Plants named in 1911

Sideroxylon spinosum, known as argan (Tashelhit: ⴰⵔⴳⴰⵏ, romanized: argan), synonym Argania spinosa, is a species of flowering plant. It is a tree native to the calcareous semi-desert Sous valley and to the Chiadma and Haha regions of Morocco, as well as some parts of Tindouf Province in southwestern Algeria, and also to Mauritania and Western Sahara. Argan trees grow to 8–10 m (26–33 ft) high and live up to approximately 200 years. They are thorny, with gnarled trunks and wide spreading crown. The crown has a circumference of up to 70 m (230 ft) and the branches may lean towards the ground.

Pinus taiwanensis, the Taiwan red pine, is a species of conifer in the family Pinaceae endemic to Taiwan.

Marchantiopsida is a class of liverworts within the phylum Marchantiophyta. The species in this class are known as complex thalloid liverworts. The species in this class are widely distributed and can be found worldwide. Complex oil bodies are only found in the gametophyte.

Graptopetalum (leatherpetal) is a genus of flowering plants in the family Crassulaceae. They are perennial succulent plants and native to Mexico and Arizona. They grow usually in a rosette. There are around 19 species in this genus.

Mitrastemon is a genus of two widely disjunct species of parasitic plants. It is the only genus within the family Mitrastemonaceae. Mitrastemon species are root endoparasites, which grow on Fagaceae. It is also a non-photosynthetic plant that parasitizes other plants such as Castanopsis sieboldii.

Betula platyphylla, the Asian white birch or Japanese white birch, is a tree species in the family Betulaceae. It can be found in subarctic and temperate Asia in Japan, China, Korea, Mongolia, the Russian Far East, and Siberia. It can grow to be 30 metres (100 feet) tall.

Nepenthes truncata (; from Latin truncatus "terminating abruptly") is a tropical pitcher plant endemic to the Philippines. It is known from the islands of Dinagat, Leyte, and Mindanao. The species grows at an elevation of 0–1,500 m above sea level. Nepenthes truncata is characterised by its heart-shaped (truncate) leaves and very large pitchers, which can reach up to 40 cm in height. Nepenthes robcantleyi was once considered a dark, highland form of this species.

Citrus cavaleriei, the Ichang papeda (Chinese: 宜昌橙), is a slow-growing species of papeda that has characteristic lemon-scented foliage and flowers. It is native to southwestern and west-central China and is likely named for the city of Yichang (宜昌), in China's Hubei province. The Ichang papeda is notable for its unusual hardiness. With the exception of Poncirus trifoliata, it is the hardiest citrus plant, tolerating both moderate frost and damp conditions.

Acer shirasawanum, the Shirasawa maple or fullmoon maple (Japanese: オオイタヤメイゲツ, romanized: ooitayameigetsu), is a species of maple native to Japan, on central and southern Honshū (Fukushima Prefecture southwards), Shikoku, and Kyūshū.

Quercus arkansana, the Arkansas oak, is a species of oak tree. It is native to the southeastern United States (eastern Texas, southern Arkansas, Louisiana, Mississippi, Alabama, Georgia, and the Florida Panhandle). It is threatened by use of its habitat for pine plantations, clearing of land, and diebacks that may be caused by drought.

Fagus hayatae, also known as Taiwan beech, is a species of beech tree. It can grow 20 metres (66 ft) tall. It is the only beech species native to Taiwan. While the International Union for Conservation of Nature reports it as endemic to Taiwan, Flora of China and Flora of Taiwan also report it from China; Flora of China reports a wide but discontinuous mainland distribution between Sichuan in the southwest to Zhejiang in the east.

Hoya kerrii is a species of plant in the family Apocynaceae, native to Southeast Asia. Its eponymous collector is Arthur Francis George Kerr, Irish physician and botanist. As the thick leaves are heart-shaped, the plant is sometimes named "lucky-heart". In Europe, it is sold for Saint Valentine's Day. Its origin area is South China, Vietnam, Laos, Cambodia, Thailand and the Indonesian island of Java.

Siphonochilus is a genus of flowering plants native to sub-Saharan Africa.

Litsea glutinosa is a rainforest tree in the laurel family, Lauraceae. Common names include soft bollygum, bolly beech, Bollywood, bollygum, brown bollygum, brown Bollywood, sycamore and brown beech. The powdered bark, known as jigat, may be used as an adhesive paste in incense stick production.

Iris chrysographes, the black iris, is a plant species that belongs to the genus Iris. It is native to Southern China and Myanmar (Burma), growing in meadows, streamsides, hillsides and forest margins. Other irises with black flowers include Iris nigricans (the national flower of Jordan), Iris petrana, Iris atrofusca, Iris atropurpurea, Iris susiana, and some varieties of Iris germanica.

