''Symphyotrichum parviflorum'' (formerly ''Symphyotrichum subulatum'' var. ''parviflorum'') is an

annual Annual may refer to: * Annual publication, periodical publications appearing regularly once per year **Yearbook **Literary annual * Annual plant *Annual report *Annual giving *Annual, Morocco, a settlement in northeastern Morocco *Annuals (band), ...

and

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 ...

commonly known as southwestern annual saltmarsh aster. It is native to Mexico, the Caribbean, most of Central America, Ecuador, and the southwestern United States. It is also known by the scientific name ''Symphyotrichum expansum''.

Description

Symphyotrichum subulatum parviflorum 52532112

Southwestern annual saltmarsh aster usually flowers from July through November, but sometimes into January. It has white, sometimes pink, ray florets surrounding yellow disk florets. As the plant is drying after pollination, each ray floret curls into 1 to 2 coils.

Taxonomy

The

basionym In the scientific name of organisms, basionym or basyonym means the original name on which a new name is based; the author citation of the new name should include the authors of the basionym in parentheses. The term "basionym" is used in both bota ...

of ''Symphyotrichum parviflorum'' is ''Aster parviflorus'', and it was first described by

Christian Gottfried Daniel Nees von Esenbeck Christian Gottfried Daniel Nees von Esenbeck (14 February 1776 – 16 March 1858) was a prolific German botanist, physician, zoologist, and natural philosopher. He was a contemporary of Goethe and was born within the lifetime of Linnaeus. ...

("Nees") in 1818. It also has been called ''Symphyotrichum expansum'' with the basionym ''Erigeron expansus'' and ''

Symphyotrichum subulatum ''Symphyotrichum subulatum'' (formerly ''Aster subulatus''), commonly known as eastern annual saltmarsh aster or, in Britain and Ireland where it is naturalized, annual saltmarsh aster, is an annual plant in the family Asteraceae native to the ...

'' var. ''parviflorum''.

Distribution and habitat

''Symphyotrichum parviflorum'' is native to Mexico, the Caribbean, most of Central America, Ecuador, and the southwestern United States. It is an

introduced species An introduced species, alien species, exotic species, adventive species, immigrant species, foreign species, non-indigenous species, or non-native species is a species living outside its native distributional range, but which has arrived the ...

in central Europe. ''

Flora of North America The ''Flora of North America North of Mexico'' (usually referred to as ''FNA'') is a multivolume work describing the native plants and naturalized plants of North America North America is a continent in the Northern Hemisphere and a ...

'' reports an introduction of the species in

Hawaii Hawaii ( ; haw, Hawaii or ) is a state in the Western United States, located in the Pacific Ocean about from the U.S. mainland. It is the only U.S. state outside North America, the only state that is an archipelago, and the only ...

and Japan. It grows in marshy habitats and roadsides at , sometimes up to , and it is often considered weedy.

Conservation

NatureServe NatureServe, Inc. is a non-profit organization based in Arlington County, Virginia, US, that provides proprietary wildlife conservation-related data, tools, and services to private and government clients, partner organizations, and the public. Nat ...

gives no global status rank to this plant. It does rank it as Critically Imperiled in

Nevada Nevada ( ; ) is a state in the Western region of the United States. It is bordered by Oregon to the northwest, Idaho to the northeast, California to the west, Arizona to the southeast, and Utah to the east. Nevada is the 7th-most extensive, ...

Citations

References

* * * * * * {{Taxonbar, from1=Q15555077, from2=Q15555068, from3=Q24691726, from4=Q110320957, from5=Q38782244 expansum Flora of the Caribbean Flora of Central America Flora of Ecuador Flora of Mexico Flora of the Southwestern United States Flora of the South-Central United States Flora of Alabama Flora of Florida Flora of Oklahoma Plants described in 1818 Taxa named by Christian Gottfried Daniel Nees von Esenbeck