''Jovibarba'' ("beard of

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") is a small

genus Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...

of three

species A species () is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. It is the basic unit of Taxonomy (biology), ...

succulent In botany, succulent plants, also known as succulents, are plants with parts that are thickened, fleshy, and engorged, usually to retain water in arid climates or soil conditions. The word ''succulent'' comes from the Latin word ''sucus'', meani ...

flowering plant Flowering plants are plants that bear flowers and fruits, and form the clade Angiospermae (). The term angiosperm is derived from the Ancient Greek, Greek words (; 'container, vessel') and (; 'seed'), meaning that the seeds are enclosed with ...

s in the

family Family (from ) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). It forms the basis for social order. Ideally, families offer predictabili ...

Crassulaceae The Crassulaceae (, from Latin ''crassus'', thick), also known as the crassulas, the stonecrops or the orpine family, are a diverse Family (biology), family of dicotyledon angiosperms primarily characterized by succulent leaves and a form of phot ...

endemic Endemism is the state of a species being found only in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also foun ...

to mountainous regions in the southeastern quadrant of Europe. The genus is sometimes classified as a

subgenus In biology, a subgenus ( subgenera) is a taxonomic rank directly below genus. In the International Code of Zoological Nomenclature, a subgeneric name can be used independently or included in a species name, in parentheses, placed between the ge ...

of ''

Sempervivum ''Sempervivum'' () is a genus of about 40 species of flowering plants in the family (biology), family Crassulaceae, commonly known as houseleeks. Other common names include liveforever (the source of the taxonomical designation ''Sempervivum'', l ...

'', to which it is closely related. ''Jovibarba'' have pale-greenish-yellow or yellow

actinomorphic 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 ...

flowers with about six petals, while ''Sempervivum'' have generally pinkish flowers with around twice as many petals, which open more widely than jovibarba flowers. The common name

hen and chicks Hen and chicks (also known as hen-and-chickens, or hen-widdies in the southern United States) is a common name for a group of small succulent plants. They belong to the flowering plant family Crassulaceae, native to southern Europe and northe ...

is applied to some ''Jovibarba'' species (and also species in several other

genera Genus (; : genera ) is a taxonomic rank above species and below family as used in the biological classification of living and fossil organisms as well as viruses. In binomial nomenclature, the genus name forms the first part of the binomial s ...

). Most jovibarbas, like sempervivums, reproduce via

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s in addition to producing seeds via sexual reproduction. '' Jovibarba heuffelii'' does not produce offsets on stolons. Instead the offspring of this plant are produced within the mother plant. To propagate it must be split with a knife. The other two jovibarba species are commonly called rollers. They produce offsets that are lightly attached and easily pop off and roll away from the mother plant. Offsets survive the main

rosette Rosette is the French diminutive of ''rose''. It may refer to: Flower shaped designs * Rosette (award), a mark awarded by an organisation * Rosette (design), a small flower design *hence, various flower-shaped or rotational symmetric forms: ** R ...

, which is

monocarpic Monocarpic plants are those that flower and set seeds only once, and then die. The term is derived from Greek (', "single" + , "fruit" or "grain"), and was first used by Alphonse de Candolle. Other terms with the same meaning are '' hapaxanth'' ...

Species

Only three species are accepted as distinct by the ''Flora Europaea'': *'' Jovibarba globifera'' (syn. ''J. sobolifera''; ''Sempervivum globiferum'') *'' Jovibarba heuffelii'' (syn. ''J. velenovskyi''; ''Sempervivum heuffelii'') *'' Jovibarba hirta'' (syn. ''Sempervivum hirtum'') ''Jovibarba globifera'' and its subspecies (subsp. ''hirtum'', subsp. ''allionii'', subsp. ''arenaria'') live in the eastern and southern Alps, the Carpathians and the western Balkans south to northern Albania. ''J. heuffelii'' occurs in the remainder of the Balkans and the eastern Carpathians, southeast of ''J. globifera''. ''J. hirta'' occurs further west, in the southwestern Alps.

References

External links

''Flora Europaea'' search resultsUSDA Jovibarba Page
Crassulaceae Flora of Europe Crassulaceae genera {{Crassulaceae-stub