoples of the Amazon rainforest. It was used by Indigenous peoples of South America for centuries, but it was first documented by Europeans in the 16th century and formally

Lysichiton americanus, also called western skunk cabbage (US), yellow skunk cabbage (UK), American skunk-cabbage (Britain and Ireland) or swamp lantern, is a plant found in swamps and wet woods, along streams and in other wet areas of the Pacific Northwest, where it is one of the few native species in the arum family. The plant is called skunk cabbage because of the distinctive "skunky" odor that it emits when it blooms. This odor will permeate the area where the plant grows, and can be detected even in old, dried specimens. The distinctive odor attracts its pollinators, scavenging flies and

Pinus fenzeliana commonly known as the Hainan white pine or Fenzel's pine, is a tree endemic to the island of Hainan off southern China. This pine reaches heights of 20 m with a trunk 1 m in diameter.

Cyphostemma is a flowering plant genus in the family Vitaceae, with around 250 species distributed throughout the tropics and subtropics. These species are caudiciform and used to belong to the genus Cissus. The genus name comes from Greek kyphos, meaning hump, and stemma, meaning garland. Within the Vitaceae, Cyphostemma is most closely related to Cayratia and Tetrastigma. All species of Cyphostemma were once included in the genus Cissus but are now considered to be distinct.

Mammillaria surculosa is a species of flowering plant in the cactus family Cactaceae, native to north eastern Mexico, where it occurs in extremely isolated patches at altitudes of 950–1,200 m (3,120–3,940 ft). It is registered as "Endangered" by the IUCN Red List. Growing to 10 cm (3.9 in) tall by 50 cm (20 in) wide, this tiny plant forms colonies of spiny stems with relatively large, lemon yellow flowers in spring. The Latin specific epithet surculosa means "producing suckers". In cultivation this plant needs to be grown in a sharply-drained medium with a low nutrient content, at a minimum

Cochlospermum religiosum is a flowering plant from the tropical region of Southeast Asia and the Indian subcontinent. It is a small tree growing to a height of 7.5 m (25 ft) usually found in dry deciduous forests. The name religiosum derives from the fact that the flowers are used as temple offerings. It is also known as silk-cotton tree because the capsules containing the seeds have a fluffy cotton-like substance similar to kapok. Another common name is buttercup tree because its yellow and bright flowers look like large-sized buttercups. In Theravada Buddhism, this plant is said to have

Syzygium caryophyllatum is a species of plant in the family Myrtaceae. It is a tree native to Sri Lanka and southern India. It grows in areas from sea level to elevations of 1,160 m (3,810 ft). In India it is found in the states of Kerala, Karnataka, Goa and Tamil Nadu. The fruit is edible. The local name in Karnataka is Kuntala/Kuntu Nerale.

Pyrrosia lingua is a species of epiphytic fern in the family Polypodiaceae. It occurs through China and Southeast Asia and into Japan and Taiwan. Pyrrosia lingua is grown as a cultivated plant, and multiple named cultivars have been developed.

Endogonales is an order of fungi within the phylum of Zygomycota, and in class Endogonomycetes. It contains 2 families; Endogonaceae, with 6 genera and 38 species and Densosporaceae, with one genera and 4 species.

Aphanamixis polystachya, the pithraj tree, is a species of tree in the family Meliaceae. It is native to India, Pakistan, Nepal, Bhutan, Bangladesh, Myanmar and Sri Lanka. It is a widely used as a medicinal plant in Ayurveda.

Ailanthus triphysa (also Ailanthus malabarica), ferntop ash, is a medium to tall evergreen rainforest tree that is native to Asia and Australia. The wood is used for matchwood and plywood. The tree is known as halmaddi in India, where its resin, also called halmaddi, may be used in incense. Inappropriate extraction methods were resulting in trees dying, thus by the 1990s the Indian forestry department had banned extraction.

Acer pentaphyllum (五小叶槭 wu xiao ye qi) is a very rare, endangered maple species endemic to southwestern Sichuan in China, at elevations of 2300–2900 meters. Acer pentaphyllum is a deciduous tree that grows to 10 meters in height. Leaves are palmately compound hairless, usually with 5 lobes but sometimes with 4 or 7. Leaflet are 5-8 × 1.5–2 cm, narrowly lanceolate or lanceolate.

Salvia eigii is a herbaceous perennial native to Israel. The plant grows in a clump 30 cm high by 60 cm wide, with dark green leaves, the largest of which grow up to 30 cm long and 20 cm wide. The flower stalk grows up to 1 m high, with several 20–30 cm inflorescences which hold flowers growing in whorls. The flower's upper lip is purple, the lower lip is pink, with ruby lines going into the throat. The calyx is a prominent ruby color. Salvia eigii is named after the botanist Alexander Eig.

