Basic Information
Common Name: San Diego Marsh-elder
Scientific Name: Iva hayesiana
Species Code:
Management Category: VG (species not specifically managed for, but may benefit from vegetation management for VF species)
Occurrence Map
Table of Occurrences

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


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].


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

Literature Sources

[1] California Native Plant Society, Rare Plant Program. 2017. Inventory of Rare and Endangered Plants of California (online edition, v8-03 0.39). Website [accessed 29 September 2017].

[2] NatureServe. 2017. NatureServe Explorer: An online encyclopedia of life [web application]. Version 7.1. NatureServe, Arlington, Virginia. Available (Accessed: September 29, 2017 ). "

[3] Montalvo, A. M., L. K. Goode, and J. L. Beyers. 2010. Plant Profile for Iva hayesiana. Native Plant Recommendations for Southern California Ecoregions. Riverside-Corona Resource Conservation District and U.S. Department of Agriculture, Forest Service, Pacific Southwest Research Station, Riverside, CA. Online: "

[4] Munz, P. A. 1974. A Flora of Southern California. University of California Press, Berkeley, CA. "

[5] Hickman, J. C. 1993. The Jepson Manual: Higher Plants of California. University of California Press, Ltd., Los Angeles, CA." "

[6] Boczkiewicz, S. 2005. Biological Resources Report for the 2005 SDSU Campus Mater Plan Revision, San Diego, California. Dudek and Associates, Inc. for San Diego State University, San Diego, CA. "