''Calibrachoa'' is a
genus
Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com ...
of plants in the
Solanaceae
The Solanaceae , or nightshades, are a family of flowering plants that ranges from annual and perennial herbs to vines, lianas, epiphytes, shrubs, and trees, and includes a number of agricultural crops, medicinal plants, spices, weeds, and orn ...
(nightshade)
family
Family (from la, familia) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its ...
. They are
evergreen
In botany, an evergreen is a plant which has foliage that remains green and functional through more than one growing season. This also pertains to plants that retain their foliage only in warm climates, and contrasts with deciduous plants, which ...
short-lived
perennials
A perennial plant or simply perennial is a plant that lives more than two years. The term ('' per-'' + '' -ennial'', "through the years") is often used to differentiate a plant from shorter-lived annuals and biennials. The term is also widel ...
and subshrubs with a sprawling habit, with small
petunia
''Petunia'' is genus of 20 species of flowering plants of South American origin. The popular flower of the same name derived its epithet from the French, which took the word ''petun'', meaning "tobacco," from a Tupi–Guarani language. A tende ...
-type
flower
A flower, sometimes known as a bloom or blossom, is the reproductive structure found in flowering plants (plants of the division Angiospermae). The biological function of a flower is to facilitate reproduction, usually by providing a mechani ...
s. They are
found across much the same region of South America as petunias, from southern Brazil across to Peru and Chile, inhabiting scrub and open grassland.
Classification
''Calibrachoa'' are closely related to ''Petunia''. However, on further examination it has been found that there are major differences in
chromosome
A chromosome is a long DNA molecule with part or all of the genetic material of an organism. In most chromosomes the very long thin DNA fibers are coated with packaging proteins; in eukaryotic cells the most important of these proteins are ...
s, corresponding to external differences and fertilization factors that distinguished the two genera. ''Petchoa'' is a hybrid genus derived from crossing the genetically similar Calibrachoa and
Petunia
''Petunia'' is genus of 20 species of flowering plants of South American origin. The popular flower of the same name derived its epithet from the French, which took the word ''petun'', meaning "tobacco," from a Tupi–Guarani language. A tende ...
.
''Calibrachoa'' was named by
Vicente Cervantes Vicente (Vincente) de Cervantes (Ledrada, Salamanca España; 1755 - México; 1829) was a notable Spanish and Mexican physician and botanist.
Background
Don Vicente Cervantes was a contemporary of Martín Sessé y Lacasta and corresponded with J ...
after
Antonio de la Cal y Bracho, a 19th-century Mexican botanist and pharmacologist.
Description
''Calibrachoa'' are small shrubs or
herbaceous plant
Herbaceous plants are vascular plants that have no persistent woody stems above ground. This broad category of plants includes many perennials, and nearly all annuals and biennials.
Definitions of "herb" and "herbaceous"
The fourth edition of t ...
s with woody shoot axis that grow annual or perennial. The leaves are ovate, elliptic, reverse ovate or linear; its edge is flat or rolled back. The
inflorescence
An inflorescence is a group or cluster of flowers arranged on a stem that is composed of a main branch or a complicated arrangement of branches. Morphologically, it is the modified part of the shoot of seed plants where flowers are formed o ...
s are monochasic and have oppositely standing,
foliage
A leaf ( : leaves) is any of the principal appendages of a vascular plant stem, usually borne laterally aboveground and specialized for photosynthesis. Leaves are collectively called foliage, as in "autumn foliage", while the leaves, ste ...
-like bracts. The flowers are usually
zygomorphic
Floral symmetry describes whether, and how, a flower, in particular its perianth, can be divided into two or more identical or mirror-image parts.
Uncommonly, flowers may have no axis of symmetry at all, typically because their parts are spirall ...
, the
bud
In botany, a bud is an undeveloped or embryonic shoot and normally occurs in the axil of a leaf or at the tip of a stem. Once formed, a bud may remain for some time in a dormant condition, or it may form a shoot immediately. Buds may be spec ...
cover is reciprocal in most species, the only exception is Calibrachoa pygmaea in both cases. The
calyx has five or ten ribs, it is usually lobed to about the middle, the lobes are usually narrowed towards the top. The crown is funnel-shaped, only in Calibrachoa pygmaea it is salver-shaped, bulbous and tapered towards the tip. The color of the crown can be purple, red, pink or whitish.
The fruits are
capsules. The seeds have a net-like surface. This structure is due to walls perpendicular to the seed surface, which are straight in all species.
Species
28 species, including:
Cultivation
Some ''Calibrachoa'' are cultivated as
ornamental plant
Ornamental plants or garden plants are plants that are primarily grown for their beauty but also for qualities such as scent or how they shape physical space. Many flowering plants and garden varieties tend to be specially bred cultivars that i ...
s, popularly known as "Million Bells". The plants can tolerate light frost and thrive in sun or semi-shade. Plant in a free-draining soil and water only when the soil is almost dry. They can be propagated from tip
cuttings, but are frequently grown as
half-hardy annuals. They are suitable for container gardening and hanging baskets and will attract hummingbirds.
Cultivars
The following cultivars are recipients of the
Royal Horticultural Society
The Royal Horticultural Society (RHS), founded in 1804 as the Horticultural Society of London, is the UK's leading gardening charity.
The RHS promotes horticulture through its five gardens at Wisley (Surrey), Hyde Hall (Essex), Harlow Carr (Nort ...
's
Award of Garden Merit
The Award of Garden Merit (AGM) is a long-established annual award for plants by the British Royal Horticultural Society (RHS). It is based on assessment of the plants' performance under UK growing conditions.
History
The Award of Garden Merit ...
:-
*='Balcabrite'
*='Wescapido'
*='Sunbelrikubu'
*='Kleca16364'
* ='Kleca16356'
*='Kleca18085'
*='Kleca16006'
References
External links
GRIN Species List
{{Taxonbar, from=Q141632
Petunioideae
Solanaceae genera