Native Plant Conservation

Preserving existing natural areas at the San Diego Botanic Garden is very important. The Garden is located in Encinitas, California within a mile of the coast. There are approximately eleven acres of natural areas and restored natural areas in the Garden. The local southern maritime chaparral and coastal sage scrub plant communities are some of the nation’s most endangered vegetation types as they are small in size and restricted to coastal areas. Over the past century these Southern California coastal areas have been in high demand for urban development.

Southern Maritime Chaparral & Coastal Sage Scrub

For full plant views click on each image below.

Image	Botanical Name	Common Name	Where in the Garden
	Artemisia californica	Coastal Sagebrush	Overlook Natural Area, Native Plants, Native Peoples, California Gardenscapes Herb Garden
	Salvia mellifera	Black Sage	Overlook Natural Area, Native Plants, Native Peoples, California Gardenscapes Herb Garden
	Eriogonum fasciculatum	California Buckwheat	Overlook Natural Area, Native Plants, Native Peoples, California Gardenscapes Herb Garden
	Rhus integrifolia	Lemonade-berry	Overlook Natural Area, Native Plants, Native Peoples, California Gardenscapes Herb Garden
	Encelia californica	Bush Sunflower	Overlook Natural Area, Native Plants, Native Peoples, California Gardenscapes Herb Garden

Southern Maritime Chaparral grows along the coast from southern Orange County to Point Loma. It is associated with coastal fog and eroded sandstone soils. Although primarily a chamise and black sage chaparral, it includes a number of rare, endemic plant species, including several of the following species.

For full plant views click on each image below.

Image	Botanical Name	Common Name	Where in the Garden
	Arctostaphylos glandulosa ssp. crassifolia Plant of the Month	Del Mar Manzanita	Overlook Natural Area, Native Plants, Native Peoples, California Gardenscapes Herb Garden
	Baccharis vanessae	Encinitas Baccharis	Overlook Natural Area, Native Plants, Native Peoples, California Gardenscapes Herb Garden
	Ceanothus verrucosus	Warty-stem Ceanothus	Overlook Natural Area, Native Plants, Native Peoples, California Gardenscapes Herb Garden
	Quercus dumosa	Coast Scrub Oak	Overlook Natural Area, Native Plants, Native Peoples, California Gardenscapes Herb Garden
	Cneoridium dumosum	Bush Rue	Overlook Natural Area, Native Plants, Native Peoples, California Gardenscapes Herb Garden
	Eriodictyon crassifolium var. crassifolium	Thick-leaf Yerba Santa	Overlook Natural Area, Native Plants, Native Peoples, California Gardenscapes Herb Garden
	Opuntia littoralis	Prickley Pear Cactus	Overlook Natural Area, Native Plants, Native Peoples, California Gardenscapes Herb Garden

Endangered Species

Del Mar Manzanita (Arctostaphylos glandulosa ssp. crassifolia)

Del Mar Manzanita (Arctostaphylos glandulosa ssp. crassifolia) is a federally endangered subspecies that grows along the coast from Encinitas, California south into Baja California in maritime chaparral. They are found on sandstone terraces within five to ten miles of the coast.
Today they often survive on sandstone topography that is too rugged and steep for easy development. This manzanita is adapted to wildfires, regrowing from large basal burls.

Del Mar Manzanita grows in the natural area to the east of the Overlook boardwalk and along the trail on the east side of Native Plant, Native People.

Photos: Sally Sandler

Nevin's Barberry or Mahonia Berberis nevinii (syn. Mahonia nevinii)

Nevin's Barberry (Berberis nevinii) is a federally endangered species native to isolated riparian sites in Los Angeles, Riverside, and San Bernadino Counties with only a couple of reported sites in San Diego County. This large dense evergreen shrub grows up to 10’ high x 10’ wide and is quite attractive with small prickly, grey compound leaves. Small yellow flowers bloom in late winter to early spring and are followed by small clusters of red fruits in summer. Nursery propagated plants are occasionally available, especially from native plant nurseries.

Large specimens of Nevin’s barberry grow in California Gardenscape, Fire Safety Garden and the Herb Garden.

Photos: Herb Knufken and Rachel Cobb

Orcutt’s Hazardia or Goldenbush (Hazardia orcuttii)

Orcutt’s hazardia or goldenbush (Hazardia orcuttii) is a subshrub in the Asteraceae or daisy family. The only wild population in the U.S.A. grows on a small hilltop only two miles from the Botanic Garden. There are only a few populations in northern Baja California. This is listed as a state of California threatened species.

The plants generally grow up to three feet tall. They have small evergreen leaves. In late summer they produce small yellow blooms. In a reintroduction project by the California Fish and Game Commission several hundred plants were propagated and planted in a reintroduction effort in several local sites.In 1995 thirty plants in five-gallon nursery containers were planted in the Garden in cooperation with the state and the Center for Natural Lands Management. They were planted in a plot of clay loam soil that had originally come from the same area where the naturally occurring population is found. Most of the plants survived and have since produced several seedlings. The area where these plants grow is within one of the Garden’s natural areas. They can be seen along the west side of the Native Peoples, Native Plants trail.

The San Diego Botanic Garden has conservation-related interpretive signs about these species and their plant communities. We provide conservation information about them as well as other non-native species of conservation concern in educational classes, tours, docent programs, and on our website.

Photos: Rachel Cobb

Otay Mesa Rose (Rosa minutifolia)

This short, thorny rose has attractive, fragrant pink blooms from January to June. It has tiny compound leaves. Only two plants of Otay Mesa rose (Rosa minutifolia) remain in the wild in the U.S.A. where they grow on the U.S.-Mexico border. The species ranges further south into northern Baja California.

At SDBG this can be seen at the Fire Safety Display by the parking lot and on the west side of California Gardenscape.

Photos: Rachel Cobb

Shaw's Agave (Agave shawii)

Shaw’s agave is a small to medium-sized agave with attractive green leaves and reddish brown spines. It forms large clumps over time. After a number of years large, spectacular flower spikes bloom, after which the individual plant dies. Shaw’s agave once grew along coastal San Diego, but in the wild only one plant remains along the U.S.-Mexico border. Further south this agave grows along the Pacific coast of northern Baja.

At SDBG Shaw’s agave can be seen in the New World Desert Garden and California Gardenscape.

Photos: Rachel Cobb

See the Native Plants and Native People Trail Page

Banner Photo:Del Mar Manzanita | Rachel Cobb