SafePlants

Arctostaphylos myrtifolia: The Ione Manzanita

Arctostaphylos myrtifolia, commonly known as Ione manzanita, is a rare and fascinating plant species native to California.

Considerations for Pets

• The Ione manzanita is an evergreen shrub.

Taxonomy and Nomenclature

• Scientific Name: Arctostaphylos myrtifolia Parry
• Common Name: Ione manzanita
• Family: Ericaceae (Heath Family)
• Synonyms: Element Code: PDERI04240

Distribution and Habitat

• The Ione manzanita is endemic to the Sierra Nevada foothills of California. Specifically, it is found in Amador and Calaveras Counties.
• It is often found growing on acidic sandy soil on hardpan, particularly soils derived from the unique Ione formation.
• The species is limited in distribution due to its specific soil requirements.

Morphological Characteristics and Growth Habits

• Arctostaphylos myrtifolia is described as an evergreen shrub that lacks a basal burl.
• It typically attains a height of less than 2 meters.
• It can form chaparral habitats composed of low heath-like shrubs.

Ecological Role

• The Ione manzanita is a dominant species in sparse shrubland habitats.
• It is adapted to thrive on highly acidic soils.

Threats

• The Ione manzanita is listed as a threatened species.
• Diseases, such as branch cankers and infections by Phytophthora cinnamomi, are significant threats to its survival.

Interactions with Other Organisms

• Phytophthora cinnamomi is a destructive species affecting the Ione manzanita.

Further Information

• U.S. Fish & Wildlife Service Sacramento Fish & Wildlife Office Species Account: IONE MANZANITA. Arctostaphylos myrtifolia.
• Discover Life: Page about the biology, natural history, ecology, identification, and distribution of Arctostaphylos myrtifolia.
• Dave's Garden: A community that shares tips and ideas for gardens, along with seeds and plants.