Plants named in 1929

Ajwain or ajowan (Trachyspermum ammi) —also known as ajowan caraway, thymol seeds, bishop's weed, or carom—is an annual herb in the family Apiaceae. Both the leaves and the seed‑like fruit (often mistakenly called seeds) of the plant are consumed by humans. The name "bishop's weed" also is a common name for other plants. The "seed" (i.e., the fruit) is often confused with lovage seed.

Syzygium aqueum is a species of brush cherry tree. Its common names include watery rose apple, water apple and bell fruit, and jambu in Malay and several Indian languages. The tree is cultivated for its wood and edible fruit. The fruit is a fleshy, whitish-pinkish to yellowish-pinkish or red berry which is bell-shaped, waxy and crisp. Syzygium aqueum is native to tropical Asia and Queensland. The tree requires heavy rainfalls and can survive in tropical habitats, up to 1600m above sea level. In the Philippines, it is locally known as tambis and is often confused with macopa (Syzygium

The genus Aztekium contains two species of small globular cactus. Discovered in 1929 by F. Ritter, in Rayones, Nuevo León, Mexico, this genus was thought to be monotypic (with Aztekium ritteri) until a second species (Aztekium hintonii) was discovered by George S. Hinton, in Galeana, Nuevo León in 1991. A further possible species, Aztekium valdezii, was described in 2011, but is considered to be a synonym of A. ritteri.

Chaenomeles speciosa, the flowering quince, Chinese quince or Japanese quince, is a thorny deciduous or semi-evergreen shrub native to eastern Asia. It is taller than another commonly cultivated species, C. japonica, usually growing to about 2 m (6 ft 7 in). The flowers are usually red, but may be pink, white or green. The fruit is a fragrant, hard pome that resembles a quince.

Chenopodium pallidicaule, known as cañihua, canihua or cañahua (from Quechua 'qañiwa, qañawa or qañawi') and also kañiwa or kaniwa, is a species of goosefoot, similar in character and uses to the closely related quinoa (Chenopodium quinoa). Cañihua is native to the Andean region, with more than 200 varieties, and it has been farmed in the Altiplano for millennia. As a crop, cañihua has distinct characteristics, including tolerance of high mountain conditions, high content of protein and dietary fiber, and rich phenolic content.

Aloe helenae is a species of plant in the genus Aloe. It is endemic to Madagascar, and is an endangered species.

Peltigerales is an order of lichen-forming fungi belonging to the class Lecanoromycetes in the division Ascomycota. The taxonomy of the group has seen numerous changes; it was formerly often treated as a suborder of the order Lecanorales. It contains two suborders, eight families and about 45 genera such as Lobaria and Peltigera. The fungi form lichens in a symbiotic relationship with one or two photosynthetic partners which may be a cyanobacterium such as Nostoc or a green alga such as Coccomyxa. The majority of species contain just a cyanobacterium, a smaller number have both a

Stenocactus is a genus of cacti in the Cactaceae family.

Arthrocereus is a genus of cactus, native to southeast and west-central Brazil.

Liriope muscari is a species of flowering plant from East Asia. Common names in English include big blue lilyturf, lilyturf, border grass, and monkey grass. This small herbaceous perennial has grass-like evergreen foliage and lilac-purple flowers which produce single-seeded berries on a spike in the fall. In some parts of the United States, it is an invasive species.

Citrus indica is a species of hybrid Citrus known by the common name Indian wild orange. It is native to South Asia.

Aztekium ritteri is a species of cactus native to the Mexican state of Nuevo León.

Nicotiana benthamiana, colloquially known as benth or benthi, is a species of Nicotiana indigenous to Australia. It is a close relative of tobacco. A synonym for this species is Nicotiana suaveolens var. cordifolia, a description given by George Bentham in Flora Australiensis in 1868. This was transferred to Nicotiana benthamiana by Karel Domin in Bibliotheca Botanica (1929), honoring the original author in the specific epithet.

Buchtienia is a genus of flowering plants from the orchid family, Orchidaceae. It contains 3 species, all native to South America: Buchtienia boliviensis Schltr. Buchtienia ecuadorensis Garay Buchtienia rosea Garay

Monilaria is a genus of plants in the family Aizoaceae. It is endemic to the Cape Provinces of South Africa.

