San Diego Management & Monitoring Program


San Diego marsh-elder
Iva hayesiana


Kingdom Phylum Subphylum Class Order Suborder Family

Current distribution rangewide

Ranges from San Diego County to Baja California [1,2].


Known Populations in San Diego County

Native populations restricted to Coastal San Diego County [3]. Occurrences found on Conserved Lands in MUs 3,4, and 6 (Lusardi Creek Preserve and Escondido Creek).


List status

None.


Habitat affinities

Grows in marshes, swamps, and playas [1,2]. Alkaline flats, depressions, alkali marshes, sinks [4,5]. Salt and freshwater marshes and ecotones with coastal sage scrub [6].


Taxonomy and genetics

In the Asteraceae family [1,2].


Life history demography

A perrenial herb [1]. Seeds are small, less than 2 mm long and spindle-shaped [3].


Seasonal phenology

Blooms from April to October [1].


Pollination seed dispersal

Tiny achenes are likely dispersed by a combination of gravity, wind, and water as are related species of Asteracae [3].


Threats

Threatened by waterway channelization, coastal development [1,2], vehicles, and nonnative plants [1].


San Diego marsh-elder sources