Plants named in 1938

Syzygium malaccense is a species of flowering tree native to tropical Asia and Australia. It was cultivated from prehistoric times by the Austronesian peoples and introduced deliberately to remote Oceania as canoe plants. In modern times, it has been introduced throughout the tropics, including the Caribbean. The ripe fruit is edible but with little flavor.

Pinus wallichiana is a coniferous evergreen tree native to the Himalaya, Karakoram and Hindu Kush mountains, from eastern Afghanistan east across northern Pakistan and north west India to Yunnan in southwest China. It grows in mountain valleys at altitudes of 1800–4300 m (rarely as low as 1200 m), reaching 30–50 m (98–164 ft) in height. It favours a temperate climate with dry winters and wet summers. In Pashto, it is known as Nishtar. This tree is often known as Bhutan pine, (not to be confused with the recently described Bhutan white pine, Pinus bhutanica, a closely related species). Other

Syzygium samarangense is a species of flowering plant in the family Myrtaceae, native to an area that includes the Greater Sunda Islands, Malay Peninsula, and the Andaman and Nicobar Islands, but introduced in prehistoric times to a wider area and now widely cultivated in the tropics. Common names in English include wax apple, Java apple, Semarang rose-apple, and wax jambu.

Graptopetalum paraguayense is a species of succulent plant in the jade plant family, Crassulaceae, that is native to Tamaulipas, Mexico. Common names include mother-of-pearl-plant and ghost plant. This is not to be confused with Monotropa uniflora which is also referred to as the “Ghost plant”. G. paraguayense has white flowers which have a form of a star. The Graptopetalum paraguayense is called the ghost plant because of the residue on the leaves making it look like a ghost.

Sedum morganianum, the donkey tail or burro's tail, is a species of flowering plant in the family Crassulaceae, native to southern Mexico. It is a succulent perennial producing trailing stems up to 60 cm (24 in) long, with fleshy blue-green leaves and terminal pink to red flowers in summer. S. morganianum has been found wild in two ravines at Tenampa county, in central Veracruz, in eastern Mexico and on vertical cliffs of igneous rock in the Tropical Deciduous Forest zone. Due to its restricted geographic distribution, it should be regarded as a micro-endemic species.

Lannea coromandelica, also known as the Indian ash tree, is a species of tree in the family Anacardiaceae that grows in South and Southeast Asia, ranging from Sri Lanka to Southern China. Known also as the Mohin tree (Hindi: मोहिन) it is used in plywoods for its excellent termite resistance properties. It commonly grows in exposed dry woodland environments, where the tree is up to 10 meters tall and crooked. In more humid environments it is a larger spreading tree that can become 20 meters tall. In Sri Lanka Lannea coromandelica often grows on rock outcrops or inselbergs. In Nepal, commonly

Luzula luzuloides, the white wood-rush or oakforest wood-rush is a species of flowering plant in the family Juncaceae (rush family). It is native to Central Europe, from the Balkans to Fennoscandia, but it has also been introduced to the British Isles and other parts of Europe, and to the north-eastern United States and eastern Canada.

Austrocylindropuntia is a genus of cacti (family Cactaceae) with eight recognized species as of December 2025, which were once included in the genus Opuntia. All are native to South America, although some have been introduced elsewhere.

Salix chaenomeloides is a species of willow native to Japan, Korea, and China. The species was first described in 1938 by Arika Kimura. They are deciduous trees, reaching heights of 10–20 m. Trees are either male or female, and prefer moist or wet soils, generally growing in or near water. The Seongju Gyeongsan-ri Seongbaek Forest (성주 경산리 성밖숲) is a Korean Natural Monument which protects a stand of these trees, in Seongju.

Coleocephalocereus is a genus of erect and semi-erect columnar cacti from Brazil. These species develop a cephalium with wool and bristles. They are common to the inselbergs of the Brazilian Atlantic rainforest, and can comprise a dominant portion of the flora in these isolated, dome-shaped rocky outcrops.

Micranthocereus is genus of cactus. It originates from Brazil and includes about 10species. The two genera Austrocephalocereus and Siccobaccatus have been brought into synonymy with this genus.

Brasilicereus is a genus of cacti known only from east Brazil and comprising two species.

Bambusa ventricosa is a species of bamboo in the family Poaceae. It is native to Vietnam and to Guangdong province in southern China. The species is widely cultivated in subtropical regions around the world for the bulbous and ornamental stems. The species is used in bonsai. Common names include Buddha bamboo and Buddha Belly Bamboo.

Aloe arenicola (the sand aloe or Bont-Ot'korrie) is a spotted creeping aloe, indigenous to the arid west coast of South Africa.

Acanthocereus tetragonus is a species of cactus that is native to Florida and the Lower Rio Grande Valley of Texas in the United States, Mexico, Central America, the Caribbean, and northern South America. The species is invasive in New Caledonia. Common names include night-blooming cereus, barbed-wire cactus, sword-pear, dildo cactus, triangle cactus, and Órgano-alado de pitaya (Spanish). The miniature cultivar is known as fairy castle cactus. It was originally described by Carl Linnaeus in 1753 as Cactus tetragonus but was moved to the genus Acanthocereus in 1938 by Pieter Wagenaar

Neohenricia is a genus of flowering plants in the family Aizoaceae, native to the Cape Provinces and Free State of South Africa. Low-lying succulents, they are found in places that can collect a little water, such as crevices and pans, on sandstone or dolorite, in areas that get at least 200 mm of rainfall annually. The genus was named after Swiss-born South African plant physiologist Marguerite Gertrud Anna Henrici.

