Begonia | |
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Begonia obliqua | |
Scientific classification | |
Kingdom: | Plantae |
Clade: | Tracheophytes |
Clade: | Angiosperms |
Clade: | Eudicots |
Clade: | Rosids |
Order: | Cucurbitales |
Family: | Begoniaceae |
Genus: | Begonia L. |
Type species | |
Begonia obliqua L. | |
Species | |
Range of the genus Begonia | |
Synonyms | |
List
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Begonia is a genus of perennial flowering plants in the family Begoniaceae. The genus contains more than 2,000 different plant species. The Begonias are native to moist subtropical and tropical climates. Some species are commonly grown indoors as ornamental houseplants in cooler climates. In cooler climates some species are cultivated outside in summertime for their bright colorful flowers, which have sepals but no petals.
With 2,002 species, Begonia is one of the largest genera of flowering plants. [1] [2] The species are terrestrial (sometimes epiphytic) herbs or undershrubs, and occur in subtropical and tropical moist climates, in South and Central America, Africa, and southern Asia. Terrestrial species in the wild are commonly upright-stemmed, rhizomatous, or tuberous. The plants are monoecious, with unisexual male and female flowers occurring separately on the same plant; the male contains numerous stamens, and the female has a large inferior ovary and two to four branched or twisted stigmas. In most species, the fruit is a winged capsule containing numerous minute seeds, although baccate fruits are also known. The leaves, which are often large and variously marked or variegated, are usually asymmetric such that their left side and right side are different sizes.
The genus name Begonia was coined by Charles Plumier, a French patron of botany, and adopted by Linnaeus in 1753, to honor Michel Bégon, a former governor of the French colony of Saint-Domingue (now Haiti).
The following phylogenetic tree shows the relationships among sections of the genus Begonia. [3]
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Selected species: [4]
The different groups of begonias have different cultural requirements, but most species come from tropical regions, so they and their hybrids require warm temperatures. Most are forest understory plants and require bright shade; few will tolerate full sun, especially in warmer climates. In general, begonias require a well-drained growing medium that is neither constantly wet nor allowed to dry out completely. Many begonias will grow and flower year-round except for tuberous begonias, which usually have a dormant period. During this dormant period, the tubers can be stored in a cool, dry place. Begonias of the semperflorens group (or wax begonias) are frequently grown as bedding plants outdoors. Wax begonias are very attractive, they adapt well when brought inside the house for overwintering and can live up to 4-5 years. [5]
A recent group of hybrids derived from this group is marketed as "Dragonwing" begonias; they are much larger both in leaf and in flower. Tuberous begonias are frequently used as container plants. Although most Begonia species are tropical or subtropical in origin, the Chinese species B. grandis is hardy to USDA hardiness zone 6 and is commonly known as the "hardy begonia". Most begonias can be grown outdoors year-round in subtropical or tropical climates, but in temperate climates, begonias are grown outdoors as annuals, or as house or greenhouse plants.
Most begonias are easily propagated by division or from stem cuttings. In addition, some can be propagated from leaf cuttings or even sections of leaves, particularly the members of the rhizomatous and rex groups.
The nomenclature of begonias can be very complex and confusing. The term 'picotee' refers to edging on the petals that is in contrast to the color of the main petal if the colors blend. If they do not, then the term 'marginata' is used, but sometimes these terms are used simultaneously. [6] 'Non-Stop' refers to a camellia tuberous hybrid that under certain conditions will bloom 'non-stop' all year round.
Because of their sometimes showy flowers of white, pink, scarlet, or yellow color and often attractively marked leaves, many species and innumerable hybrids and cultivars are cultivated. The genus is unusual in that species throughout the genus, even those coming from different continents, can frequently be hybridized with each other, and this has led to an enormous number of cultivars. The American Begonia Society is the International Cultivar Registration Authority for Begonia, and classifies them into several major groups:
For the most part, these groups do not correspond to any formal taxonomic groupings or phylogeny, and many species and hybrids have characteristics of more than one group or do not fit well in any of them.
The following is a selection from about 70 species, varieties and cultivars which currently hold the Royal Horticultural Society's Award of Garden Merit: [7]
The cultivar 'Kimjongilia' is a floral emblem of North Korea.
Most begonias are sour to the taste, and some people in some areas eat them. This is safe in small amounts but potentially toxic in large quantities due to the prevalence of oxalic acid in the tissues. [22]
Canna or canna lily is the only genus of flowering plants in the family Cannaceae, consisting of 10 species. All of the genus's species are native to the American tropics and were naturalized in Europe, India and Africa in the 1860s. Although they grow native to the tropics, most cultivars have been developed in temperate climates and are easy to grow in most countries of the world, as long as they receive at least 6–8 hours average sunlight during the summer, and are moved to a warm location for the winter. See the Canna cultivar gallery for photographs of Canna cultivars.
Deutzia is a genus of about 60 species of flowering plants in the family Hydrangeaceae, native to eastern and central Asia, and Central America and also Europe. By far the highest species diversity is in China, where 50 species occur.
A daylily, day lily or ditch-lily is a flowering plant in the genus Hemerocallis, a member of the family Asphodelaceae, subfamily Hemerocallidoideae, native to Asia. Despite the common name, it is not taxonomically classified in the lily genus. Gardening enthusiasts and horticulturists have long bred Hemerocallis species for their attractive flowers; a select few species of the genus have edible petals, while some are extremely toxic. Thousands of cultivars have been registered by the American Daylily Society, the only internationally recognized registrant according to the International Code of Nomenclature for Cultivated Plants. The plants are perennial, bulbous plants, whose common name alludes to its flowers, which typically last about a day.
