Plants named in 1923

The greengages are a group of cultivars of the common Middle Eastern plum. Greengages are grown in temperate areas and are known for the rich, confectionery flavour. They are considered to be among the finest dessert plums though they are also consumed unripe when they are pleasantly tart, hard and crunchy.

The loganberry (Rubus × loganobaccus) is a hybrid of the North American blackberry (Rubus ursinus) and the European raspberry (Rubus idaeus), accidentally bred in 1881 by James Harvey Logan, for whom they are named. It is cultivated for its edible fruit.

Parodia is a genus of flowering plants in the family Cactaceae, native to the eastern slopes of the Andes in northwestern Argentina and southwestern Bolivia and in the lowland pampas regions of northeastern Argentina, southern Brazil, eastern Paraguay, and Uruguay. This genus has about 65 species, many of which have been transferred from Eriocactus, Notocactus and Wigginsia. They range from small globose plants to 1 m (3 ft) tall columnar cacti. All are deeply ribbed and spiny, with single flowers at or near the crown. Some species produce offsets at the base. They are popular in cultivation,

Pelecyphora, pincushion cactus or foxtail cactus is a genus of cacti, comprising 20 species. They originate from Mexico and the United States. Common species include the Missouri foxtail cactus P. missouriensis, widespread in grassland and forest west of the Mississippi, and the spinystar P. vivipara, distributed across the US and into Canada, first described by Nuttall in 1813.

Microbiota is a monotypic genus of evergreen coniferous shrubs in the cypress family Cupressaceae, containing only one species, Microbiota decussata (Siberian cypress, or Russian arborvitae). The plant is native and endemic to a limited area of the Sikhote-Alin mountains in Primorskiy Krai in the Russian Far East. The genus name Microbiota is not to be confused with the term "microbiota" for the range of micro-organisms of a life system. The genus name is derived from micro-, meaning "small", + Biota, a synonym of the genus Platycladus, a closely related conifer genus with the sole species

Rosularia is a small genus of the family Crassulaceae. It includes about 28-35 species from Europe, the Himalayas, and northern Africa.

Anadenanthera is a genus of South American trees in the Legume family, Fabaceae. The genus contains two species, A. colubrina and A. peregrina. These trees are known to the western world primarily as sources of the hallucinogenic snuffs vilca/cebil and yopo/cohoba. A 2024 molecular marker study of few hundred specimens sampled across Brazil and lowland Bolivia supports a four-species hypothesis (A. colubrina (Vell.) Brenan, A. macrocarpa (Benth.) Brenan, A. peregrina (L.) Speg., and A. falcata (Benth.) Speg) for the Anadenanthera genus as opposed to a two-species, four-variety hypothesis. The

Picea crassifolia, the Qinghai spruce, is a species of conifer in the family Pinaceae. It is found only in China.

Anadenanthera peregrina, also known as yopo, jopo, cohoba, cojoba, parica or calcium tree, is a perennial tree in the family Fabaceae native to the Caribbean and South America. It grows up to 20 m (70 ft) tall, and has a thorny bark. Its flowers grow in small, pale yellow to white spherical clusters resembling Acacia (e.g. wattle) inflorescences. This plant consists of two species A. colubrina and A. peregrina It is an entheogen which has been used in healing ceremonies and rituals for thousands of years in northern South America and the Caribbean. Although the seeds of the yopo tree were

Pseudorhipsalis is genus of cacti. This genus is often included in Disocactus. It is epiphytic, many branched, and elongated with flattened, serrated cladodes. In its early life, it stands erect, but soon becomes prostrate. It produces numerous flowers.

Perilla frutescens var. crispa, also known by its Japanese name shiso (紫蘇) from Chinese zisu, is a cultigen of Perilla frutescens, a herb in the mint family Lamiaceae. It is native to the mountainous regions of China and India, but is now found worldwide. The plant occurs in several forms, as defined by the characteristics of their leaves, including red, green, bicolor, and ruffled. Shiso is perennial and may be cultivated as an annual in temperate climates. Different parts of the plant are used in East Asian and Southeast Asian cuisine.

Eucalyptus microcarpa, commonly known as grey box, is a species of tree that is endemic to southeastern continental Australia. It has rough, fibrous or flaky bark on the trunk, smooth whitish bark above, lance-shaped adult leaves, flower buds in groups of between seven and eleven, white flowers and oval, cylindrical or urn-shaped fruit.

Launaea arborescens is a species of flowering plant in the family Asteraceae.

Cnidoscolus aconitifolius, commonly known as chaya, tree spinach, Mayan tree spinach, or spinach tree, is a large, fast-growing and leafy perennial shrub in the spurge family Euphorbiaceae. The plant is native to Mexico. As with most euphorbias, the plant exudes an irritating, often toxic latex when damaged. The plant is cultivated in warm climates for its leaves that are cooked and eaten like spinach.

Quiabentia is a genus of cacti, closely related to Pereskiopsis.

