Ambrosia acanthicarpa is a North American species of bristly annual plants in the family Asteraceae. Members of the genus Ambrosia are called ragweeds. The species has common names including flatspine bur ragweed,[3] Hooker's bur-ragweed,[4] annual burrweed, annual bur-sage, and western sand-bur. The plant is common across much of the western United States and in the Prairie Provinces of Canada.[5][6]
| Ambrosia acanthicarpa | |
|---|---|
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Scientific classification 
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| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Asterids |
| Order: | Asterales |
| Family: | Asteraceae |
| Genus: | Ambrosia |
| Species: | A. acanthicarpa
|
| Binomial name | |
| Ambrosia acanthicarpa | |
| Synonyms[2] | |
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This spiny, weedy plant grows in clumps of many erect stems which may reach over a meter in height. Its gray-green stems are covered in a coat of stiff, bristly hairs. The few rough leaves are several centimeters long. The racemes of flowers are more plentiful, with each hairy flower head a few millimeters wide. The spiny, burr-like pistillate heads have pointed, twisting bracts and the staminate heads are rounded. The species is adaptable and grows well in disturbed areas, easily becoming weedy.[7]
References
edit- ^ "NatureServe Explorer - Ambrosia acanthicarpa". NatureServe Explorer Ambrosia acanthicarpa. NatureServe. 2022-06-22. Retrieved 22 Jun 2022.
- ^ The Plant List Ambrosia acanthicarpa Hook.
- ^ NRCS. "Ambrosia acanthicarpa". PLANTS Database. United States Department of Agriculture (USDA). Retrieved 8 January 2016.
- ^ BSBI List 2007 (xls). Botanical Society of Britain and Ireland. Archived from the original (xls) on 2015-06-26. Retrieved 2014-10-17.
- ^ Biota of North America Program 2013 county distribution map
- ^ Great Plains Flora Association. 1986. Flora of the Great Plains i–vii, 1–1392. University Press of Kansas, Lawrence.
- ^ Flora of North America Vol. 21 Page 15 Ambrosia acanthicarpa Hooker, Fl. Bor.-Amer. 1: 309. 1833.
External links
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