Plant Medicinal

The word is today generally boundless to the green plants, which form an unranked clade Viridiplantae (Latin for "green plants"). This contains the flowering plants, conifers and other gymnosperms, ferns, clubmosses, hornworts, liverworts, mosses and the green algae, and rejects the red and brown algae. Historically, plants designed one of two kingdoms cover all living things that were not animals, and both algae and fungi were treated as undergrowth; however all existing definitions of "plant" exclude the fungi and some algae, as well as the prokaryotes (the archaea and bacteria).
There are about 300–315 thousand types of plants, of which the great mainstream, some 260–290 thousand, are seed plants (see the table below). Green plants afford most of the world's molecular oxygen and are the basis of most of Earth's ecologies, particularly on land. Plants that produce grains, fruits and vegetables form humankind's basic foodstuffs, and have been domesticated for millennia. Plants play many roles in culture. They are used as ornaments and, until recently and in great variety, they have served as the source of most drugs and drugs. The scientific study of plants is known as botany, a branch of biology.
Plants range in size from tiny duckweeds only a few millimetres in length to the giant sequoias of California that range 90 metres (300 feet) or more in height. There are an estimated 390,900 different species of plants known to science, and new species are repeatedly being described, particularly from previously unfamiliar tropical areas of the world. Plants evolved from aquatic families and have subsequently migrated over the entire surface of Earth, residing tropical, Arctic, desert, and Alpine regions. Some plants have kept to an aquatic habitat in either fresh or salt water.
The daily being of human beings is also directly inclined by plants. Plants furnish food and flavourings; raw resources for industry, such as wood, resins, oils, and rubber; fibres for the creation of fabrics and cordage; medicines; insecticides; and fuels. More than half of Earth’s people relies on the grasses rice, corn (maize), and wheat as their primary source of food. Apart from their commercial and aesthetic value, plants conserve other normal resources by protecting soils from erosion, by controlling water levels and superiority, and by producing a favourable air.