The lovely flowering plants we all enjoy today were not around when our planet was much younger. In fact, how we arrived at the current botanical diversity we enjoy today is a fascinating story, and begins at the very beginning of time. Here's a layman's quick explanation of how it all happened.
Flowering plants are called Angiosperms. Their origins are still one of the great mysteries of evolution. Fossil records indicate they appeared suddenly on the planet about 80 to 90 million years ago, beginning their rapid diversification in the mid-Cretaceous epoch. Today angiosperms are the most abundant and diverse plants on the earth.
Originally, plants were generated from spores, not seeds.
The spore process is called sporophtye generation. In this process two types of spores are produced: microspores whose cell structure germinate and develop into males and megaspores which develop into females. This divergent development itself is called meosis. Plants evolved over time through sexual reproduction from these initial processes. In short, very early plants had all they needed to reproduce themselves. More advanced "flowering plants" did not. With their emergence, a whole new grand design was needed, and it required "outside help."
The birds and the bees.
Because plants are, for the most part, stationary or "non-locomotive" (which means they stay in one place rather than roaming around like animals or insects), nature had to provide a mechanism whereby the male and female parts of newly-formed flowers could reach each other safely and successfully. This need resulted in the rise of the system of pollination or fertilization by birds and insects. Flowers evolved into the showy, colorful forms we know and love to attract these pollinators. Sweet nectar simply added to the allure. Now you know the origin of the phrase, "the birds and the bees".
Though they are not the original landscaping of the planet, the history of flowering plants is long.
Archaeological evidence shows that early man knew of seeds 50,000 years ago, since their discovery in a cave in Northern Iraq. Excavations in the Nile Valley have shown the remains of 25 different plants, including cattails, dating to over 17,000 years ago. Chemical analysis done on Egyptian fabrics dating to 1370 BC show the presence of dyes extracted from plants of the madder family. Flower gardening scenes are depicted on the bedroom walls in the palace of Amenhotop IV circa 1380 BC, Ramses III is recorded as having imported and naturalized foreign plants: "Gardens of vines, of trees, fruits and flowers are around thy temple and before thy face."
The Greek and Roman contribution to horticulture
began with Theophrastus (300 BC) who is today considered the "Father of Botany". A pupil of Aristotle, he was put in charge of the Athenian botanical gardens which resulted in his work, De historia plantarum, a compilation of observations regarding trunks, inner plant structures, roots, leaves and seeds. He described about 500 separate plants using these criteria.
The Roman, Pliny (23 BC), studied ornamental and wild-growing plants based on their utility citing them as a source of food for both bees and man, as well as their potential medicinal uses. Even earlier, Virgil had described 164 plants including vetch and lupine in 50 BC. In 50 AD, the Greek, Dioscorides, known today as the "Father of Medicinal Botany" described 650 different species.
The Medieval Herbalists.
While the early Middle Ages produced little in the way of scientific plant content, Christian monasteries did preserve the works of antiquity which was later expanded upon by the so-called Herbalists. In 1530 Jacob Brunfels published the Herbarium Vical Eicones. In 1542 Leonhart Fuchs wrote his famous herbal, De Historia Stirpium.