From Wikipedia
Open on Wikipedia
| Ambrosia chamissonis | |
|---|---|
| |
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Asterids |
| Order: | Asterales |
| Family: | Asteraceae |
| Tribe: | Heliantheae |
| Genus: | Ambrosia |
| Species: | A. chamissonis
|
| Binomial name | |
| Ambrosia chamissonis | |
| Synonyms[2] | |
| |
Ambrosia chamissonis is a species of ragweed known by the common names silver burr ragweed, silver beachweed and (silver) beach bur(r).[3]
It is known from most of the coastline of western North America from Alaska to Baja California, where it is a resident of beaches and other sandy coastal habitats.[4][5]
Description
[edit]Ambrosia chamissonis is a large, sprawling perennial herb exceeding 3 metres (9.8 ft) in maximum width. The stems are roughly or softly hairy and longitudinally ridged. The plentiful leaves are a few centimeters long, woolly and silver-green, and variable in shape.[4]
The plant is monoecious, with male and female flowers on each individual. Staminate (male) flower heads containing many pale colored florets occur at the tip of the inflorescence, with pistillate (female) flower heads clustered below them. Each pistillate head contains a single tiny flower which develops into a fruit. The fruit is a brown bur up to a centimeter wide covered in sharp spines.[6]
References
[edit]- ^ "NatureServe Explorer - Ambrosia chamissonis". NatureServe Explorer Ambrosia chamissonis. NatureServe. 2022-06-22. Retrieved 22 Jun 2022.
- ^ The Plant List Ambrosia chamissonis (Less.) Greene
- ^ "Ambrosia chamissonis Calflora". www.calflora.org. Retrieved 2025-08-29.
- ^ a b "Ambrosia chamissonis in Flora of North America @ efloras.org". www.efloras.org. Retrieved 2025-08-29.
- ^ "Distribution". 2014-11-02. Retrieved 2025-08-29.
- ^ "Archived TJM 1993 treatment for AMBROSIA chamissonis". ucjeps.berkeley.edu. Retrieved 2025-08-29.
External links
[edit]
- Ambrosia chamissonis in the CalPhotos photo database, University of California, Berkeley
 | This Heliantheae article is a stub. You can help Wikipedia by expanding it. |