Lepidium latifolium, known by several common names including perennial pepperweed, broadleaved pepperweed, pepperwort, or peppergrass, dittander, dittany, and tall whitetop, is a perennial plant that is a member of the mustard and cabbage family.
Lepidium campestre, the field pepperwort or field pepperweed or field cress, is usually a biennial with some form of annual plant in the Brassicaceae or mustard family, native to Europe, but commonly found in North America as an invasive weed. The most notable characteristic of field pepperweed is the raceme of flowers which forks off of the stem. These racemes are made up of first small white flowers and later green, flat and oval seedpods each about 6 mm long and 4 mm wide. Each seedpod contains two brown, 2.5 mm long seeds.
Lepidium virginicum, also known as least pepperwort or Virginia pepperweed, is an herbaceous plant in the mustard family (Brassicaceae). It is native to much of North America, including most of the United States and Mexico and southern regions of Canada, as well as most of Central America. It can be found elsewhere as an introduced species.
Lepidium draba, the whitetop or hoary cress, or Thanet cress, is a rhizomatous perennial flowering plant in the family Brassicaceae. It is native to western Asia and southeastern Europe and widely introduced elsewhere.
Helianthus bolanderi is a species of sunflower known by the common names Bolander's sunflower and serpentine sunflower. It is native to California and Oregon, where it grows mainly in mountainous areas, often in serpentine soils. It has been found from southwestern Oregon as well as in northern and central California as far south as Santa Cruz County, with reports of a few isolated populations in southern California.
Juncus capitatus is a species of rush known by the common names dwarf rush and leafybract dwarf rush. It is native to Europe, Asia and North Africa. It is also an introduced species in parts of North America such as California and the Gulf Coast. It grows in moist areas, such as wet sand, vernal pools, and ditches.
Kickxia elatine is a species of flowering plant in the family Plantaginaceae. It is native to Europe and Asia, but it is present on other continents as an introduced species, and sometimes a noxious weed. This is a small hairy herb with a trailing stem with many branches. It produces oval to arrowhead-shaped fuzzy leaves at wide intervals along the slender stem, and solitary snapdragon-like flowers borne on long, straight pedicels. Each flower is up to 1.5 centimeters long with a narrow, pointed spur extending from the back. The lobes of the mouth are yellow, white, and purple, and the whole flower is fuzzy to hairy, except for the flower stalk, which is more or less bare, in contrast to Kickxia spuria which has a hairy flower stalk. The fruit is a spherical capsule about 4 millimeters long.
Lepidium densiflorum is a species of flowering plant in the mustard family known by the common names common pepperweed and prairie peppergrass.
Lepidium flavum is a species of flowering plant in the mustard family known by the common name yellow pepperweed. It is native to California, Nevada, and Baja California, where it grows in the Sonoran and Mojave Deserts. The species epithet flavum is Latin for yellow and indicates its flower colour.
Lepidium fremontii, the desert pepperweed, is a species of flowering plant in the mustard family which is native to the southwestern United States, where it grows on sandy desert flats and the rocky slopes of nearby hills and mountains. It takes its scientific name from John C. Frémont.
Lepidium montanum is a species of flowering plant in the mustard family known by the common names mountain pepperweed, mountain peppergrass, mountain pepperwort, and mountain pepperplant. It is native to western North America from Oregon to Montana to northern Mexico, where it can be found in a number of habitats, often on salty or gravelly soils. There are several varieties, many of which are difficult to distinguish.
Lepidium nitidum, known by the common name shining pepperweed, is a species of flowering plant in the mustard family.
Lepidium oxycarpum is a species of flowering plant in the mustard family known by the common names forked pepperweed and sharp-fruited pepperweed.
Lepidium didymum, the lesser swine-cress, is a species of flowering plant in the family Brassicaceae.
Galium murale is a species of flowering plant in the coffee family known by the common names small goosegrass, yellow wall bedstraw and tiny bedstraw. It is native to the Mediterranean Basin of southern Europe and northern Africa, and the Middle East from Turkey and the Caucasus east to Iran and south to Saudi Arabia and Somalia. It is also considered native to the Canary Islands, Madeira and the Azores. It is naturalised in Australia, New Zealand, Argentina, Chile and California.
Lappula squarrosa is a species of flowering plant in the borage family known by several common names, including European stickseed, bur forget-me-not, bluebur, and bristly sheepbur. It is native to Europe and Asia, where it is common, and it is an introduced species in much of North America and Africa. It is well known as a noxious weed where it is naturalized and also in many parts of its native range. This is an annual herb producing an erect stem often with sprays of many long, bending branches, its form varying in different regions and climates. The plant may approach a meter in height. The stems are lined with linear to oval leaves up to 5 centimeters long and coated in whitish hairs, and the herbage emits a scent generally considered unpleasant. The inflorescence is a long, leafy raceme of tiny flowers near the ends of the branches. Each flower is 2 to 4 millimeters wide with five light blue corolla lobes. White-flowered plants are occasionally seen. The fruit is a cluster of four nutlets which are coated in hooked prickles. The seeds are dispersed when the prickles get caught on animal coats and human clothing, and when they are moved by wind.
Lepidium dictyotum is a species of flowering plant in the mustard family known by the common names alkali pepperweed and alkali pepperwort.
Lepidium pinnatifidum is a species of flowering plant in the mustard family known in English by the common name featherleaf pepperweed.
Pontia beckerii, the Becker's white, Great Basin white, or sagebrush white, is a butterfly in the family Pieridae. It is found in western North America from Baja California, Mexico to southern British Columbia, Canada.
Lepidium heterophyllum,, is a species of flowering plant in the mustard family which is native to parts of western Europe, growing in shingle banks, wasteland or cultivated fields.
