Endemics in Family Order

Apiaceae
Lomatium insulare N

Asparagaceae
Brodiaea kinkiensis Cl
Triteleia clementina Cl

Asteraceae
Hazardia detonsa W
Malacothrix foliosa ssp. foliosa Cl
Malacothrix indecora Cr
Malacothrix junakii A
Malacothrix saxatilis var. implicata W
Malacothrix squalida Cr
Munzothamnus blairii Cl

Berberidaceae
Berberis pinnata ssp.insularis Cr

Brassicaceae
Arabis hoffmannii W
Sibara filifolia Cr
Thysanocarpus conchuliferus Cr

Cistaceae
Helianthemum greenei Cr

Convolvulaceae
Calystegia macrostegia W

Crassulaceae
Dudleya blochmanae var. insularis R
Dudleya candelabrum W
Dudleya greenei Cr
Dudleya hassei Ca
Dudleya nesiotica Cr
Dudleya traskiae (B)
Dudleya virens ssp. virens Cl

Ericaceae
Arctostaphylos catalinae Ca
Arctostaphylos confertiflora R
Arctostaphylos insularis Cr
Arctostaphylos tomentosa ssp. insulicola Cr
Arctostaphylos tomentosa ssp. subcordata Cr
Arctostaphylos vridissima Cr

Fabaceae
Astragalus miguelensis Cr
Astragalus nevinii Cl
Astragalus traskiae N
Lotus argophllus var. niveus Cr
Lotus dendroideus var. dendroideus W
Lotus dendroideus var. traskiae Cl

Fagaceae
Quercus macdonaldii Cr
Quercus pacifica W
Quercus tomentella Cr

Grossulariaceae
Ribes thacherianum Cr

Malvaceae
Malacothamnus clementinus Cl
Malacothamnus fasiculatus spp. nesioticus Cr

Onagraceae
Camissonia guadalupensis ssp. clementina Cl

Papaveraceae
Dendromecon harfordii W
Platystemon californicus var. ciliatus B

Pinaceae
Pinus torreyana var. insularis R

Polemoniaceae
Gilia nevinii Cr
Gilia tenuiflora var. hoffmannii R

Polygonaceae
Erigonum arborescens W
Erigonum giganteum var. compactum B
Eriogonum giganteum var. formosum Cl
Eriogonum giganteum var. giganteum Ca
Eriogonum grande var. dunklei M
Eriogonum grande var. grande Cr
Eriogonum grande var. rubescens Cr
Eriogonum grande ssp. tamorum N

Ranunculaceae
Delphinium variegatum ssp. kinkiense Cl
Delphinium variegatum ssp. thornei Cl

Rhamnaceae
Ceanothus arboreus Cr
Ceanothus megacarpus var. insularis W
Ceanothus megacarpus var. megacarpus Cr
Rhammus pirifolia Cr

Rosaceae
Adenostoma fasciculatum var. prostratum Cr
Cercocarpus traskiae Ca
Lyonothamnus floribundus ssp. aspleniifolius W
Lyonothamnus floribundus ssp. floribundus Ca

Rubiaceae
Galium angustifolium ssp. foliosum Cr
Galium buxifolium Cr
Galium catalinense ssp. acrispum Cl
Galium catalinense ssp. catalinense Ca
Galium nuttallii ssp. insulare Cr

Saxifragaceae
Heuchera maxima W
Jepsonia malvifolia Cr
Lithophragma maximum Cl

Scrophulariaceae
Castilleja grisea Cl
Castilleja lanata ssp. hololeuca W
Mimulus brandegei Cr
Mimulus flemingii W

Solanaceae
Solanum clokeyi W


Endemics in Alphabetical Order

Adenostoma fasciculatum var. prostratum Cr
Arabis hoffmannii W
Arctostaphylos catalinae Ca
Arctostaphylos confertiflora R
Arctostaphylos insularis Cr
Arctostaphylos tomentosa ssp. insulicola Cr
Arctostaphylos tomentosa ssp. subcordata Cr
Arctostaphylos vridissima Cr
Astragalus miguelensis Cr
Astragalus nevinii Cl
Astragalus traskiae N
Berberis pinnata ssp.insularis Cr
Brodiaea kinkiensis Cl
Calystegia macrostegia W
Camissonia guadalupensis ssp. clementina Cl
Castilleja grisea Cl
Castilleja lanata ssp.hololeuca W
Ceanothus arboreus Cr
Ceanothus megacarpus var. insularis W
Ceanothus megacarpus var. megacarpus Cr
Cercocarpus traskiae Ca
Delphinium variegatum ssp. kinkiense Cl
Delphinium variegatum ssp. thornei Cl
Dendromecon harfordii W
Dudleya blochmanae var. insularis R
Dudleya candelabrum W
Dudleya greenei Cr
Dudleya hassei Ca
Dudleya nesiotica Cr
Dudleya traskiae (B)
Dudleya virens ssp. virens Cl
Erigonum arborescens W
Erigonum giganteum var. compactum B
Eriogonum giganteum var. formosum Cl
Eriogonum giganteum var. giganteum Ca
Eriogonum grande ssp. tamorum N
Eriogonum grande var. dunklei M
Eriogonum grande var. grande Cr
Eriogonum grande var. rubescens Cr
Galium angustifolium ssp. foliosum Cr
Galium buxifolium Cr
Galium catalinense ssp. acrispum Cl
Galium catalinense ssp. catalinense Ca
Galium nuttallii ssp. insulare Cr
Gilia nevinii Cr
Gilia tenuiflora var. hoffmannii R
Hazardia detonsa W
Helianthemum greenei Cr
Heuchera maxima W
Jepsonia malvifolia Cr
Lithophragma maximum Cl
Lomatium insulare N
Lotus argophllus var. niveus Cr
Lotus dendroideus var. dendroideus W
Lotus dendroideus var. traskiae Cl
Lyonothamnus floribundus ssp. aspleniifolius W
Lyonothamnus floribundus ssp. floribundus Ca
Malacothamnus clementinus Cl
Malacothamnus fasiculatus spp. nesioticus Cr
Malacothrix foliosa ssp. foliosa Cl
Malacothrix indecora Cr
Malacothrix junakii A
Malacothrix saxatilis var. implicata W
Malacothrix squalida Cr
Mimulus brandegei Cr
Mimulus flemingii W
Munzothamnus blairii Cl
Pinus torreyana var. insularis R
Platystemon californicus var. ciliatus B
Quercus macdonaldii Cr
Quercus pacifica W
Quercus tomentella Cr
Rhammus pirifolia Cr
Ribes thacherianum Cr
Sibara filifolia Cr
Solanum clokeyi W
Thysanocarpus conchuliferus Cr
Triteleia clementina Cl


Summary

Included here are the Channel Islands of California - a chain of eight islands located off the coast of Southern California. They include Anacapa (A), Santa Barbara (B), Santa Catalina (Ca), Santa Cruz (Cr), Santa Rosa (R), San Clemente (Cl), San Miguel (M) and San Nicholas(N). The endemic species are annotated with the abbreviations above to show which islands they occur. Species on two or more islands are annotated with W.

Of the endemic vascular plants so far recorded there are about 101 species, sub-species and varieties in 39 genera and 25 families but no endemic genera.

References

Philbrick, R. 1980. Distribution and evolution of endemic plants of the Channel Islands. In: The California Islands: Proceedings of a multidisciplinary symposium. Ed. D. M. Power.

Philbrick, R. N. & Haller, J. R. 1977. The southern Californian islands. In: Terrestrial Vegetation of California. Eds. M. G. Barbour and J. Major. John Wiley & Sons.