Share

Digital Herbaria

Ambrosia trifida var. texana Scheele

Giant Ragweed, Texan great ragweed
Asteraceae (Aster Family)

USDA Symbol: AMTRT
USDA Native Status: Native to U.S.

()
click to enlarge

Specimen & Label Data

Ambrosia trifida var. texana

Giant Ragweed

Asteraceae

Location: NE corner of Salado Creek & low-water crossing on road from main base of Ft Sam Houston to Pershing Firing Range, San Antonio.
 Latitude: 0.000000

Habitat: Full sun. Damp, alluvial soil. Manay, among mixed herbaceous species.

Description: Tap-rooted annual, to 2.5 m tall. leaves opposite, scabrous, long petioled. Lower leaf blades orbicular, 3-5 cleft, becoming simple above. Margins serrage. Staminate heads racemose; pistillate heads clustered in axils below racemes.

County: Bexar
 Collector: Harry Cliffe
 Collection Date: Oct 12, 1994
 Specimen number: 706

Herbarium Owner: NPSOT
 Herbarium ID: 0995
 Accession Date: Jan 24, 1995
 Accession Number: 78

Annotations: MCFXB (In flower & fruit)

Return to List