Artemisia nesiotica is a rare California species of sagebrush in the daisy family, known by the common name island sagebrush. It is endemic to the Channel Islands of California, found on 3 of the 8 islands (San Nicolas, San Clemente, and Santa Barbara Islands).
Artemisia nesiotica is a small shrub growing up to about 50 cm (20 inches) tall and generally rounded in shape. It produces several thin, upright stems from a woody base. The foliage is made up of woolly leaves divided into many thin, flat, threadlike segments. The inflorescence is a narrow cluster of several flower heads. The fruit is a tiny resinous achene with a pappus of hairs.
The earliest name given to the plaint was Crossostephium insulare, coined by Per Axel Rydberg in 1916. In 1935, Philip Alexander Munz declared this to be a variety of Artemisia californica. Peter Raven later wanted to recognize the Channel Island plants as a distinct species within Artemisia, but the name Artemisia insularis had already been used for a Kuril Islands plant in 1936. Hence Raven's new name, Artemisia nesiotica.
- "NatureServe Explorer - Artemisia nesiotica". NatureServe Explorer Artemisia nesiotica. NatureServe. 2022-05-30. Retrieved 30 May 2022.
- The Plant List Artemisia nesiotica P.H.Raven
- Calflora taxon report, University of California, Artemisia nesiotica Raven, island sage brush, island sagebrush
- Flora of North America Vol. 19, 20 and 21 Page 530 Island sagebrush, Artemisia nesiotica P. H. Raven, Aliso. 5: 341. 1963.
- Rydberg, Per Axel 1916. in Britton, Nathaniel Lord, North American Flora 34(3): 244 description in English
- Munz, Philip Alexander 1935. Manual of Southern California Botany 601
- Kitamura, Siro 1936. Acta Phytotaxonomica et Geobotanica 5: 93
- Raven, Peter Hamilton 1963. Aliso 5(3): 341