Begonia


Begonia In Focus

Adapted from Wikipedia, the free encyclopedia
Begonia
Begonia cultivars
Scientific classification Template:Taxonomy/Begonia
Kingdom: Plantae
clade: Angiosperms
clade: Eudicots
clade: Rosids
Order: Cucurbitales
Family: Begoniaceae
Genus: Begonia L.
Species
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Begonia is a genus in the flowering plant family Begoniaceae and is a perennial. The only other members of the family Begoniaceae are Hillebrandia, a genus with a single species in the Hawaiian Islands, and the genus Symbegonia which more recently was included in Begonia. “Begonia” is the common name as well as the generic name for all members of the genus. The genus name, coined by Charles Plumier, a French patron of botany, honours Michel Bégon, a former governor of the French colony of Haiti. It was adopted by Linnaeus. As a member of the order Curcurbitales, begonias are relatively closely related to such food crops as pumpkins/squash, gourds, cucumbers and melons.

Description

With around 1,500 species, Begonia is the sixth largest angiosperm genus.[1] 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 containing numerous stamens, the female having 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 (unequal-sided).

Nomenclature

The nomenclature of Begonias can be very complex and confusing. The term Picotee refers to to an edging on the petals that is in contrast to the colour of the main petal, if the colours blend. If they do not, then the term Marginata is used, but sometimes these terms are used simultaneously. [2] 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 classifies begonias into several major groups:

  • cane-like
  • shrub-like
  • tuberous
  • rhizomatous
  • semperflorens (or wax begonias)
  • rex
  • trailing-scandent
  • thick-stemmed.

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 fit well into none of them.

Binomial terms such as Begonia grandiflora, Begonia multiflora and Begonia pendula do not refer to accepted species, but rather varieties of tuberous begonias.[3]

Cultivation

A potted angel wing begonia (Begonia aconitifolia × B. coccinea).

The different groups of begonias have different cultural requirements but most species come from tropical regions and therefore 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 and dry place. Begonias of the semperflorens group (or wax begonias) are frequently grown as bedding plants outdoors. 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, many can be propagated from leaf cuttings or even sections of leaves, particularly the members of the rhizomatous and rex groups.

Popular Culture

The cultivar Kimjongilia is a floral emblem of North Korea.

The Grateful Dead wrote the popular song “Scarlet Begonias“.

Begonia Blossom Herbert is also a contemporary American artist from San Francisco.

In the 1993 American comedy Mrs Doubtfire, a goat eats a begonia belonging to Miranda Hillard (played by Sally Field) during her son’s birthday party.

Species and Cultivars

Species

Species include:

Floral Divider

Cultivars and Cultivar Groups

Gallery

References and External Links

  1. ^ David G. Frodin (2004). “History and concepts of big plant genera”. Taxon 53 (3): 753–776. DOI :10.2307/4135449 . JSTOR 4135449 .
  2. ^ University of Vermont: Plant and Soil Science Department
  3. ^ 1er Jardin
  4. ^ The Plant List

Gallery of Species Begonia

1 Comment

One thought on “Begonia

  1. hi just wanting to know if you or anyone in the society know of anyone who grows the iron cross bergonia i would love to buy a plant but cant find anyone who has it kind regards janet

    Liked by 1 person

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