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Ambrosia pumila
Also called San Diego ambrosia, Dwarf Burr Ragweed, San Diego Ragweed
Dwarf bur ragweed is a rare, hairy, gray-green perennial herb of the daisy family that spreads from underground rhizomes, growing up to about 0.5 m tall. It is a federally endangered wild plant of floodplains and vernal pool edges, so it is not commonly grown in gardens.
Ambrosia pumila is a rare species of herbaceous perennial plant known by the common names San Diego ragweed and San Diego ambrosia. It is native to far southern California, Baja California, and Baja California Sur. It grows in floodplains and open grasslands in proximity to wetland areas.
It is adapted to dry habitat, but only on upper floodplain fringes, or adjoining depressions containing vernal pools or similar structures. It is a plant of open habitat and is not tolerant of heavy shade.
Flatspine bur ragweed · Ambrosia leaf bur ragweed · Ambrosia arborescens · Annual ragweed · Lanceleaf ragweed · Silver bur ragweed · Rio Grande ragweed · San Diego bur ragweed · Weakleaf bur ragweed · Tucson bur ragweed · Triangle bur ragweed · Burrobush
Text excerpted from the Wikipedia article Ambrosia pumila by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.
The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.
Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.
