Thuja occidentalis, also known as northern white-cedar, eastern white-cedar, or arborvitae, is an evergreen coniferous tree, in the cypress family Cupressaceae, which is native to eastern Canada and much of the north-central and northeastern United States. It is widely cultivated as an ornamental plant. It is not to be confused with Juniperus virginiana.
The western fence lizard is a common lizard of Arizona, New Mexico, California, Idaho, Nevada, Oregon, Utah, Washington, Northern Mexico, and the surrounding area. As the ventral abdomen of an adult is characteristically blue, it is also known as the blue-belly.
The western conifer seed bug, sometimes abbreviated as WCSB, is a species of true bug (Hemiptera) in the family Coreidae. It is native to North America west of the Rocky Mountains but has in recent times expanded its range to eastern North America, to include Ontario, New Brunswick, Nova Scotia, Michigan, Maine, Pennsylvania, New York, Connecticut, Massachusetts, and New Hampshire, and has become an accidental introduced species in parts of Europe and Argentina.
The western larch is a species of larch native to the mountains of western North America ; in Canada in southeastern British Columbia and southwestern Alberta, and in the United States in eastern Washington, eastern Oregon, northern Idaho, and western Montana. It is the most productive of the three species of larch native to North America.
Juniperus occidentalis, known as the western juniper, is a shrub or tree native to the Western United States, growing in mountains at altitudes of 800–3,000 meters (2,600–9,800 ft) and rarely down to 100 m (330 ft). It is listed as Least Concern on the IUCN Red List because it is a widespread species with an increasing population.
Cephalanthus occidentalis is a species of flowering plant in the family Rubiaceae that is native to eastern and southern North America. Common names include buttonbush, common buttonbush, button-willow, buck brush, and honey-bells.
Coptis trifolia, commonly known as the threeleaf goldthread or savoyane, is a perennial plant in the genus Coptis, a member of the family Ranunculaceae.
Cercis occidentalis, the western redbud or California redbud, is a small tree or shrub in the legume family, Fabaceae. It is found across the American Southwest, from California to Utah and Arizona.
Eriocoma occidentalis is a species of grass known by the common name western needlegrass. It is native to western North America from British Columbia to California, Colorado, and Arizona and in northeastern Mexico (Chihuahua), where it grows in many types of habitat.
Ageratina occidentalis is a species of flowering plant in the family Asteraceae known by the common name western snakeroot or western eupatorium. It is native to the western United States where it grows in several types of habitat. It is found in California, Oregon, Washington, Idaho, Montana, Nevada, and Utah.
Androsace occidentalis is a species of flowering plant in the primrose family known by the common name western rockjasmine.
Crepis occidentalis is a North American species of flowering plant in the family Asteraceae known by the common names western hawksbeard, or largeflower hawksbeard. It is native to western Canada and the western United States.
Castilleja occidentalis is a member of the genus Castilleja (paintbrush), commonly referred to as western Indian paintbrush. Like other members, it is a hemi-parasite.
Senna occidentalis, commonly known as coffee senna, styptic weed, or septicweed, is a species of flowering plant in the family Fabaceae and is native to the southern United States of America, Mexico and South America. It is a shrub with pinnate leaves, with three to seven pairs of broadly elliptic to egg-shaped leaflets, and yellow flowers arranged in groups of two to four, with six fertile stamens in each flower. It is an aggressive, pantropical weed.
Pogonomyrmex occidentalis, or the western harvester ant, is a species of ant that inhabits the deserts and arid grasslands of the American West at or below 6,300 feet (1,900 m). Like other harvester ants in the genus Pogonomyrmex, it is so called because of its habit of collecting edible seeds and other food items. The specific epithet "occidentalis", meaning "of the west", refers to the fact that it is characteristic of the interior of the Western United States; its mounds of gravel, surrounded by areas denuded of plant life, are a conspicuous feature of rangeland. When numerous, they may cause such loss of grazing plants and seeds, as to constitute both a severe ecological and economic burden. They have a painful and venomous sting.
Plantae preissianae sive enumeratio plantarum quas in australasia occidentali et meridionali-occidentali annis 1838-1841 collegit Ludovicus Preiss, more commonly known as Plantae preissianae, is a book written by Johann Georg Christian Lehmann and Ludwig Preiss.
Rumex occidentalis is a flowering plant species belonging to the family Polygonaceae. Commonly known as western dock, Rumex occidentalis can be found in parts of Western North America.
Triantha occidentalis, the western false asphodel, is a species of carnivorous flowering plant in the family Tofieldiaceae. It is found in the Pacific Northwest.
