Lycopodium clavatum is the most widespread species in the genus Lycopodium in the clubmoss family.
Allium validum is a species of flowering plant commonly called swamp onion, wild onion, Pacific onion, or Pacific mountain onion. It is native to the Cascade Range, the Sierra Nevada, the Rocky Mountains, and other high-elevation regions in California, Oregon, Washington, Nevada, Idaho and British Columbia. It is a perennial herb and grows in swampy meadows at medium and high elevations.
Ribes bracteosum, the stink currant, is a species of currant native to western coastal North America from southeastern Alaska to Mendocino County in California.
Rumex hypogaeus, commonly known in English as southern threecornerjack, devil's thorn, or double gee, is a herbaceous plant of the Polygonaceae. It is native in South Africa and is an invasive species in Australia, Texas in the USA, and Pakistan.
Arctotis stoechadifolia, the African daisy or white arctotis, is a rare species of South African plants in the family Asteraceae. It is a rare plant found only in sand dunes along the West coast of Cape Province.
Ambrosia pumila is a rare species of herbaceous perennial plant known by the common names San Diego ragweed and San Diego ambrosia. It is native to far southern California, Baja California, and Baja California Sur. It grows in floodplains and open grasslands in proximity to wetland areas.
Arctotheca is a small genus of flowering plants in the family Asteraceae. They are annuals or perennials native to southern Africa. It is becoming an invasive weed in other parts of the world.
Artemisia palmeri is a rare species of sagebrush known by the common names San Diego sagewort and Palmer sagewort.
Chaenactis santolinoides is a species of flowering plant in the daisy family known by the common name Santolina pincushion. It is found in California.
Malva nicaeensis is a species of flowering plant in the mallow family known by the common names bull mallow and French mallow.
Ranunculus eschscholtzii is a species of buttercup flower known by the common name Eschscholtz's buttercup.
Rubus ulmifolius is a species of wild blackberry known by the English common name elmleaf blackberry or thornless blackberry and the Spanish common name zarzamora. It is native to Europe and North Africa, and has also become naturalized in parts of the United States, Australia, and southern South America.
Arctotheca populifolia is a species of flowering plant in the family Asteraceae known by the common names beach daisy, Cape beach daisy, South African beach daisy, coast capeweed, dune arctotheca, beach pumpkin, sea pumpkin, dune cabbage, and in South Africa, seepampoen, tonteldoek, and strandgousblom. This species is native to coastal areas of the Cape Provinces and KwaZulu-Natal in South Africa, and of Mozambique. It was introduced to Australia and is now a common weed of coastal areas in New South Wales, South Australia, Tasmania, Victoria, and Western Australia.
Dittrichia graveolens, commonly known as stinkwort or stinking fleabane, is a plant species in the sunflower family, native to southern Europe, North Africa, and western Asia as far east as Pakistan. It has become naturalized in California, Asia, Africa, Australia, and other places and is regarded as a noxious weed in some regions. It is a classified as an invasive species in California, and a potential threat to wine production in the state.
Cardamine douglassii, the limestone bittercress or purple cress, is a perennial forb native to the eastern and central United States as well as the province of Ontario in Canada, that produces white to pink or purple flowers in early spring.
Helianthus decapetalus, known by the common names thinleaf sunflower, thin-leaved sunflower, and woodland sunflower, is a perennial forb in the family Asteraceae. It is native to the Eastern and Central United States and Canada, from New Brunswick west to Iowa, Wisconsin, and Ontario, south as far as Georgia and Louisiana. It produces yellow composite flowers in late summer or early fall.
Dimorphotheca pluvialis, common names white African daisy, Cape marigold, weather prophet, Cape rain-daisy, ox-eye daisy, Cape daisy or rain daisy, is a plant species native to South Africa and Namibia. It is sparingly naturalized in scattered locations in California.
Arctostaphylos nortensis, common name Del Norte manzanita, is a shrub narrowly endemic to the mountains along the Oregon/California state line. It has been reported from only 3 counties: Del Norte County, California; and Curry and Josephine Counties in Oregon. The plant grows in chaparral and open forests at elevations of 400–600 m (1,300–2,000 ft), occasionally on serpentine.
Arctotheca prostrata is a plant in the family Asteraceae native to Namibia and the Cape Provinces of South Africa. Common names include prostrate Cape weed and creeping bear's-ear. It is listed as an invasive weed in California and Australia.
Deinandra kelloggii, Kellogg's spikeweed or Kellogg's tarweed, is a North American species of plant in the tribe Madieae within the family Asteraceae. It is native to Baja California, southern and central California, and Arizona.