Mammillaria albicoma is a species of plant in the family Cactaceae. It is endemic to Mexico. Its natural habitat is hot deserts. It is threatened by habitat loss.

Erythronium sibiricum is a bulbous perennial plant in the lily family Liliaceae, commonly known as the Siberian fawn lily or Siberian trout lily.

Allium ochotense, or the Siberian onion, is a primarily East Asian species of wild onion native to northern Japan, Korea, China, and the Russian Far East, as well as Attu Island in Alaska. Some authors have considered A. ochotense as belonging to the same species as A. victorialis, but more recent authorities have treated it as a distinct species.

Airampoa is a South American genus of the cactus family (Cactaceae).

Aeonium nobile is a succulent, subtropical flowering plant in the family Crassulaceae. It is native to the island of La Palma in the Canary Islands, where it grows on dry slopes and cliffs at altitudes up to 800m. The inflorescences are large and spreading with bright red flowers.

Salix schwerinii, the narrow-leaf willow, is a species of willow native to northeastern Asia (from Kolyma to northeastern China). It is a shrub or a tree 10 to 15 m (33 to 49 ft) m high with long and exceptionally narrow leaves, similar and closely related to Salix viminalis.

Quercus inopina, the sandhill oak, is an uncommon North American species of oak shrub. It has been found only in the state of Florida in the southeastern United States. It is a branching shrub up to 5 meters (17 feet) in height. The bark is gray, twigs purplish brown. The leaves are broad, up to 85 millimeters (3+3⁄8 inches) long, usually hairless, with no teeth or lobes.

Alcantarea is a genus of flowering plants in the Bromeliaceae family. It is named for Dom Pedro d'Alcântara, second Emperor of Brazil. It is related to the genus Vriesea in the subfamily Tillandsioideae.

Mammillaria hahniana, the old lady cactus, is a species of flowering plant in the family Cactaceae, native to central Mexico. It grows to 25 cm (10 in) tall by 50 cm (20 in) broad. The solitary spherical stems, 12 cm in diameter, are covered in white down and white spines. Reddish purple flowers are borne in spring and summer, sometimes forming a complete ring around the apex of the plant. Its status is listed as "Near Threatened" by the IUCN Red List.

Ibicella lutea (; syn. Martynia lutea, Proboscidea lutea) is a species of flowering plant known by the common name yellow unicorn-plant. It grows in dry conditions, such as those in desert regions. It is native to South America, but has become established as a non-native species in various semi-arid regions around the world, including Southern Africa and the Central Valley of California. The plant is aromatic, with an unpleasant scent. It produces short, glandular hairs over most of its aerial surfaces and is coated in sticky resin. Insects often become stuck in the slimy exudate and die, but

Haworthia pygmaea is a species of the genus Haworthia in the family Asphodelaceae, endemic to the Mossel Bay area of the Western Cape, South Africa.

Euphorbia denisiana is a species of plant in the family Euphorbiaceae. It is endemic to Madagascar. It is threatened by habitat loss.

Allium bidentatum is an Asian species of plant in the amaryllis family. It is native to Mongolia, Russia (Buryatiya, Zabaykalsky Krai, Krasnoyarsk, Primorye), Kazakhstan, and northern China (Hebei, Heilongjiang, Jilin, Liaoning, Inner Mongolia, Shanxi, Xinjiang ). It grows in well-lit places, sometimes in saline soil. Allium bidentatum produces very narrow cylindrical bulbs rarely more than 4 mm across. Scape is round in cross-section, up to 30 cm tall. Leaves are more or less round in cross-section, up to 15 cm long. Umbel is hemispherical, with red or red-violet flowers. Two varieties are

Schlechteranthus is a genus of flowering plants belonging to the family Aizoaceae. It is native to the Cape Provinces within the South African Republic. The genus name of Schlechteranthus is in honour of Max Schlechter (1874–1960), brother and colleague of Rudolf Schlechter (a German taxonomist, botanist, and author of several works on orchids). While, Max was a German collector of natural history specimens. It was first described and published in Monatsschr. Deutsch. Kakteen-Ges. Vol.1 on page 16 in 1929.

Ibicella is a genus of plants in the Martyniaceae family. Species include: Ibicella lutea (Lindl.) Van Eselt. Ibicella nelsoniana (Barb. Rodr.) Van Eselt. Ibicella parodii Abbiatti