As biologists have learned more about the physiology of plants, the biochemical reactions involved in their growth, maintenance, and reproduction, and in their genetic composition, it has proved necessary to rename the science of botany. The study of plants is no longer a single discipline, but a group of related disciplines that are known collectively […]

Tropical forests cover about 6 percent of the Earth's land area. It is difficult to be precise about the area, but in 2009 tropical forests of all types probably occupied approximately 7 million square miles (18 million km2). As well as rain forests, the Tropics support seasonal forest, dry forest, and mangrove forest, and all […]

In 1830 the American painter and author George Catlin (1796–1872) set off on a journey up the Mississippi River into Native American lands at the start of a diplomatic mission led by General William Clark (1770–1838). By 1836 Catlin had visited 50 tribes, and in the following two years he visited 18 more on a journey […]

People began to cultivate crop plants about 11,500 years ago in Southwest Asia and more recently in every other part of the populated world. At first, the early crops faced severe competition from wild plants, but in time the farmers overcame them, at least partially. It was not only their chosen plant species that the […]

There are certain words that everyone uses but that are exceedingly difficult to define precisely. Biodiversity is one such word: The term is a contraction of biological diversity, which seems simple enough. Obviously, it means the variety of living organisms that inhabit our planet. Unfortunately, the apparently simple definition leads to difficulties. If it refers […]

Ecology is now accepted as a scientific discipline in its own right, and there are professional ecologists. This is due in no small measure to the influence of another gifted teacher and writer, the English ecologist Arthur G. Tansley (1871–1955). Tansley always insisted on strict definitions, rigorous use of language, and learning about natural communities […]

The first textbook on plant ecology was published in 1895 in Copenhagen, Denmark, entitled Plantesamfund: Grundtraek af den okologiske Plantegeografi. It was translated into German in 1896 and again in 1902, into Polish in 1900, and into Russian in 1901 and again in 1903. It first appeared in English in 1909, published by the Clarendon […]

Tropical forests extend across a vast area of Central and South America, West and Central Africa, South Asia, and northern Australia. A belt of coniferous forest stretches across northern Canada and Eurasia. The North American prairies, South American pampas, and Eurasian steppe are temperate grasslands. It would be easy to suppose that a visitor might […]

Agriculture and commercial forestry have transformed the landscape over almost the whole of Europe. There are few areas of true wilderness remaining, and in an ecological sense the plant communities are not those that would have developed without human interference. Consequently, it is not easy to observe the way plants have adapted naturally to the […]

Braun-Blanquet and his colleagues founded one school of phytosociology, but there were others. Professor Teodor Lippmaa (1892–1943) established an Estonian school in 1934 at the University of Tartu, and its first task was to map the plant distribution throughout the country. This was completed in 1955. The plant communities were then grouped into associations on […]

Raunkiaer based his system on the way plants have adapted to climate. Other botanists were using a similar approach to classify large units of vegetation, and one of the most influential was the German botanist and plant geographer August Grisebach. Other European plant ecologists developed Grisebach's ideas. This led to the emergence of phytosociology as […]

In 1903 the Danish botanist Christen Raunkiaer proposed a solution to the difficult botanical problem of comparing plant communities with entirely different compositions. Raunkiaer's idea was to categorize plants by the position of their perennating buds—the plant structure with which a plant survives periods of adverse conditions. Raunkiaer believed that flowering plants first appeared in […]

Charles Darwin's theory of evolution by natural selection was first presented in the form of a paper read at a meeting of the Linnean Society in London on July 1, 1858. The meeting had been arranged hastily, following Darwin's receipt on June 18 of a paper by Alfred Russel Wallace (1823–1913) setting out an almost identical […]

It was Robert Hooke in the 17th century who first observed cells and gave them that name, but the German botanist Matthias Schleiden (1804–81) was the first scientist to appreciate their importance. All living organisms either consist of a single cell or are made up of cells, and organisms grow and reproduce by the division […]

The Lunar Society boasted several members of outstanding intellect, who quite cheerfully referred to themselves as lunaticks. Joseph Priestley was one, and another was Erasmus, the grandfather of Charles Darwin. Erasmus Darwin (1731–1802) believed that in the natural world species were constantly developing as they struggled to overcome the constraints imposed by their environment. He […]

