Plants named in 1855

Cananga odorata, commonly known as ylang-ylang, Macassar oil tree, perfume tree or cananga, is a species of plant in the custard apple family Annonaceae. It is native to areas from Indochina to northeastern Australia, and has been introduced to many other regions. It is valued for the essential oil, also called ylang-ylang, which is extracted from the flowers. Ylang-ylang is one of the most extensively used natural fragrances in the perfume industry.

Cedrus atlantica, the Atlas cedar, is a species of tree in the pine family Pinaceae, native to the Rif and Atlas Mountains of Morocco (Middle Atlas, High Atlas), and to the Tell Atlas in Algeria. A majority of the modern sources treat it as a distinct species Cedrus atlantica, but some sources consider it a subspecies of Lebanon cedar (C. libani subsp. atlantica).

Picea sitchensis, the Sitka spruce, is a large, coniferous, evergreen tree growing to just over 100 meters (330 ft) tall, with a trunk diameter at breast height that can exceed 5 m (16 ft). It is by far the largest species of spruce and the fifth-largest conifer in the world (behind giant sequoia, coast redwood, kauri, and western redcedar), and the third-tallest tree species (after coast redwood and South Tibetan cypress). The Sitka spruce is one of only three species documented to exceed 100 m (330 ft) in height. Its name is derived from the community of Sitka in southeast Alaska, where it

Tsuga (, from Japanese 栂 (ツガ), the name of Tsuga sieboldii) is a genus of conifers in the subfamily Abietoideae of Pinaceae, the pine family. The English-language common name "hemlock" arose from a perceived similarity in the smell of its crushed foliage to that of the unrelated plant hemlock. Unlike the latter, Tsuga species are not poisonous. The genus comprises eight to ten species (depending on the authority), with four species occurring in North America and four to six in eastern Asia.

Tsuga canadensis, also known as Canadian hemlock, eastern hemlock-spruce, or eastern hemlock, and in the French-speaking regions of Canada as pruche du Canada, is a coniferous tree native to eastern North America. It is the state tree of Pennsylvania. Eastern hemlocks are widespread throughout much of the Great Lakes region, the Appalachian Mountains, The Maritimes and the Northeastern United States. They have been introduced in the United Kingdom and mainland Europe, where they are used as ornamental trees. Eastern hemlock populations in North America are threatened in much of their range by

Tinospora cordifolia, guruchi, guduchi, amrita, or the heart-leaved moonseed, is a herbaceous vine of the family Menispermaceae native to South and Southeast Asia. It has been used in Ayurveda in an attempt to treat various disorders. There is no good evidence Tinospora cordifolia is of benefit as a medicine and its use can lead to potentially fatal herb-induced liver injury.

Abies cilicica, also known as Cilician fir or Taurus fir, is a species of conifer in the family Pinaceae. It is found mainly in Southern Turkey, and in a lesser measure in Lebanon and Syria. Abies cilicica and Cedrus libani, together with Acer hyrcanum subsp. tauricolum and Sorbus torminalis subsp. orientalis, are the predominant trees in the phytocoenosis Abeti-Cedrion, a type of forest of the middle and eastern Taurus Mountains of Turkey. These forests occur between 800 and 2,100 meters elevation. Over 5,000 years of logging, burning, and grazing have reduced these forests to enclaves. In

Picea jezoensis (sometimes misspelled Picea yezoensis), the dark-bark spruce, Ezo spruce, Yezo spruce, or Jezo spruce, is a large evergreen tree growing to 30–50 m tall and with a trunk diameter of up to 2 m. It is native to northeast Asia, from the mountains of central Japan and the Changbai Mountains on the China-North Korea border, north to eastern Siberia, including the Sikhote-Alin, Kuril Islands, Sakhalin and Kamchatka. It is found in cold but humid temperate rain forests, and nowhere does its range extend more than 400 km from the Pacific Ocean. The specific epithet jezoensis derives

Miscanthus, or silvergrass, is a genus of African, Eurasian, and Pacific Island plants in the grass family, Poaceae. The name is derived from the Greek words "miskos", meaning "stem", and "anthos", meaning "flower", in reference to the stalked spikelets on plants of this genus. Several species are known for their height and biomass production, and may be used as ornamental grasses.

Psilotaceae is a family of ferns (class Polypodiopsida) consisting of two genera, Psilotum and Tmesipteris with about a dozen species. It is the only family in the order Psilotales.

Taxodiaceae is a formerly recognized conifer family. It is today recognised as a paraphyletic grade of basal lineages within the Cupressaceae, with the exception of Sciadopitys verticillata, which has been reclassified into its own family, the Sciadopityaceae. The Taxodiaceae contains the following living genera: Athrotaxis Cryptomeria Cunninghamia Glyptostrobus Metasequoia Sequoia Sequoiadendron Taiwania Taxodium As proposed, genera of the former Taxodiaceae are grouped in the following subfamilies within the larger Cupressaceae: Athrotaxidoideae Quinn (Athrotaxis) Cunninghamioideae (Sieb. &

Pinus tropicalis, the tropical pine, is a pine tree endemic to the western highlands of the island of Cuba.

Miscanthus sinensis, also called eulalia grass, Chinese silver grass, or elephant grass, is a species of flowering plant in the grass family Poaceae, native to most of East Asia (China, Japan, Taiwan and Korea) and Southeast Asia (the Philippines, eastern Indonesia, Malaysia, Vietnam, Thailand, and Laos).