Horneophyton is an extinct early plant which may form a "missing link" between the hornworts and the Rhyniopsida. It is a member of the class Horneophytopsida. Horneophyton is among the most abundant fossil organisms found in the Rhynie chert, a Devonian Lagerstätte in Aberdeenshire, UK. A single species, Horneophyton lignieri, is known. Its probable female gametophyte is the form taxon Langiophyton mackiei.

Aronia × prunifolia, called the purple chokeberry, is a North American hybrid shrub of Aronia arbutifolia × Aronia melanocarpa in the rose family. It is native to eastern Canada and to the eastern and central United States, from Nova Scotia west to Ontario and Wisconsin, south as far as western South Carolina with an isolated population reported in southern Alabama. Some authors consider this to be a hybrid rather than a full-fledged species but it does grow in places where neither parent is present (most of Michigan for example). This independence merits acceptance as a full species. This

Acer nipponicum, occasionally called the Nippon maple, is a species of maple native to Japan. It belongs to the Acer section Parviflora.

Yucca carnerosana, commonly known as the giant Spanish dagger, is a species of North American plant in the asparagus family that grows in arid and desert climate areas. In the United States, it is confined to only a few counties in western Texas, where endemic populations are found in rocky outcrops. The species is, however, widely distributed in northern Mexico (Coahuila, Durango, Zacatecas, Nuevo León). It has a wide range and is abundant, and although it has local threats, its population appears to be stable overall. This yucca is cultivated in a few areas such as the western United

Haworthia herbacea is a species of succulent plant in the genus Haworthia native to the Cape Province of South Africa. Closely related to Haworthia reticulata, it has greenish yellow leaves with small spines. As it matures the leaves get darker green and the white spots raise. Flowers by way of a shoot and produces a large off-white flower.

Sorbaria tomentosa, the Himalayan sorbaria or Kashmir false spirea, is a species of flowering plant in the family Rosaceae. A shrub with white flowers that can grow up to 6 metres (20 ft) in height. It is native to Afghanistan, Central Asia and the Himalayas, and has been introduced to the South Island of New Zealand. It has gone extinct in Tajikistan. Its putative variety Sorbaria tomentosa var. angustifolia, the narrow-leaved Himalayan sorbaria, has gained the Royal Horticultural Society's Award of Garden Merit.

Porlieria chilensis is a species of flowering plant in the family Zygophyllaceae. It is endemic to Chile, where it is known as Guayacán and palo santo. It is a small tree or shrub, akin to other members of the genus which are all found in South America. It is distributed between the Coquimbo and O'Higgins Regions. An example occurrence of P. chilensis is in the arid forested area of central Chile, where it occurs in association with the endangered Chilean wine palm, Jubaea chilensis.

Eucalyptus michaeliana, commonly known as Hillgrove gum or brittle gum, is a species of small to medium-sized tree endemic to eastern Australia. It has smooth mottled greyish bark, lance-shaped to curved adult leaves, flower buds in compound umbels, white flowers and cup-shaped or barrel-shaped fruit.

Chamaedorea seifrizii, commonly known as bamboo palm, parlor palm, or reed palm, is a species of plant in the family Arecaceae. It is a subtropical palm that grows up to 20 feet tall, and is commonly used as a houseplant. The evergreen leaves are pinnately divided, and yellow flowers are borne on a panicle. The fruit are small, round, and black.

Callistopteris is a fern genus in the family Hymenophyllaceae. The genus is accepted in the Pteridophyte Phylogeny Group classification of 2016 (PPG I) but not by some other sources, which sink it into a broadly defined Trichomanes.

Allium howellii is a North American species of wild onion known by the common name Howell's onion. It is endemic to California.

Vatica diospyroides is a species of plant in the family Dipterocarpaceae. It is a tree found in Malaysia, Thailand, and Vietnam. It is a critically endangered species threatened by habitat loss.

Sciadocephala is a genus of Latin American plants in the tribe Eupatorieae within the family Asteraceae. Species Sciadocephala amazonica R.M.King & H.Rob. – Colombia, Ecuador Sciadocephala asplundii R.M.King & H.Rob. – Ecuador Sciadocephala dressleri R.M.King & H.Rob. – Panama, Ecuador Sciadocephala pakaraimae (Maguire & Wurdack) R.M.King & H.Rob. – Guyana Sciadocephala schultze-rhonhofiae Mattf. – Ecuador, Peru

Protea aristata is a compact shrub with beautiful flowers which is endemic to the southwestern part of the Cape Region of South Africa. P. aristata has become one of South Africa's most famous proteas in spite of its relatively late discovery, and re-discovery in 1953. The leaves are soft, dense and needle-like and the flower heads are a stunning crimson red, it may thus be a good potential ornamental plant for South African gardens. It is usually called the Ladismith sugarbush in South African English, although it has been called pine sugar bush in Australia. In the Afrikaans language it has