In 1667 the German chemist Johann Joachim Becher (1635–1682) published a book called Physica Subterranea (Physics below ground), in which he revised the traditional view of the classical elements. Becher replaced the elements fire and earth with three alternative forms of earth to which he gave Latin names: terra lapidea, or “stony earth,” which was […]

In 1772 William Petty, the second earl of Shelburne (1737–1805), invited Joseph Priestley (1733–1804), with his wife Mary and their three children, to live on his estate near Calne, Wiltshire, where Priestley would work as Petty's librarian and tutor to his children. The Priestleys moved to the Shelburne estate the following year. That is where […]

On the surfaces of leaves there are small pores that open and close in response to the movements of two guard cells, one on either side of each pore. The pores are called stomata (singular stoma), and they are the openings through which the plant exchanges gases. Carbon dioxide enters the plant and is used […]

In 1665 the English physicist, instrument maker, and inventor Robert Hooke (1635–1703) published a book called Micrographia describing his researches using a microscope and illustrated by his own excellent and detailed drawings. Hooke's microscope has survived and is shown in the following illustration. It is now housed at the National Museum of Health and Medicine […]

Nehemiah Grew moved from Coventry to London partly to gain access to the microscopes owned by the Royal Society. Scientists recognized the value of these instruments, and Grew made extensive use of them. It was the Italian physician Marcello Malpighi (1628–94), however, who really pioneered the use of the microscope in the study of anatomy. […]

Scientists who aim to reconstruct past climates and environments make use of pollen—the mass of grains produced within the anther of a flower that carry the sperm. Every pollen grain has a tough protective coat that can survive in the soil for many years, and scientists are able to retrieve stored pollen grains from the soil […]

When early farmers first began to select the plants that they wished to grow, they chose individuals with certain characteristics. In the case of cereals, for example, they selected plants with a tough rachis and a large store of endosperm. In selecting for certain traits, farmers gradually altered the genetic constitution of their crop plants, and […]

Natural selection acts on differences that exist among the members of a species, and the concept of such variation is central to Darwin's evolutionary theory. The fact of variation among individuals creates classification problems, however, as taxonomists must decide whether the visible differences between two plants or animals are sufficient to justify classifying them as […]

In 1851 during one of his trips to Europe, Asa Gray (1810–88) visited Kew Gardens, where Joseph Dalton Hooker (1817–1911) introduced him to Charles Darwin. Hooker was director at Kew, and since 1842 Gray had been professor of natural history at Harvard University, where he devoted himself wholly to botany. He was the leading American […]

At his home, Down House, in Kent, Charles Darwin (1809–82) had a large garden that he loved and greenhouses in which he performed experiments. Although his evolutionary theory is most often discussed in its relation to animals, Darwin was every bit as interested in the evolution of plants. He used the way breeders modify animals […]

In 1822 a 21-year-old French botanist published a paper on the distribution and classification of fossil plants. This established the career path the young man would follow and that culminated with his most important work. This began with Prodrome d'une Histoire des Vegetaux Fossiles (Introduction to a history of fossil plants), published in 1828, followed by […]

Natural rubber is made from the latex exuded by a tree, Hevea brasiliensis. Latex is a milky fluid produced by some herbs and trees that may carry nutrients and may also help the plant to heal wounds. The rubber tree grows naturally in tropical South America, where people were using rubber long before the arrival […]

Cocoa is the most popular alternative drink to coffee and tea. It is made from the berries of a small tree (Theobroma cacao) that is native to tropical America and the islands of the Caribbean including Jamaica, which is the source of the first cocoa to reach Europe in 1698. The berries develop inside pods, […]

In the 15th and 16th centuries, wealthy Europeans dressed in rich fabrics dyed with bright colors, while ordinary folk were clad in dull grays and browns. Red was especially popular, not least because the dye, derived from the wood of the sappanwood tree (Caesalpinia sappan), was so expensive that sporting a red coat or gown […]

Coffee originated in Ethiopia. That is where the plants (Coffea arabica and other species) grow naturally, and it is where they were first cultivated. Ethiopians were the first people to drink coffee. According to legend, it all began with a goatherd called Kaldi who lived in the ninth century c.e., although it was not Kaldi […]

The founder of Zen Buddhism was a sage from southern India whose Sanskrit name was Bodhidharma, which means “teachings of the Buddha.” In China he is called Damo, and in Japan he is Daruma. The son of a Tamil king, Bodhidharma lived in the fifth or sixth century c.e. and became a Buddhist monk. He […]