Salix koriyanagi is a species of willow native to the Korean Peninsula, and introduced to Japan. It can reach a height of 4 m (13 ft). Salix koriyanagi is used primarily in Japan for making baskets and furniture.

Mammillaria herrerae is a species of plant in the family Cactaceae. It is endemic to Mexico where it is confined to Querétaro. It thrives in a semi-desert shrubland habitat. Common name is golf ball cactus. It is threatened by habitat loss and illegal collection. In a 20-year period over 95% of the species population was illegally collected or sold. Mammillaria herrerae has an IUCN rating of critically endangered. Due to its specific growing conditions, there is a challenge in propagating. Many studies are being done to determine best growing conditions, through related species.

Graptopetalum amethystinum, also called jewel-leaf plant, is a plant belonging to the succulent genus Graptopetalum. It is native to Mexico.

Echinopsis backebergii, synonym Lobivia backebergii, is a species of flowering plant in the cactus family Cactaceae, native to Bolivia and Peru.

Copernicia baileyana is a species of flowering plant in the palm family Arecaceae. It is sometimes referred to by the common name yarey and it is endemic to eastern and central Cuba. Like other members of this genus, C. baileyana is a fan palm. Trees are 10 to 20 metres tall with stems 40 (to 60) centimetres in diameter and are sometimes swollen. The fruit is black, 1.8 to 2.3 centimetres long and 1.8 to 2 cm in diameter. The leaves are used for weaving hats, baskets and other items. They are also used for thatch.

Canthium coromandelicum, also known as Karai, is a bushy thorny suffruticose herb, a native of India found mainly in the Coromandel region.

Allium tel-avivense is a plant species found in Israel, Palestine, Jordan and Egypt, including the Sinai Peninsula. It is a bulb-forming perennial with a small umbel of only a few flowers. Tepals are pink, and the ovary is large, green and conspicuous. Its name comes from the city of Tel Aviv.

Acacia phlebophylla, also known by the names Buffalo sallow wattle and Mount Buffalo wattle, is a shrub to small tree of the family Fabaceae. It grows up to a maximum of 6 metres (20 ft) tall and has wide, rounded asymmetrical phyllodes. It is a critically endangered species only known from the high elevation granite slopes of Mount Buffalo National Park in Victoria, Australia.

Stenopadus is a genus of South American plants in the family Asteraceae. It includes 15 species native to tropical South America, including Colombia, Ecuador, Peru, Venezuela, Guyana, and northern Brazil.

Quercus argyrotricha is a rare Chinese species of trees in the beech family. It has been found only in Guizhou Province in southern China. The common name is Chinese for this species is gui zhou qing gang. It is placed in subgenus Cerris, section Cyclobalanopsis. Quercus argyrotricha is a tree with yellow twigs and leaves as much as 12 cm long. The tree can grow up to 10 meters or more. The leaves are leathery, 3 to 6 centimeters wide, and either oval or oval-elliptic in shape. The base is oblique and rounded. The leaves are also lustrous and glabrous above. But they are silvery stellate

Oreomecon lapponica is a species in the poppy family known by the common name Lapland poppy. It grows in the Arctic tundra from Norway around the arctic circle to Greenland. Until 2023 it was known as Papaver lapponicum.

Iris × hollandica, commonly known as the Dutch iris, is a hybrid iris developed from species native to Portugal, Spain and North Africa (Iris tingitana × Iris xiphium). Two varieties of Iris xiphium (var. praecox) from Spain and (var. lusitanica) from Portugal, were crossed with Iris tingitana (from North Africa). This was carried out by a Dutch bulb firm 'Van Tubergen' (based in Haarlem) in the 19th century. Because the bulb could be forced in a greenhouse to flower early, it was popular with florists. Since the 1900s it has been crossed with other species to create various cultivars. After

Hosta ventricosa, the blue plantain lily, is a species of flowering plant in the family Asparagaceae, native to southeast and south-central China, and introduced to the eastern United States. It reproduces by pseudogamous apomixis.

Heliamphora tatei (after George Henry Hamilton Tate) is a species of marsh pitcher plant endemic to Cerro Duida, Cerro Huachamacari and Cerro Marahuaca in Venezuela. It is closely related to H. macdonaldae, H. neblinae, and H. parva, and all three have in the past been considered forms or varieties of H. tatei. Like H. tatei, these species are noted for their stem-forming growth habit. Putative natural hybrids between H. macdonaldae and H. tatei have been recorded in the southern part of Cerro Duida.

Duidaea is a genus of Venezuelan flowering plants in the family Asteraceae. The Duidaea is derived from the Cerro Duida (or Mount Duida) in Venezuela. Species Duidaea marahuacensis Steyerm. - Venezuela Duidaea pinifolia S.F.Blake - Venezuela Duidaea rubriceps S.F.Blake - Venezuela Duidaea tatei S.F.Blake - Venezuela