The story of a nineteenth-century invention (essentially a tiny greenhouse) that allowed for the first time the movement of plants around the world, feeding new agricultural industries, the commercial nursery trade, botanic and private gardens, invasive species, imperialism, and more. Roses, jasmine, fuchsia, chrysanthemums, and rhododendrons bloom in gardens across the world, and yet many of the most common varieties have roots in Asia. How is this global flowering possible? In 1829, surgeon and amateur naturalist Nathaniel Bagshaw Ward placed soil, dried leaves, and the pupa of a sphinx moth into a sealed glass bottle, intending to observe the moth hatch. But when a fern and meadow grass sprouted from the soil, he accidentally discovered that plants enclosed in glass containers could survive for long periods without watering. After four years of experimentation in his London home, Ward created traveling glazed cases that would be able to transport plants around the world. Following a test run from London to Sydney, Ward was proven correct: the Wardian case was born, and the botanical makeup of the world’s flora was forever changed. In our technologically advanced and globalized contemporary world, it is easy to forget that not long ago it was extremely difficult to transfer plants from place to place, as they often died from mishandling, cold weather, and ocean salt spray. In this first book on the Wardian case, Luke Keogh leads us across centuries and seas to show that Ward’s invention spurred a revolution in the movement of plants—and that many of the repercussions of that revolution are still with us, from new industries to invasive plant species. From the early days of rubber, banana, tea, and cinchona cultivation—the last used in the production of the malaria drug quinine—to the collecting of beautiful and exotic flora like orchids in the first great greenhouses of the United States Botanic Garden in Washington, DC, and England’s Royal Botanic Gardens, Kew, the Wardian case transformed the world’s plant communities, fueled the commercial nursery trade and late nineteenth-century imperialism, and forever altered the global environment.

An explanation of how an invasive cactus from Mexico became a source of income in Africa While there are many studies of the global influence of crops and plants, this is perhaps the first social history based around a plant in South Africa. Plants are not quite historical actors in their own right, but their properties and potential help to shape human history. Plants such as prickly pear tend to be invisible to those who do not use them, or at least on the peripheries of people's consciousness. This book explains why they were not peripheral to many people in the Eastern Cape and why a wild and sometimes invasive cactus from Mexico, that found its way around the world over 200 years ago, remains important to African women in shacks and small towns. The central tension at the heart of this history concerns different and sometimes conflicting human views of prickly pear. Some accepted or enjoyed its presence; others wished to eradicate it. While commercial livestock farmers initially found the plant enormously valuable, they came to see it as a scourge in the early twentieth century as it invaded farms and commonages. But for impoverished rural and small town communities of the Eastern Cape it was a godsend. In some places it still provides a significant income for poor black families. Debates about prickly pear - and its cultivated spineless variety - have played out in unexpected ways over the last century and more. Some scientists, once eradicationists, now see varieties of spineless cactus as plants for the future, eminently suited to a world beset by climate change and global warming. The book also addresses central problems around concepts of biodiversity. How do we balance, on the one hand, biodiversity conservation with, on the other, a recognition that plant transfers - and species transfers more generally - have been part of dynamic production systems that have historically underpinned human civilizations. American plants such as maize, cassava and prickly pear have been used to create incalculable value in Africa. Transferred plants are at the heart of many agricultural systems, as well as hybrid botanical and cultural landscapes, sometimes treasured, that are unlikely to be entirely reversed. Some of these plants displace local species, but are invaluable for local livelihoods. Prickly Pear explores this dilemma over the long term and suggests that there must be a significant cultural dimension to ideas about biodiversity. The content of Prickly Pear is based on intensive archival research, on interviews conducted in the Eastern Cape by the authors, as well as on their observations of how people in the area use and consume the plant.

The key to preserving and managing biodiversity is understanding which processes are important at different scales, and how changes affect different components of biodiversity. In this book, existing theories on diversity are synthesised into a logical framework. Global and landscape-scale patterns of biodiversity are described in the first section. In the second, the spatial and temporal dynamics of diversity are emphasised. The third section develops an integrated set of mechanistic explanations for diversity patterns at the levels of population, community, ecosystem and landscape. Finally, case studies examine diversity patterns in marine and terrestrial ecosystems and the effects of biological invasions. The book concludes with a discussion of the economics of preserving biological diversity. This book will interest research workers and students of ecology, biology and conservation.

A presentation of strategies for managing woody plants and using research data to select the most appropriate control methods. It analyzes the responses of over 370 North American woody plants to commercially available herbicides. The authors provide methods to manage woody plants that interfere with recreation, watershed yield, animal and plant diversity, resource conservation, wildlife and livestock needs, and wood production on grazing, forest, and related land.