South Texas ambrosia (Ambrosia cheiranthifolia)
Where Listed: WHEREVER FOUND
South Texas ambrosia is a herbaceous, perennial plant with erect stems. It is grayish-green in color with yellow flowers.
- States/US Territories in which the South Texas ambrosia, Wherever found is known to or is believed to occur: Texas
- US Counties in which the South Texas ambrosia, Wherever found is known to or is believed to occur: View All
- Additional species information
|Status||Date Listed||Lead Region||Where Listed|
|1994-08-24||Southwest Region (Region 2)||Wherever found|
» Federal Register Documents
|1994-08-24 00:00:00.0||59 FR 43648 43652||ETWP; Determination of Endangered Status for the Plants Ayenia limitaris (Texas Ayenia) and Ambrosia cheiranthifolia (South Texas Ambrosia)|
|1993-08-05 00:00:00.0||58 FR 41696 41700||ETWP; Proposed Rule to List the Plants Ayenia limitaris (Texas Ayenia) and Ambrosia cheiranthifolia (South Texas Ambrosia) as Endangered|
|2008-03-20 00:00:00.0||73 FR 14995 14997||5-Year Reviews of 28 Southwestern Species|
|Date||Citation Page||Title||Document Type|
|2008-03-20||73 FR 14995 14997||5-Year Reviews of 28 Southwestern Species||
|2010-12-20||South Texas Ambrosia (Ambrosia cheiranthifolia) 5-year Review|
» Critical Habitat
No critical habitat rules have been published for the South Texas ambrosia.
» Conservation Plans
No conservation plans have been created for South Texas ambrosia.
» Life History
South Texas ambrosia is found in grasslands and mesquite dominated shrublands.
South Texas ambrosia is found on various soils ranging from clay loams to sandy loams.
Movement / Home Range
South Texas ambrosia is known from northern Tamaulipas in Mexico, Cameron, Jim Wells, Kleberg and Nueces Counties in Texas.
South Texas ambrosia flowers from July through November. The plant spreads by rhizomes and one plant may consist of hundreds of stems.
The plant is 4-12 inches (10- 40 centimeters) high with 3 inches (7.6 centimeters) long leaves that are approximately 1.5 inches (4 centimeters) wide. The plantís silky grey pubescence (hair-like structures) makes South Texas ambrosia different from other Ambrosia species.
» Other Resources
NatureServe Explorer Species Reports -- NatureServe Explorer is a source for authoritative conservation information on more than 50,000 plants, animals and ecological communtities of the U.S and Canada. NatureServe Explorer provides in-depth information on rare and endangered species, but includes common plants and animals too. NatureServe Explorer is a product of NatureServe in collaboration with the Natural Heritage Network.
ITIS Reports -- ITIS (the Integrated Taxonomic Information System) is a source for authoritative taxonomic information on plants, animals, fungi, and microbes of North America and the world.
FWS Digital Media Library -- The U.S. Fish and Wildlife Service's National Digital Library is a searchable collection of selected images, historical artifacts, audio clips, publications, and video.