Symphyotrichum parviflorum (formerly Symphyotrichum subulatum var. parviflorum) is an annual and herbaceous plant commonly known as southwestern annual saltmarsh aster.[4] 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.
| Symphyotrichum parviflorum | |
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| S. parviflorum growing at Coyote Hills Regional Park in Alameda County, California | |
Scientific classification 
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| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Asterids |
| Order: | Asterales |
| Family: | Asteraceae |
| Tribe: | Astereae |
| Subtribe: | Symphyotrichinae |
| Genus: | Symphyotrichum |
| Subgenus: | Symphyotrichum subg. Astropolium |
| Species: | S. parviflorum
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| Binomial name | |
| Symphyotrichum parviflorum | |
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| Native distribution[1] | |
| Synonyms[1][3] | |
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Basionym
Alphabetical list
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Description
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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.[5]
Taxonomy
editThe basionym of Symphyotrichum parviflorum is Aster parviflorus, and it was first described by Christian Gottfried Daniel Nees von Esenbeck ("Nees") in 1818.[2] It also has been called Symphyotrichum expansum with the basionym Erigeron expansus[3] and Symphyotrichum subulatum var. parviflorum.[5]
Distribution and habitat
editSymphyotrichum parviflorum is native to Mexico, the Caribbean, most of Central America, Ecuador, and the southwestern United States. It is an introduced species in central Europe.[1] Flora of North America reports an introduction of the species in Hawaii and Japan. It grows in marshy habitats and roadsides at 0–1,100 meters (0–3,600 feet), sometimes up to 4,000 m (13,100 ft), and it is often considered weedy.[5]
Conservation
editAs of December 2021[update], NatureServe gives no global status rank to this plant. It does rank it as Critically Imperiled in Nevada.[6]
Citations
editReferences
edit- Brouillet, L.; Semple, J.C.; Allen, G.A.; Chambers, K.L.; Sundberg, S.D. (2006). "Symphyotrichum subulatum var. parviflorum". In Flora of North America Editorial Committee (ed.). Flora of North America North of Mexico (FNA). Vol. 20. New York and Oxford: Oxford University Press. Retrieved 30 December 2021 – via eFloras.org, Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
- Hassler, M. (8 December 2021). "Symphyotrichum parviflorum (Nees) Greuter – World Plants: Synonymic Checklists of the Vascular Plants of the World". In Bánki, O.; Roskov, Y.; Döring, M.; Ower, G.; Vandepitte, L.; Remsen, D.; Hobern, D.; Schalk, P.; DeWalt, R.E.; Keping, M.; Miller, J.; Orrell, T.; Aalbu, R.; Adlard, R.; Adriaenssens, E.; Aedo, C.; Aescht, E.; Akkari, N.; Alonso-Zarazaga, M.A.; et al. (eds.). Species 2000 & ITIS Catalogue of Life, 18 December 2021. Leiden, Netherlands: Naturalis Biodiversity Center. ISSN 2405-8858. Retrieved 30 December 2021.
- "Aster parviflorus Nees, Syn. Aster. Herb. 29 (1818)". International Plant Names Index (IPNI). Royal Botanic Gardens, Kew; Harvard University Herbaria & Libraries; Australian National Botanic Gardens. Retrieved 30 December 2021.
- NatureServe (6 December 2021). "Symphyotrichum expansum Desert American-aster". explorer.natureserve.org. Arlington, Virginia. Retrieved 30 December 2021.
- POWO (2021). "Symphyotrichum expansum (Poepp. ex Spreng.) G.L.Nesom". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 30 December 2021.
- USDA, NRCS (2014). "Symphyotrichum expansum". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 30 December 2021.