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Lankesterella is a genus of flowering plants from the orchid family, Orchidaceae. It is found mostly in South America, with a few species extending north into Cuba, the Dominican Republic and Costa Rica.

Kalanchoe tetraphylla is a species of Kalanchoe native to Madagascar. It is a small shrub with a simple stout stem and usually two pairs of opposite leaves, closely related to Kalanchoe synsepala. Its scientific name is often misapplied by horticulturists to the continental southern African species Kalanchoe luciae.

Abietinella abietina is a species of moss in the family Thuidiaceae. It is a small, distinctive pleurocarpous moss with erect stems and spreading branches, reminiscent of a tiny conifer. Its extremely rare variety, abietina, occurs along the commoner var. hystricosa on coastal sand dunes. Abietinella abietina is perennial in its growth, meaning it can be observed throughout the year.

Tsuga forrestii is a species of conifer in the family Pinaceae. It is considered as a variety of Tsuga chinensis (i.e., T. c. var. forrestii) by some. It grows in mixed forests in mountains and valleys of northeast Guizhou, southwest Sichuan, and northwest Yunnan, at altitudes of 2,000–3,000 m (6,600–9,800 ft). While not a target species, Tsuga forrestii is threatened by clear-cutting of mixed forests.

Gynura procumbens is a species of flowering plant in the family Asteraceae. It is sometimes referred to by the common names sabuñgai, sambung nyawa, longevity spinach, or longevity greens. It is an edible vine that is native to Bangladesh, Benin, Borneo, Cambodia, the Central African Republic, China, the Democratic Republic of Congo, Gabon, Guinea, Indonesia, Ivory Coast, Java, Liberia, Malaysia, New Guinea, Nigeria, the Philippines, Thailand, and Vietnam. Its leaves are ovate-elliptic or lanceolate, 3.5 to 8 centimetres (1+1⁄3 to 3+1⁄6 in) long, and 0.8 to 3.5 centimetres (1⁄3 to 1+1⁄3 in)

Eulaliopsis is a genus of Asian plants in the grass family.

Castanea ozarkensis, also known as the Ozark chinkapin (also spelled chinquapin), is a species of tree that is native to the United States. It is in the Castanea genus that includes chestnuts and types of chestnut known as chinkapins.

Callitris baileyi is a species of conifer in the family Cupressaceae. It is found only in Australia, more specifically Southeast Queensland. Its common name is Bailey's cypress-pine. The name is dedicated to Australian botanist Frederick Manson Bailey, who was the first to collect specimens of this tree. Bailey's name is closely associated with much of the flora of Queensland and their elucidation in southeastern Queensland. Over the past few decades the conifer has been severely threatened by habitat loss. Fruiting for the species has been recorded year-round.

Quercus thorelii is an Asian species of tree in the beech family Fagaceae. The species is named after the French botanist Clovis Thorel. It has been found in Indochina (Laos, Vietnam) and in southern China (Guangxi, Yunnan). It is placed in subgenus Cerris, section Cyclobalanopsis, the ring-cupped oaks. Quercus thorelii is a tree up to 30 m. tall. Twigs are covered with star-shaped hairs. Leaves can be as much as 170 mm long. The acorn is oblate, 10-15 × 25-30 mm, light brown, densely tomentose, apex depressed, with a scar that is approx. 20 mm in diameter.

Podocarpus henkelii (Henkel's yellowwood, Afrikaans: Henkel-se-Geelhout, Xhosa: Umsonti, Zulu: Umsonti) is a South African species of conifer in the family Podocarpaceae. It is grown ornamentally in gardens for its strikingly neat, attractive form and its elegant, drooping foliage.

Pachycormus is a monotypic genus of flowering plants in the cashew family commonly known as the Baja elephant tree, torote blanco, or copalquín. The single species Pachycormus discolor is endemic to the Baja California peninsula, with three varieties. This sarcocaulescent tree or shrub is characterized by its unique gnarled growth habit, skin-like exfoliating bark, and succulent nature, whose appearance has been colorfully described as "the proboscis of an elephant holding a nosegay," a "huge radish protruding from the ground," or "grotesque resemblances of the flexed limbs of a corpulent

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Pelecyphora sneedii (syn. Coryphantha sneedii) is a rare species of cactus known by the common names Sneed's pincushion cactus and carpet foxtail cactus. It is endemic to the Chihuahuan Desert of the southwestern United States and northwestern Mexico. It is a small, variable cactus with a lengthy taxonomic history, and is often subdivided into a number of subspecies or varieties. It is usually found on steep, rocky habitats, primarily of limestone geology, in desert scrub or coniferous forest. A species of conservation concern, P. sneedii faces threats from poaching, urban encroachment, and

Carex neurophora is a species of sedge known by the common name alpine nerve sedge. It is native to the western United States, where it grows in wet mountain habitat such as meadows and streambanks. This sedge produces stems up to about 60 centimeters tall and inflorescences which are dense, oblong clusters of indistinguishable spikes of flowers.