Arctostaphylos myrtifolia is a rare species of manzanita known by the common name Ione manzanita. It is endemic to the Sierra Nevada foothills of California. It grows in the chaparral and woodland plant community on a distinctive acidic soil series, an oxisol of the Eocene-era Ione Formation, in western Amador and northern Calaveras counties.[2] There are only eleven occurrences, of which three have not been recorded since 1976.[3] This is a federally listed threatened species.[1]
^ ab"Ione manzanita (Arctostaphylos myrtifolia)". Environmental Conservation Online System. U.S. Fish & Wildlife Service. Retrieved 20 January 2024.
^ abTarp, Kirsten; Davis, Jason; Sacramento Field Office, U.S. Fish and Wildlife Service (26 May 1999). "Endangered and Threatened Wildlife and Plants; Determination of Endangered Status for the Plant Eriogonum apricum (inclusive of vars. apricum and prostratum) (Ione Buckwheat) and Threatened Status for the Plant Arctostaphylos myrtifolia (Ione Manzanita)". Federal Register. 64 (101): 28403–28413. 64 FR 28403
^NatureServe (5 January 2024). "Arctostaphylos myrtifolia". NatureServe Network Biodiversity Location Data accessed through NatureServe Explorer. Arlington, Virginia: NatureServe. Retrieved 20 January 2024.
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