parent_taxon rolandra
A shrub or bush is a small to medium - sized woody ___MASK31___ . It is distinguished from a tree by its multiple stems and shorter height , usually under 6 m ( 20 ft ) tall . Plants of many species may grow either into shrubs or trees , depending on their growing conditions . Small , low shrubs , generally less than 2 m ( 6 . 6 ft ) tall , such as lavender , periwinkle and most small garden varieties of roses , are often termed subshrubs . In biology , an organism is any contiguous living system , such as an ___MASK34___ , plant , fungus , archaeon , or bacterium . All known types of organisms are capable of some degree of response to stimuli , reproduction , growth and development and homeostasis . An organism consists of one or more cells ; when it has one cell it is known as a unicellular organism ; and when it has more than one it is known as a multicellular organism . Most unicellular organisms are of microscopic scale and are thus loosely described as microorganisms . Humans are multicellular organisms composed of many trillions of cells grouped into specialized tissues and organs . Rolandra is a genus of flowering plants in the ___MASK90___ within the daisy family . Species The only known species is Rolandra fruticosa , native to Central and South America plus the West Indies . It is also reportedly naturalized in Japan and Java . formerly included see Ichthyothere Trichospira Rolandra reptans Willd . ex Less . - Trichospira verticillata ( L . ) S . F . Blake Rolandra septans Willd . ex Less . - Trichospira verticillata ( L . ) S . F . Blake Rolandra terminalis Spreng . - Ichthyothere terminalis ( Spreng . ) S . F . Blake A genus ( genera ) is a taxonomic rank used in the biological classification of living and fossil organisms in biology . In the hierarchy of biological classification , genus comes above species and below family . In binomial nomenclature , the genus name forms the first part of the binomial species name for each species within the genus . The tropics are a region of the Earth surrounding the equator . They are delimited in latitude by the Tropic of ___MASK47___ in the Northern Hemisphere at N and the Tropic of Capricorn in the Southern Hemisphere at S ; these latitudes correspond to the axial tilt of the Earth . The tropics are also referred to as the tropical zone and the torrid zone ( see geographical zone ). The tropics include all the areas on the Earth where the Sun is at a point directly overhead at least once during the solar year ( which is a subsolar point ). ___MASK90___ is a tribe of about 1300 species of plants in the ___MASK65___ family . They are mostly found in the tropics and warmer temperate areas , both in the Americas and the Old World . They are mostly herbaceous plants or shrubs , although there is at least one tree species , " Vernonia arborea ". Binomial nomenclature ( also called binominal nomenclature or binary nomenclature ) is a formal system of naming species of living things by giving each a name composed of two parts , both of which use Latin grammatical forms , although they can be based on words from other languages . Such a name is called a binomial name ( which may be shortened to just " binomial "), a binomen or a scientific name ; more informally it is also called a Latin name . The first part of the name identifies the genus to which the species belongs ; the second part identifies the species within the genus . For example , humans belong to the genus " ___MASK21___ " and within this genus to the species " ___MASK21___ sapiens ". The " formal " introduction of this system of naming species is credited to Carl Linnaeus , effectively beginning with his work " Species Plantarum " in 1753 . But Gaspard Bauhin , in as early as 1623 , had introduced in his book " Pinax theatri botanici " ( English , " Illustrated exposition of plants ") many names of genera that were later adopted by Linnaeus . ___MASK83___ is a genus of about 1000 species of forbs and shrubs in the family ___MASK29___ . Some species are known as ironweed . Some species are edible and of economic value . They are known for having intense purple flowers . The genus is named for the English botanist William Vernon . There are numerous distinct subgenera and subsections in this genus . This has led some botanists to divide this large genus into several distinct genera . For instance , the " Flora of North America " only recognizes about 20 species in " ___MASK83___ " sensu stricto , 17 of which are in North America north of Mexico , with the others being found in South America .