Native Plants
Digital Herbaria
Iva annua
Iva annua L.
Annual Marshelder, Marshelder, Sumpweed, Annual Marsh Elder, Marsh Elder
Asteraceae (Aster Family)
USDA Symbol: IVAN2USDA Native Status: L48 (N)
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Specimen & Label Data
Iva annua
Marsh-Elder
Asteraceae
Location: NE of low water crossing of Salado Creek by the road from main base of Fort Sam Houston to the Pershing Firing Range, San Antonio.Latitude: 0.000000
Habitat: Full sun. Damp, alluvial soil, often flooded.
Description: Taprooted annual, 4 dm tall, or more, Leaves opposite, to 12 cm long; ovate, becoming lacerate above, reduced in head bearing region to bracts. Heads in speciform arrangement (terminal). Phyllaries 3-4, free, cuneate, terminally rounded.
County: Bexar
Collector: Harry Cliffe
Collection Date: Oct 6, 1994
Specimen number: 686
Herbarium Owner: NPSOT
Herbarium ID: 1112
Accession Date: Feb 28, 1998
Accession Number: 104
Annotations: SCXRB (In flower)