Callicarpa bodinieri, or Bodinier's beautyberry, is a species of flowering plant in the genus Callicarpa of the family Lamiaceae, native to West and Central China. Growing to 3 m (10 ft) tall by 2.5 m (8 ft) wide, it is an upright deciduous shrub with dark green leaves turning red in autumn (fall). In midsummer, small lilac flowers are produced in the leaf axils. But it is grown in gardens primarily for its small, decorative purple berries in tight clusters in autumn. The Latin specific epithet bodinieri refers to Émile-Marie Bodinier, a French missionary and botanist of the 19th century, who

Pleione formosana, the Taiwan pleione or windowsill orchid, is a species of flowering plant in the family Orchidaceae, native to southeastern China as well as northern and central Taiwan. It is a deciduous perennial, terrestrial orchid growing to 15 cm (6 in) tall by 30 cm (12 in) wide, with spherical pseudobulbs that produce a single folded leaf. The pink flowers, borne in spring, have fringed white lips that are strongly marked and mottled with brown on the inner surface. The specific epithet formosana refers to Taiwan's former name, Formosa. This plant has gained the Royal Horticultural

Nepenthes merrilliana (; after Elmer Drew Merrill) is a tropical pitcher plant endemic to the Philippines. It produces some of the largest pitchers in the genus, rivalling those of N. rajah. The species is native to northern and central Mindanao as well as neighbouring Dinagat and Samar. Its presence in southern Mindanao is uncertain. It inhabits coastal forest areas on steep slopes at elevations of 0–1,100 m above sea level. Nepenthes surigaoensis is closely related to N. merrilliana and was for a long time considered a heterotypic synonym of this species. Nepenthes samar is another closely

Isoberlinia is a genus in the family Fabaceae of five species of tree native to the hotter parts of tropical Africa. They are an important component of miombo woodlands. The leaves have three or four pairs of large leaflets and stout seed pods. Some former species in this genus were transferred to the genus Julbernardia.

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Aytoniaceae is a family of liverworts in the order Marchantiales.

Aloe pearsonii (Pearson's Aloe) is a very distinctive and unusual species of aloe, that is naturally endemic to the arid Richtersveld area on the border between South Africa and Namibia.

Salix rorida is a species of willow native to Japan, northern China, Korea, and the Russian Far East. It is a deciduous tree, reaching a height of 10 m.

Megastylis is a genus of flowering plants from the orchid family, Orchidaceae. It contains 6 known species, all native to Vanuatu and New Caledonia. Megastylis gigas (Rchb.f.) Schltr. Megastylis latilabris (Schltr.) Schltr. Megastylis latissima (Schltr.) Schltr. Megastylis montana (Schltr.) Schltr. Megastylis paradoxa (Kraenzl.) N.Hallé Megastylis rara (Schltr.) Schltr.

Dracontioides is a genus of flowering plants in the family Araceae. It was long thought to contain only a single species until a second species was described in 2005. Both are endemic to Brazil. The type species of the genus is Dracontioides desciscens, native to swamps in eastern Brazil. This species was originally classified by Heinrich Wilhelm Schott as belonging to Urospatha, but it was subsequently reassigned to its own genus Dracontioides by Adolf Engler. The genus is closely related to both Urospatha and Dracontium. The most notable feature of the species its glossy extremely sagittate

Calliergonella cuspidata is a species of moss belonging to the family Pylaisiaceae. It is widely distributed around the world. In a study of the effect of the herbicide Asulam on moss growth, Calliergonella cuspidata was shown to have intermediate sensitivity to Asulam exposure.

Yucca thompsoniana, the Thompson's yucca, is a plant in the family Asparagaceae, native to Texas, Chihuahua and Coahuila. Other names for the plant include Beaked yucca, Soyate and Palmita. Yucca thompsoniana has a trunk up to 1 m tall, branching above the ground. It flowers before there is any trunk at all, but continues to flower after the stem begins to grow. Leaves are narrow and dagger-like, a bit glaucous, up to 35 cm long and 10 mm wide. Inflorescence is a panicle about 100 cm high. Flowers are white, about 4 cm long and appear in late March through early May. Fruit is a dry,

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Sedum pachyphyllum is a species of flowering plant in the stonecrop family, Crassulaceae.

Quercus kerrii is an uncommon Asian species of tree in the family Fagaceae. It is native to Thailand and Vietnam. There are also populations in southern China that according to some authors belong to Q. kerrii but considered by others to belong to a different species, Q. helferiana. Quercus kerrii is placed in subgenus Cerris, section Cyclobalanopsis. Its Chinese name is mao ye qing gang.