CPC Plant Profile: South Texas Ragweed
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Plant Profile

South Texas Ragweed (Ambrosia cheiranthifolia)

Photo Credit: San Antonio Botanical Garden
  • Global Rank: G2 - Imperiled
  • Legal Status: Federally Endangered
  • Family: Asteraceae
  • State: TX
  • Nature Serve ID: 150493
  • Date Inducted in National Collection:

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Nature Serve Biotics
  • 05/02/2017

Only an estimated 20 population centers survive, and since most popluations are clonal, these may represent very few genetically different individual plants. The species' geographic range is limited to coastal south Texas and northeastern Mexico. Much of its original habitat has been converted to agricultural fields and pastures. The remnant, fragmented native prairies and savannahs are threatened by continued habitat distruction, agricultural chemicals, and by invasive, non-native grasses, which are commonly planted in the area.

  • 01/01/2010

Habitat conversion done for all native habitat

  • 01/01/2010

9-10 locations (probably more than we know of) near Violet, TX (at railroad right-of-way)

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Taxon Ambrosia cheiranthifolia
Authority A. Gray
Family Asteraceae
CPC Number 101
ITIS 36502
Common Names South Texas Ragweed | Rio Grande ragweed | South Texas ambrosia
Associated Scientific Names Ambrosia cheiranthifolia
Distribution NA
State Rank
State State Rank
Texas S2

weedy remnant areas that haven't been plowed roadsides cemetaries

Ecological Relationships

Common Name Name in Text Association Type Source InteractionID
Wind Confirmed Pollinator Link
Insects Suspected Pollinator Floral Link
Lead Institution State Reintroduction Type Year of First Outplanting

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