In the late 18th century Sir Joseph Banks (1743–1820) was president of the Royal Society. For a time Banks had been the unofficial director of the Royal Botanic Gardens at Kew. He wielded considerable influence in political and scientific circles. Britain was establishing colonies in many parts of the Tropics, and there was much interest […]

No one knows who were the first people to wear clothes made from cotton or where they lived. Archaeologists have found traces of cotton fabrics dated at about 2300 b.c.e. in the ruins of Mohenjo-Daro. At that time the two cities of Mohenjo-Daro and Harappa, in the Indus Valley along what is now the border […]

Corn, also called maize (Zea mays mays), is a crop plant that originated in America. It is one of the approximately 10,000 members of the grass family (Poaceae), but it differs from the other cereal grasses in the extent to which the process of domestication altered it. These differences are so great that at one […]

Rice (Oryza sativa) is also a member of the grass family (Poaceae). Today it is the staple food for about half the world's population, with two major varieties, O. sativa indica and O. sativa japonica. Its many tiny flowers, known collectively as an inflorescence, have a complex structure with many branches. This is called a […]

Wheat is a type of grass that grows wild in the mountains of southeastern Turkey, and it was there, about 11,000 or possibly as much as 12,500 years ago, that people began to cultivate it. They had been collecting wheat grain from time immemorial, preferring einkorn (Triticum monococcum) and emmer (T. turgidum) wheats, but they […]

Life in a modern city or even a large town would be impossible were it not for the farmers who grow crops and the distribution and retailing systems that bring the food to the stores. It is agriculture that makes urban life possible, but it makes no sense to suggest that farming began in order […]

At Punta Arenas, in southern Chile, there is a botanical garden named in honor of one of the world's greatest botanical explorers. The Jardin Botanico “Carl Skottsberg” was founded in 1970, just a few years after the death of the Swedish botanist Carl Skottsberg (1880–1963). Early in his career, Skottsberg took part in a Swedish […]

In 1872 August Grisebach (1814–79), professor of botany at the University of Gottingen, Germany, published a two-volume work that greatly advanced the study of phytogeography. Its full title was Die Vegetation der Erde nach ihrer klimatischen Anordnung: Ein Abriss der vergleichenden Geographie der Pflanzen (The vegetation of the Earth according to its climatic distribution: A […]

The River Tees rises in the northern Pennines—a chain of hills that runs in a north-south direction down the center of northern England—flowing about 70 miles (113 km) to the North Sea. In the upper part of the valley, called Upper Teesdale, there is an unusual community of plants. The plants are not rare, but […]

Augustin de Candolle had traveled in Brazil, Indonesia, and northern China, and his observations convinced him of the importance of soil type in determining the way plants are distributed. In 1820 he wrote Essai elementaire de geographie botanique (Elementary essay on botanical geography), in which he elaborated on an idea that Linnaeus had proposed earlier. […]

Humboldt was generous in his support for young researchers and helped many at the start of their careers, but if he can be said to have had a favorite, that person was Franz Meyen (1804–40). When Humboldt first met him, Meyen was working as a physician. Humboldt secured for him the post of professor of […]

In 1788 when he was 19 years old and about to enroll at the University of Gottingen, Alexander von Humboldt met Karl von Willdenow (1765–1812), a 23-year-old medical student. Humboldt already had a keen interest in natural history and his meeting with Willdenow strongly encouraged it. Willdenow was learning medical botany, and his detailed studies […]

Alexander von Humboldt's exploration of South America, accompanied by the French botanist Aime Bonpland (1773–1858), did much to establish biogeography as a distinct scientific discipline, but Humboldt was much more than a geographer. In his most famous work, Kosmos, published in five volumes between 1845 and 1862, he wrote that “I always wanted . . […]

In April 1902 Ernest “Chinese” Wilson (1876–1930) arrived back in England from his first plant-collecting expedition. He brought with him 35 Wardian cases of plants, seeds of 305 plant species, and herbarium specimens of 906 species. Between 1899 and 1919, Wilson undertook five expeditions to China and three to other parts of the world, from […]

Until the middle of the 19th century, plant hunters traveling in distant lands were able to send samples home only by preserving them first. Insects had to be killed and pinned to cards, and plants pressed and dried to make herbarium specimens. It was possible to send plant seeds on journeys lasting many weeks or […]

