Ammannia robusta
{{Short description|Plant species in the loosestrife family}}
{{Speciesbox
| image = Grand redstem (Ammannia robusta) (26236827096).jpg
| status = LC
| status_system = IUCN3.1
| status_ref = {{cite journal |author=Maiz-Tome, L.|name-list-style=amp |title=Ammannia robusta |journal=The IUCN Red List of Threatened Species |volume=208 |at=e.T64263777A67728508. |publisher=IUCN |year=2016 |doi=10.2305/IUCN.UK.2016-1.RLTS.T64263777A67728508.en|doi-access=free }}
| genus = Ammannia
| species = robusta
| synonyms_ref = {{cite POWO |id=552767-1 |title=Ammannia robusta Heer & Regel |access-date=19 February 2025}}
| synonyms = {{Collapsible list | {{Species list
| Ammannia alcalina | Blank.
| Ammannia coccinea subsp. robusta | (Heer & Regel) Koehne
| Ammannia sanguinolenta subsp. robusta | (Heer & Regel) Koehne
}}
}}
}}
Ammannia robusta is a species of flowering plant in the loosestrife family known by the common name grand redstem. It is widespread across much of North America (from British Columbia and Ontario to Guatemala) with additional populations in southeastern Brazil.[http://bonap.net/MapGallery/County/Ammannia%20robusta.png Biota of North America Program 2014 county distribution map][https://www.biodiversitylibrary.org/page/9254652#page/417/mode/1up Graham, S. A. T. 1985. A revision of Ammannia (Lythraceae) in the Western Hemisphere. Journal of the Arnold Arboretum 66(4): 395–420] includes descriptions and distribution maps for all 5 species
Description
Ammannia robusta grows in moist places, such as ditches and pond margins. It is an annual herb reaching up to 100 cm in height when growing erect. The leaves are up to 8 cm (3 inches) long and linear to lance-shaped. The leaves and stem are green to red. The inflorescences are clusters of up to five flowers in the leaf axils. The flowers are urn-shaped with light lavender petals about 5 mm long and protruding stamens with yellow anthers. The fruit is a spherical capsule about 5 mm wide containing several tiny seeds.[http://ucjeps.berkeley.edu/cgi-bin/get_JM_treatment.pl?5029,5030,5032 Jepson Manual Treatment]
References
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External links
- [http://calphotos.berkeley.edu/cgi/img_query?query_src=photos_index&where-taxon=Ammannia+robusta Calphotos Photo gallery, University of California]
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Category:Flora of Northern America
Category:Plants described in 1842
Category:Taxa named by Eduard August von Regel
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