| Ammannia robusta | |
|---|---|
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Scientific classification 
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| Kingdom: | Plantae |
| Clade: | Embryophytes |
| Clade: | Tracheophytes |
| Clade: | Spermatophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Rosids |
| Order: | Myrtales |
| Family: | Lythraceae |
| Genus: | Ammannia |
| Species: | A. robusta
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| Binomial name | |
| Ammannia robusta | |
| Synonyms2 | |
|
List
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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.34
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.54
References
References
- Maiz-Tome, L. (2016). "Ammannia robusta". The IUCN Red List of Threatened Species. 208. IUCN. e.T64263777A67728508. doi:10.2305/IUCN.UK.2016-1.RLTS.T64263777A67728508.en.
- "Ammannia robusta Heer & Regel". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 19 February 2025.
- Biota of North America Program 2014 county distribution map
- 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
- Jepson Manual Treatment