The Chusan palm (Trachycarpus fortunei) is one of the very few palm trees that can survive in the cool, wet Scottish climate. For that reason, it is a fairly common sight in Scotland, especially in coastal resorts attempting to offer a taste of the exotic to city vacationers. The species was introduced to Scotland by […]

George Forrest (1873–1932) was one of the most successful plant hunters of the early 20th century. He undertook seven major expeditions to western China and returned to the Royal Botanic Garden Edinburgh more than 30,000 specimens of 10,000 plant species, of which 1,200 were new to science. Forrest was also one of the most adventurous […]

Rock gardens and the alpine plants that grow in them have been popular since the early years of the 20th century. They became fashionable following the publication in 1907 of My Rock Garden, a book that remained in print until about 1950. It was followed a year later by Alpines and Bog Plants. Both books were […]

The Douglas fir (Pseudotsuga menziesii) is a magnificent tree that occurs naturally in western North America from British Columbia southward to northern Mexico. It can grow up to 330 feet (100 m) tall and is one of North America's most valuable sources of timber. The tree can occur in dense stands in forests, but it […]

Rhododendrons have long been popular with gardeners. There are approximately 850 species in the genus Rhododendron. At least 26 species occur naturally in North America. The following illustration shows one of these, Catawba rhododendron (R. catawbiense). In China there are about 650 species and large numbers grow in the mountains of Nepal, Bhutan, and Sikkim. […]

In 1924 the German botanist Adolf Engler (1844–1930) published Syllabus der Pflanzenfamilien (Summary of plant families). In this work, Engler set out his own system of plant taxonomy. Many herbaria, field guides, and floras still use Engler's classification, and the 12th edition of this two-volume work, edited by H. Melchior and E. Werdermann, was published […]

Linnaeus developed the approach to classification that Tournefort had used, but he did not depart from its principles. Under the Linnaean system, plants were grouped together on the basis of similarities in their flowers—the number and arrangement of stamens. His system was easy to learn, so students liked it, but it was unnatural, and in […]

Most plants, though not all, have a name in the language of every country in which they occur naturally. In many cases they also have several local names. In addition, every plant known to science has an “official” or scientific name. This name is in Latin, by convention it is written in italic characters, and […]

A common plant is likely to have many names, but to avoid confusion it will have only one scientific name. The scientific name will be in Latin and it will have two parts, the first being the name of the genus and the second of the species. This use of two names to identify a […]

Its flower is the most obvious feature of most flowering plants. Many flowers have brightly colored petals. These attract pollinating animals. Plants such as grasses that are pollinated by wind have no need of petals, so their flowers are usually smaller and drab in color, but they are nevertheless prominent and clearly visible. However it […]

The Jardin Botanico Jose Celestino Mutis in Bogota, Colombia, is a research and scientific center and the country's largest botanic garden. It occupies 20 acres (8 ha) and specializes in Andean species, with greenhouses containing plants from every region of the country, including 5,000 species of orchids and the world's largest example of the giant […]

In 1778 a former Paris bank clerk published Flore Francaise (French flora) in three volumes. The work was an immediate success and, with the support and help of France's leading natural scientist, Georges- Louis Leclerc, comte de Buffon (1707–88), its author was appointed an assistant botanist at the Jardin du Roi, the royal botanical garden […]

Both Joseph Banks and George III died in 1820, and in the years following their deaths interest in the gardens waned and they came close to being abandoned. The new king, George IV (1762–1830), had little interest in them. The decline was arrested with the arrival of the first director, Sir William Hooker (1785–1865), in […]

Princess Augusta died in 1772. Her son, George III, inherited both Kew Gardens and Richmond Gardens, and in 1802 he joined them together. George III was keenly interested in agriculture and agricultural research—an enthusiasm that earned him the nickname “Farmer George”—and he turned part of the combined gardens over to raising sheep. During his reign […]

Britain's principal botanical garden occupies more than 300 acres (121 ha) beside the River Thames at Kew in southwest London. It became a botanical garden in 1752, so what is now the Royal Botanic Gardens, Kew, is of much more recent origin than most of Europe's botanical gardens and it is not the oldest botanical garden […]

The tulip originated in Turkey. It was introduced into Europe in the 16th century and became highly popular in the United Provinces (now the Netherlands). Growers discovered they could produce a wide range of varieties with many different colors, some a single but vivid red or yellow, some white, and some with more than one […]