Picea polita (syn: Picea torano), the tigertail spruce or harimomi (Japanese:ハリモミ), is a species of coniferous tree in the family Pinaceae. It is native to Japan, occurring on the Pacific Ocean side of central Honshu, as well as Shikoku and Kyushu.

Cananga (ultimately from Proto-Malayo-Polynesian *kanaŋa) is a small genus of only two species in the custard apple family Annonaceae, native to areas from Indo-China through Malesia to Australia. One of the species, Cananga odorata, is the source of the fragrant oil ylang-ylang.

Rheum nobile, the Sikkim rhubarb or noble rhubarb (पदमचाल), is a giant herbaceous plant of the Buckwheat Family (Polygonaceae) and native to the Himalayas, from northeastern Afghanistan, east through northern Pakistan and India (in Sikkim), Nepal, Bhutan, and Tibet to Myanmar, occurring in the alpine zone at 4000–4800 m altitude. It is an extraordinary species of rhubarb (genus Rheum). At 1–2 m tall, the monocarpic inflorescences of R. nobile tower above the other shrubs and low herbs in its habitat, and it is visible across valleys from several kilometres. R. nobile is often called a

Euphorbia candelabrum is a succulent species of plant in the family Euphorbiaceae, one of several plants commonly known as candelabra tree. It is endemic to the Horn of Africa and eastern Africa along the East African Rift system. It is known in Ethiopia by its Amharic name, qwolqwal, or its Oromo name, adaamii. It is closely related to three other species of Euphorbia: Euphorbia ingens in the dry regions of southern Africa, Euphorbia conspicua from western Angola, and Euphorbia abyssinica, which is native to countries including Sudan, Eritrea, Djibouti, Ethiopia and Somalia. Its Latin name

Calliandra haematocephala, the red powder puff, is a species of flowering plants of the genus Calliandra in the family Fabaceae native to Bolivia. In its native habitat it typically grows to about 3–4.5 m (10–15 ft) tall and is widely cultivated as an ornamental flowering shrub in warm climates, where it can grow outdoors year-round.

Tsuga sieboldii, also called the southern Japanese hemlock, or in Japanese, simply tsuga (栂), is a conifer native to the Japanese islands of Honshū, Kyūshū, Shikoku and Yakushima. In Europe and North America the tree is sometimes used as an ornamental and has been in cultivation since 1861.

Eucalyptus leucoxylon, commonly known as yellow gum, blue gum or white ironbark, is a species of small to medium-sized tree that is endemic to south-eastern continental Australia. It has smooth yellowish bark with some rough bark near the base, lance-shaped or curved adult leaves, flower buds in groups of three and cylindrical, barrel-shaped or shortened spherical fruit. A widely cultivated species, it has white, red or pink flowers.

Radermachera is a genus of about 17 species of flowering plants in the family Bignoniaceae, native to southeastern Asia. They are evergreen trees reaching 5–40 m tall, with bipinnate to tripinnate leaves, and panicles of large bell-shaped, white, pink, pale purple or yellow flowers 5–7 cm diameter. The genus is named after Jacob Cornelis Matthieu Radermacher, the 18th century Dutch naturalist who cataloged much of the flora of Java and Sumatra.

Acacia aneura, commonly known as mulga, is a species of flowering plant in the family Fabaceae and is endemic to inland Australia. It is a variable shrub or small tree with flat, narrowly linear to elliptic phyllodes, cylindrical spikes of bright yellow flowers and more or less flat and straight, leathery pods.

The Torrey pine (Pinus torreyana) is a rare pine species in California, United States. It is a critically endangered species growing only in coastal San Diego County, and on Santa Rosa Island, offshore from Santa Barbara in Santa Barbara County, and in Monterey County. The Torrey pine is endemic to the California coastal sage and chaparral ecoregion.

Magnolia campbellii, or Campbell's magnolia, is a species of Magnolia that grows in sheltered valleys in the Himalaya from eastern Nepal, Sikkim and Assam, India, east to southwestern China (southern Xizang, Yunnan, southern Sichuan) and south to northern Myanmar.

Cryptotaenia japonica, commonly called mitsuba, Japanese wild parsley and Japanese honewort among other names, is a herbaceous perennial plant in the celery family native to Japan, Korea and China. The plant is edible and is commonly used as a garnish and root vegetable in Japan, and other Asian countries. It is sometimes considered a subspecies of Cryptotaenia canadensis as Cryptotaenia canadensis subsp. japonica.

Stelechocarpus burahol, commonly known as kepel, is a plant in the custard apple family Annonaceae, native to the humid evergreen forests of Malesia, and known for its edible fruit. It is cultivated only in Java, Indonesia.

Polycycnis, abbreviated in horticultural trade as Pcn, is a genus of orchid, comprising 17 species found in Central America, and northern South America.

Hesperocyparis macnabiana (MacNab cypress or Shasta cypress) is a species of western cypress in from California that was previously named Cupressus macnabiana.

Ammochloa is a genus of Mediterranean plants in the grass family, Poaceae. Species Ammochloa involucrata Murb. - Morocco Ammochloa palaestina Boiss. - Spain, Morocco, Algeria, Tunisia, Libya, Egypt, Palestine, Israel, Jordan, Lebanon, Syria, Turkey, Caucasus, Iraq, Iran, Kuwait Ammochloa pungens (Schreb.) Boiss. - Morocco, Algeria, Canary Islands

Aganope is a genus of flowering plants in the family Fabaceae. It belongs to the subfamily Faboideae. The genus contains 11 species, which range across sub-Saharan Africa, south and southeast Asia, and New Guinea.