A dune is a landform composed of wind- or water-driven sand. It typically takes the form of a mound, ridge, or hill. An area with dunes is called a dune system or a dune complex. A large dune complex is called a dune field, while broad, flat regions covered with wind-swept sand or dunes, with little or no vegetation, are called ergs or sand seas. Dunes occur in different shapes and sizes, but most kinds of dunes are longer on the stoss (upflow) side, where the sand is pushed up the dune, and have a shorter slip face in the lee side. The valley or trough between dunes is called a dune slack.
The Sonoran Desert is a hot desert in North America and ecoregion that covers the northwestern Mexican states of Sonora, Baja California, and Baja California Sur, as well as part of the southwestern United States. It is the hottest desert in both Mexico and the United States. It has an area of 260,000 square kilometers (100,000 sq mi).
Coastal strand is a plant community of flowering plants that form along the shore in loose sand just above the high tide line.
The perennial flower Abronia latifolia or Abronia arenaria is a species of sand-verbena known commonly as the coastal, or yellow sand-verbena. It is native to the west coast of North America, from southern California to the Canada–United States border.
Abronia umbellata is a flowering annual plant which is native to western North America. Other common names include beach sand verbena and purple sand verbena.
Abronia maritima is a species of sand verbena known by the common name red sand verbena. This is a beach-adapted perennial plant native to the coastlines of southern California, including the Channel Islands, and northern Baja California. It grows along stable sand dunes near, but not in, the ocean surf.
The Lower Colorado River Valley (LCRV) is the river region of the lower Colorado River of the southwestern United States in North America that rises in the Rocky Mountains and has its outlet at the Colorado River Delta in the northern Gulf of California in northwestern Mexico, between the states of Baja California and Sonora. This north–south stretch of the Colorado River forms the border between the U.S. states of California/Arizona and Nevada/Arizona, and between the Mexican states of Baja California/Sonora.
Abronia turbinata is a species of flowering plant in the four o'clock family known by the common name transmontane sand-verbena. It is native to eastern California and Oregon and western Nevada, where it grows in desert and plateau scrub.
Abronia alpina is a rare species of flowering plant in the four o'clock family known by the common names Ramshaw Meadows sand verbena and Ramshaw Meadows abronia. It is endemic to Tulare County, California, where it is known from only one area high in the Sierra Nevada.
Abronia pogonantha is a species of flowering plant in the four o'clock family (Nyctaginaceae) known by the common name Mojave sand-verbena. It is native to California and Nevada, where it grows in the Mojave Desert, adjacent hills and mountains, and parts of the San Joaquin Valley in the Central Valley.
A desert is a barren area of landscape where little precipitation occurs and, consequently, living conditions are hostile for plant and animal life. The lack of vegetation exposes the unprotected surface of the ground to denudation. About one-third of the land surface of the Earth is arid or semi-arid. This includes much of the polar regions, where little precipitation occurs, and which are sometimes called polar deserts or "cold deserts". Deserts can be classified by the amount of precipitation that falls, by the temperature that prevails, by the causes of desertification or by their geographical location.
Abronia ammophila, the Yellowstone sand verbena, or Wyoming sand verbena, is a plant unique to Yellowstone National Park lakeshores and is endemic to the park. Part of the "Four o'clock" family (Nyctaginaceae), the abronia ammophila is best suited in sandy soils and lake shores.
Abronia ameliae, commonly known as Amelia's sand verbena or heart's delight, is a species of flowering plant in the Four O'clock family, Nyctaginaceae, that is endemic to southern Texas in the United States. It inhabits grasslands in the deep sands of the Holocene sand sheet, which is part of the Tamaulipan mezquital. This species was named for Amelia Anderson Lundell, wife of Cyrus Longworth Lundell.
Abronia fragrans, the sweet sand-verbena, snowball sand-verbena, prairie snowball or fragrant verbena, is a species of sand verbena.
Tripterocalyx is a small genus of flowering plants in the four o'clock family, Nyctaginaceae. It contains four species formerly included in the closely related genus Abronia, the sand-verbenas. These plants are native to North America, especially the dry desert southwest of the United States. They bloom in heads of several colorful trumpet-shaped flowers. Sandpuffs or sand-verbenas are common names for plants in this genus.
Rotenoids are naturally occurring substances containing a cis-fused tetrahydrochromeno[3,4-b]chromene nucleus. Many have insecticidal and piscicidal activity, such as the prototypical member of the family, rotenone. Rotenoids are related to the isoflavones.
Abronia macrocarpa is a rare species of flowering plant known by the common name largefruit sand verbena. It is endemic to eastern Texas, where its current range is limited to Freestone, Leon, and Robertson counties. It inhabits harsh, open sand dunes on savannas, growing in deep, poor soils. It was first collected in 1968 and described as a new species in 1972. It is a federally listed endangered species of the United States.
Abronia, the sand-verbenas or wild lantanas, is a genus of about 20 species of annual or perennial herbaceous plants in the family Nyctaginaceae. Despite the common names, they are not related to Verbena (vervains) or lantanas in the family Verbenaceae. They are closely allied with Tripterocalyx.
Lupeol is a pharmacologically active pentacyclic triterpenoid. It has several potential medicinal properties, like anticancer and anti-inflammatory activity.