Within a few decades, botanical gardens were opening elsewhere in Europe. The University of Leipzig, Germany, began work on its garden even earlier, in about 1542, but it opened later than the Italian ones. In about 1567 the University of Bologna converted its physic garden into a botanical garden. University administrators were recognizing that a […]

In 1544, the botanist Luca Ghini established Europe's first botanical garden in Pisa, Italy. Ghini was acting on the orders of Cosimo I de'Medici, the grand duke of Tuscany, who wished the garden to stock simplicia—plants with medicinal properties. The garden was linked to the University of Pisa, and is still: Its official title is […]

There was nothing novel in the practice of pressing and drying plants, especially flowers. The oldest example of a plant preserved in this way consists of the twigs and leaves of an olive tree (Olea europaea) made from a bundle of olive twigs bound together by cords made from palm leaves that was discovered in […]

Gardeners were often avid plant collectors. Highly competitive, they sought to impress their rivals by their displays of the latest fashions in plantings and of plants that had only recently arrived in their corner of the world. The landscaped gardens with which 18th-century landowners delighted their houseguests were often stocked with exotic trees, and the […]

During the 18th century there was a reaction against the excessively formal gardens to be found in the grounds of most European palaces and great houses. A more romantic approach became fashionable, and landowners sought to surround their homes with parkland that appeared natural. Rectangular beds and straight paths gave way to curved lines. A […]

The rising interest in plants was accompanied by a wish to cultivate them, and private gardens became increasingly popular from early in the 16th century. Borrowing the basic design of the medieval monastic garden, these gardens were usually walled and were tranquil places where people could relax, enjoying the shapes, colors, and perfumes of the […]

In 1622 Caspar Bauhin published Catalogus plantarum circa Basileam sponte nascentium (Catalog of plants occurring naturally around Basel). This slim book was a list of the plants growing around Basel. It contained no illustrations, but it listed all the synonyms for the plants it described and details of where each plant might be found, and alternate […]

People are very good at recognizing patterns, even where no pattern exists, and pattern recognition played an important part in early herbal medicine. When people rummaged through the meadows and along the hedgerows for plants that might heal their ailments, they saw similarities between plant forms and the part of the body that was sick. […]

In every major city there are annual events that mark the passing of the seasons. London is no exception, and one of its annual festivals attracts gardeners and garden enthusiasts from all over Britain. The Chelsea Flower Show is a celebration of garden design and plant breeding. The show takes place in a garden that […]

In the Middle Ages European monasteries and convents were centers of learning, and the monks and nuns also had a duty to care for the lay community outside the monastery walls. They provided shelter and hospitality for pilgrims and other travelers, schools for local children, and they cared for the sick. Most monasteries and convents […]

Herbals grew steadily longer in the course of the 16th century, and as they grew so did the number of omissions and inaccuracies they contained and repeated. There was only one way the situation could be remedied: Someone had to go through as many of the publications as possible looking for duplications, synonyms, and obvious […]

It is the custom for botanists to honor distinguished members of their profession by naming plants for them. The fuchsia is a popular ornamental shrub, grown for its flowers and as a hedging plant. The French botanist Charles Plumier (1646–1704) was the first European to discover it. In 1696–97 Plumier found it growing wild on […]

In 1653 Nicholas Culpeper (1616–54) published The Complete Herbal. It was the last of his works to be published in his lifetime, and he wrote the following explanation of how he felt obliged to offer an alternative to what he regarded as the unnatural and harmful treatments of his medical rivals. This not being pleasing […]

In the 16th and 17th centuries, barbers performed surgery as well as cutting hair and shaving men. The red-and-white barber's pole is believed to represent blood and bandages associated with their merged calling, and in Britain surgeons are still addressed as “Mr.” rather than “Dr.” This arrangement began in 1163, when a papal decree forbade […]

In 1578 a printer called Gerard Dewes, living at the Sign of the Swan in St. Paul's Churchyard, London, published a new herbal for which he claimed much. He advertised it as (with the original 16th-century spelling): A nievve herball, or, Historie of plantes: wherein is contayned the vvhole discourse and perfect description of all […]

A polymath is a scholar who is learned in a wide range of subjects, a kind of all-purpose expert. Conrad Gessner (1516–65) of Zurich, Switzerland, was one of the most remarkable polymaths the world has ever known. Some historians have described him as a one-man Royal Society, but during his own lifetime he was best […]