Fuchsia is a genus of flowering plants that consists mostly of shrubs or small trees.
Ceanothus is a genus of about 50–60 species of nitrogen-fixing shrubs and small trees in the buckthorn family (Rhamnaceae). Common names for members of this genus are buckbrush, California lilac, soap bush, or just ceanothus. "Ceanothus" comes from Ancient Greek: κεάνωθος (keanōthos), which was applied by Theophrastus to an Old World plant believed to be Cirsium arvense.
Bergenia is a genus of ten species of flowering plants in the family Saxifragaceae, native to central Asia, from Afghanistan to China and the Himalayan region.
Alocasia is a genus of rhizomatous or tuberous, broad-leaved, perennial, flowering plants from the family Araceae. There are about 90 accepted species native to tropical and subtropical Asia and eastern Australia. Around the world, many growers widely cultivate a range of hybrids and cultivars as ornamentals.
Drosera peltata, commonly called the shield sundew or pale sundew, is a climbing or scrambling perennial tuberous species in the carnivorous plant genus Drosera. Among the tuberous sundews, D. peltata has the largest distribution, which includes eastern and western Australia, New Zealand, India, and most of Southeast Asia including the Philippines. The specific epithet is Latin for "shield shaped", a reference to the shape of the cauline leaves. It is either a single extremely variable species, or a complex of several closely related species of uncertain taxonomic boundaries. In Australia at least four forms have had or still have specific taxonomic recognition: Drosera peltata subsp. peltata, D. peltata subsp. auriculata, D. foliosa and D. gracilis.
Astilbe is a genus of 18 species of rhizomatous flowering plants within the family Saxifragaceae, native to mountain ravines and woodlands in Asia and North America. Some species are known by the common names false goat's beard and false spirea.
Fuchsia magellanica – commonly known as the hummingbird fuchsia, hardy fuchsia or chilco – is a species of flowering plant in the evening primrose family Onagraceae, native to the lower Southern Cone of southern South America.
Campanula glomerata, known by the common names clustered bellflower or Dane's blood, is a species of flowering plant in the genus Campanula, belonging to the family Campanulaceae. It is the county flower of Rutland, England.
Begonia grandis, the hardy begonia, is a species of flowering plant in the family Begoniaceae. This herbaceous perennial has alternate, simple leaves on arching stems. The flowers are pink or white, borne in dichotomously branching cymes from late summer through fall in USDA U.S. Hardiness Zone 7. As the common name "hardy begonia" implies, it is winter hardy in some temperate regions.
Begonia sutherlandii, known as the Sutherland begonia and as iwozya in Kimalila, Tanzania, is a tuberous flowering perennial plant in the family Begoniaceae, growing to 0.5 metres (20 in) with fleshy pink stems from 10 to 80 centimetres long. Leaves are commonly dark green and veined with red and covered with short hairs on the underside. They are asymmetrical in shape and the margin is toothed. Flowers, produced in pendent panicles throughout summer, are 20–26 millimetres (0.8–1.0 in) in diameter, and are usually orange or orange–red with yellow anthers.
Dactylorhiza foliosa, the Madeira orchid or leafy orchid, is a species of flowering plant in the family Orchidaceae, endemic to the Portuguese Island of Madeira in the eastern Atlantic Ocean. It is a tuberous herbaceous perennial growing to 60 cm (24 in) and producing spikes of intense, magenta-pink flowers in late spring.
Begonia foliosa is a species of flowering plant in the family Begoniaceae, native to Colombia and Venezuela. It is a shrublike begonia growing to 1 metre (3.3 ft), bearing succulent, pendent stems 45 centimetres (18 in) long, thickly clothed with glossy oval green leaves, and producing panicles of small white flowers. The variety commonly cultivated is B. foliosa var. miniata with pink or red flowers. As it does not tolerate temperatures below 0 °C (32 °F), in temperate regions it requires winter protection.
Lithops karasmontana, is a species of flowering plant in the ice plant family Aizoaceae, native to Namibia and South Africa.
Begonia dregei, the maple leaf begonia or grape-leaf begonia, is a species of flowering plant in the genus Begonia native to the Eastern Cape and KwaZulu-Natal provinces of South Africa. It has gained the Royal Horticultural Society's Award of Garden Merit.
Begonia rex, the king begonia, is a species of flowering plant in the family Begoniaceae. It is found from Arunachal Pradesh to southeast China, and has been introduced to Bangladesh, Cuba, and Hispaniola. It is a parent to over 500 cultivars in the Begonia Rex Cultorum Group of houseplants. Other parents in the multitude of crosses made during the creation of the Group include Begonia annulata, B. cathayana, B. decora, B. diadema, B. dregei, B. grandis, B. hatacoa, B. palmata, and B. xanthina.
Begonia acetosa is a species of flowering plant in the family Begoniaceae, native to southeastern Brazil. It is used to create new begonia hybrids due to its attractive foliage. Begonia acetosa has been cultivated in the United States since 1946, when Mulford B. Foster introduced the species from forested mountains near Rio de Janeiro. It was first described in 1831 by José Mariano de Conceição Vellozo. The specific epithet acetosa means 'acid' or 'sour', referring to the rhubarb-like taste of its leaves.