''Pterocaulon'' is a

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 ...

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

sunflower family Asteraceae () is a large family of flowering plants that consists of over 32,000 known species in over 1,900 genera within the order Asterales. The number of species in Asteraceae is rivaled only by the Orchidaceae, and which is the larger fam ...

, native to

North North is one of the four compass points or cardinal directions. It is the opposite of south and is perpendicular to east and west. ''North'' is a noun, adjective, or adverb indicating Direction (geometry), direction or geography. Etymology T ...

and

South America South America is a continent entirely in the Western Hemisphere and mostly in the Southern Hemisphere, with a considerably smaller portion in the Northern Hemisphere. It can also be described as the southern Subregion#Americas, subregion o ...

and to

Australasia Australasia is a subregion of Oceania, comprising Australia, New Zealand (overlapping with Polynesia), and sometimes including New Guinea and surrounding islands (overlapping with Melanesia). The term is used in a number of different context ...

. Blackroot is a common name for species native to North America. The plants are perennial herbs, frequently densely covered with woolly hairs. The generic name means "winged stem," referring to the

decurrent ''Decurrent'' (sometimes decurring) is a term used in botany and mycology to describe plant or fungal parts that extend downward. In botany, the term is most often applied to leaf blades that partly wrap or have wings around the stem or petio ...

leaf bases that give the appearance of wings running down the sides of the stems. ; SpeciesFlann, C (ed) 2009+ Global Compositae Checklist
Biota of North America Program 2013 county distribution maps
/ref> * ''

Pterocaulon alopecuroides ''Pterocaulon'' is a genus of flowering plants in the sunflower family, native to North and South America and to Australasia. Blackroot is a common name for species native to North America. The plants are perennial herbs, frequently densely cov ...

'' - South America, Puerto Rico, Virgin Islands * ''

Pterocaulon angustifolium ''Pterocaulon'' is a genus of flowering plants in the Asteraceae, sunflower family, native to North America, North and South America and to Australasia. Blackroot is a common name for species native to North America. The plants are perennial he ...

'' - Brazil, Argentina, Paraguay, Uruguay * ''

Pterocaulon balansae ''Pterocaulon'' is a genus of flowering plants in the sunflower family, native to North and South America and to Australasia. Blackroot is a common name for species native to North America. The plants are perennial herbs, frequently densely cov ...

'' - Brazil, Argentina, Paraguay, Uruguay * ''

Pterocaulon cordobense ''Pterocaulon'' is a genus of flowering plants in the sunflower family, native to North and South America and to Australasia. Blackroot is a common name for species native to North America. The plants are perennial herbs, frequently densely cov ...

'' - Brazil, Argentina, Paraguay, Uruguay * ''

Pterocaulon globuliflorus ''Pterocaulon'' is a genus of flowering plants in the sunflower family, native to North and South America and to Australasia. Blackroot is a common name for species native to North America. The plants are perennial herbs, frequently densely cov ...

'' - Western Australia, Northern Territory * ''

Pterocaulon lanatum ''Pterocaulon'' is a genus of flowering plants in the sunflower family, native to North and South America and to Australasia. Blackroot is a common name for species native to North America. The plants are perennial herbs, frequently densely cov ...

'' - Brazil, Bolivia, Paraguay,

Salta Salta () is the capital and largest city in the Provinces of Argentina, Argentine province of Salta Province, the same name. With a population of 618,375 according to the 2010 census, it is also the List of cities in Argentina, 7th most-populous ...

* ''

Pterocaulon lorentzii ''Pterocaulon'' is a genus of flowering plants in the sunflower family, native to North and South America and to Australasia. Blackroot is a common name for species native to North America. The plants are perennial herbs, frequently densely cov ...

'' - Brazil, Argentina, Paraguay, Uruguay, Bolivia * ''

Pterocaulon niveum ''Pterocaulon'' is a genus of flowering plants in the sunflower family, native to North and South America and to Australasia. Blackroot is a common name for species native to North America. The plants are perennial herbs, frequently densely cov ...

'' - Western Australia, Northern Territory * ''

Pterocaulon polypterum ''Pterocaulon'' is a genus of flowering plants in the sunflower family, native to North and South America and to Australasia. Blackroot is a common name for species native to North America. The plants are perennial herbs, frequently densely cov ...

'' - Brazil, Argentina, Uruguay * ''

Pterocaulon polystachyum ''Pterocaulon'' is a genus of flowering plants in the sunflower family, native to North and South America and to Australasia. Blackroot is a common name for species native to North America. The plants are perennial herbs, frequently densely cov ...

'' - Brazil, Argentina, Paraguay, Uruguay * ''

Pterocaulon purpurascens ''Pterocaulon'' is a genus of flowering plants in the sunflower family, native to North and South America and to Australasia. Blackroot is a common name for species native to North America. The plants are perennial herbs, frequently densely cov ...

'' -

Mato Grosso Mato Grosso ( – ) is one of the states of Brazil, the List of Brazilian states by area, third largest by area, located in the Central-West Region, Brazil, Central-West region. The state has 1.66% of the Brazilian population and is responsible ...

, Argentina, Paraguay, Bolivia * ''Pterocaulon pycnostachyum '' - United States (Alabama, AL Georgia (U.S. state), GA Florida, FL South Carolina, SC North Carolina, NC) * ''Pterocaulon redolens'' - Indochina, Hainan, Orissa, India, Orissa, Philippines, Maluku (province), Maluku, New Guinea, eastern Australia * ''Pterocaulon rugosum'' - Brazil, Argentina, Paraguay * ''Pterocaulon serrulatum'' - Western Australia, Northern Territory, South Australia * ''Pterocaulon sphacelatum'' - Australia * ''Pterocaulon sphaeranthoides'' - Western Australia, Northern Territory, Queensland * ''Pterocaulon spicatum'' - South America * ''Pterocaulon verbascifolium'' - Western Australia, Northern Territory, Queensland * ''Pterocaulon virgatum'' - Central America, Central +

, West Indies, United States (Texas, TX Louisiana, LA)

References

Pterocaulon, Asteraceae genera Taxa named by Stephen Elliott {{Inuleae-stub