A modern field guide to plants or a book about the plants found in a particular region would sell rather few copies if it lacked illustrations. Modern photographic and printing technologies make it relatively simple to include colored illustrations, but this is a recent advance. Before the invention of photography and offset printing, an illustration […]

Herbalists need to be able to identify plants, and if they are to cultivate them they need to understand the environmental conditions their herbs require. They require the skills of the horticulturist to produce the raw materials from which their pharmaceutical skills allow them to concoct remedies. These are important skills, but they are not […]

Plants grow almost everywhere, many have therapeutic properties, and people of every culture treat their ailments with the herbal remedies they find around them. The peoples of the Americas are no exception, and when Europeans first arrived in Central America they found that the Aztec people were highly skilled practitioners of herbal medicine. The Spanish […]

Traditional Chinese medicine is based largely on herbs, and it has been practiced for a very long time—about 5,000 years. Chinese legend attributes its origin to an emperor who is thought to have lived from about 2737 b.c.e. to about 2697 b.c.e., probably not far from the city of Xian in what is now Shaanxi […]

In 1686, 1688, and 1704, the English naturalist John Ray (1627–1705) published the three volumes of Historia generalis plantarum (A general account of plants); each volume had approximately 1,000 pages. Ray was 59 and this was the culmination of his life's work, in which he attempted to classify plants. The book described more than 18,600 […]

Knowledge is fragile and easily lost. The books in the library at Alexandria were not bound volumes like those in modern libraries, but texts that were handwritten on scrolls of paper made from the papyrus plant (Cyperus papyrus), a type of sedge, and a long book might comprise several scrolls. Later texts, though not those […]

Aristotle taught Alexander (356–323 b.c.e.) before the prince inherited the throne of Macedon in 336 b.c.e. and began to extend the empire his father had won by conquest. Later, the garden at the Lyceum in Athens came to contain plants contributed by followers of Alexander's armies. Theophrastus based many of his plant descriptions on accounts […]

A pharmacopoeia (also spelled pharmacopeia) is a published list of medicines and other health care products. Modern pharmacopoeias list products that are authorized by the government for use. The term pharmacopoeia was first used in 1561 and came into general use early in the 17th century. Lists of recipes for making medicines from plant, animal, […]

So many plants possess medicinal properties, and combinations of ingredients from different plants generate yet more treatments, that a specialist worker preparing medicines or a physician prescribing them could not possibly remember them all. Medical workers need reference books listing recipes for medicines, descriptions of useful plants and their properties, and aids to diagnosis. For […]

In Uganda's Kibale National Park, scientists have observed chimpanzees (Pan troglodytes) searching for and then chewing the bark or leaves of plants that have very little nutritive value, but that local people use to relieve symptoms of malaria and diarrhea. The chimps also chew these plants when they are sick and they, too, use them […]

When Aristotle quit Athens for the last time, he left his friend and assistant Theophrastus (ca. 372–ca. 287 b.c.e.) to lead the Peripatetic school. In his will Aristotle bequeathed the Lyceum buildings and garden and his library to Theophrastus and made Theophrastus guardian of his children. Theophrastus was a popular teacher, some accounts claiming he […]

Aristotle (384–322 b.c.e.) was a Greek philosopher who lived at a time when most people believed in a world governed by gods, demigods, and other supernatural beings. According to tradition, in the distant past these beings had made the plants and the stories about how they did so are woven into the Greek myths. It […]

Surviving in such a harsh, hot, waterless place demands special adaptations in desert plants. Most have made elaborate adjustments to the lack of water. Many are halophytic, or salt tolerant, having evolved ways to handle loads of salt and minerals that would kill most plants. Many of the low-lying areas into which the wadis drain […]

Few plants can deal with the combination of heat, cold, and dehydration. Large areas in the shifting dune fields have only a handful of plants struggling to grow fast enough to avoid burial. In the low-lying areas that once held great lakes, only salt-tolerant halophytes can detoxify concentrations of salt and minerals that would cause […]

It is important to note that even after taking into account the effects of the Earth's wobble and the shift in summer temperatures, climate experts cannot account for the speed with which the grasses withered and the Sahara expanded. Blame the plants, concluded a team of German scientists led by Martin Claussen, which published its […]

The enormous array of plants native to Africa have always been a valuable resource for the continent's inhabitants. Africans use plants for food, medicine, fuel, paper, construction materials, and many other purposes. Some plants have been domesticated for agriculture; others are gathered in the wild. Africans have also adopted plants from other parts of the world, and a number of […]