Dissanthelium californicum is a rare species of grass. It was originally discovered on Santa Catalina, an island off California's coast in 1847 by U.S. botanist and naturalist William Gambel. It was later identified as growing on Guadalupe Island, on San Clemente Island and Catalina Island.
Camissoniopsis cheiranthifolia, the beach suncup or beach evening primrose, is a species of the evening primrose family and is native to open dunes and sandy soils of coastal California, Baja California and Oregon.
Ribes viburnifolium, is an uncommon North American species in the gooseberry family. It is known by the common names Catalina currant, Santa Catalina Island currant, island gooseberry and evergreen currant.
Arctostaphylos catalinae, known by the common name Santa Catalina Island manzanita, is a species of manzanita native to Southern California.
Arctostaphylos tomentosa is a species of manzanita known by the common name woollyleaf manzanita or woolley manzanita. This shrub is endemic to California.
Galium angustifolium is a species of flowering plant in the coffee family known by the common name narrowleaf bedstraw. It is native to California and Baja California, where it is most commonly found at low elevations in the mountains.
Galium buxifolium is a rare species of flowering plant in the coffee family known by the common names box bedstraw and island bedstraw. It is endemic to the Channel Islands of California, where it is known from about 26 populations on two of the islands. It is a federally listed endangered species of the United States.
Galium californicum is a species of flowering plant in the coffee family known by the common name California bedstraw.
Crocanthemum greenei is a rare species of flowering plant in the rock-rose family known by the common name island rush-rose. It is endemic to the Channel Islands of California, where it grows in the chaparral of the rocky seaside slopes. It is present on three of the eight islands, where it has historically been threatened by feral herbivores such as the Santa Cruz sheep and is making a gradual recovery. It is a federally listed threatened species.
Dendromecon harfordii, known by the common names Channel Islands tree poppy and Harford's tree poppy, is a species of flowering plant in the poppy family.
Galium nuttallii is a species of flowering plant in the coffee family known by the common names San Diego bedstraw and climbing bedstraw. It is native to the coast and coastal Peninsular and western Transverse Ranges of southern California and Baja California, where it is a member of chaparral and pine woodland plant communities. It is also found on the Channel Islands and on the mainland as far north as Santa Barbara County
Galium glabrescens is a species of flowering plant in the coffee family known by the common name Castle Lake bedstraw. It is native to the mountains of far northern California and southern Oregon, including the Klamath Mountains.
Galium hypotrichium is a species of flowering plant in the coffee family known by the common name alpine bedstraw. It is native to the western United States, where it grows in mountain and plateau habitats, including parts of the Great Basin and Sierra Nevada in California, Nevada, and Utah.
Galium parisiense is a species of flowering plant in the family Rubiaceae known by the common name wall bedstraw. A native of the Mediterranean area and Western Europe, it has become naturalised in North America and other parts of Europe.
Galium serpenticum is a species of flowering plant in the coffee family known by the common name intermountain bedstraw or many-flowered bedstraw. It is native to the northwestern United States, where it grows in mountain forests and meadows, mostly east of the crest of the Cascade Range. It occurs in Washington, Oregon, Idaho and extreme northern California.
Galium sparsiflorum is a species of flowering plant in the coffee family known by the common name Sequoia bedstraw. It is endemic to California, where it grows in shaded habitat in certain mountain ranges, including the Sierra Nevada.
Galium trifidum is a species of flowering plant in the coffee family, known by the common name three-petal bedstraw. It grows widespread in the arctic, temperate and subtropical regions of the Northern Hemisphere: northern and central Asia, northern and eastern Europe and much of North America.
Lyonothamnus is a monotypic genus of trees in the rose family containing the single living species Lyonothamnus floribundus, which is known by the common name Catalina ironwood, and the subspecies L. f. ssp. aspleniifolius and L. f. ssp. floribundus.
Orobanche californica, known by the common name California broomrape, is a species of broomrape. It is a parasitic plant growing attached to the roots of other plants, usually members of the Asteraceae.
Galium munzii is a species of plant in the family Rubiaceae. It is native to California, Arizona, Nevada, and Utah.
