Pondweeds Of Great Britain And Ireland

Over the past 50 years, major changes have taken place in the distribution of aquatic plants in Europe. Many species have declined whilst other species have increased in abundance or spread, including several that were originally introduced from the New World. Despite the relative richness of the aquatic flora of Britain and Ireland, it is a neglected area of study. This book is not an identification manual but provides a summary of the distribution, habitat and reproductive biology of 200 taxa in 72 genera, with individual distribution maps, and also summarizes their distribution overseas. A joint project of I.T.E. (now C.E.H.), the Joint Nature Conservation Committee and the Environment Agency.

Planned in five volumes, this new, critical Flora provides a definitive account of the native species, naturalized species, frequent garden escapes and casuals found in the British Isles. Full keys and descriptions should enable the botanist, researcher or informed amateur to name all plants occurring in the wild, plus some ornamental trees and shrubs. Detailed accounts of all the large apomictic genera are given and many infraspecific variants. Each species entry begins with the accepted Latin name, synonyms and the common English name. A detailed description follows, with separate descriptions being given for infraspecific taxa. Includes information on status, ecology and distribution. Clear black and white line drawings illustrate an extensive glossary and also illuminate the diagnostic features of a number of groups of plants.

Planned in five volumes, this new, critical Flora provides a definitive account of the native species, naturalised species, frequent garden escapes and casuals found in the British Isles. Full keys and descriptions should enable the user to name all plants occurring in the wild, plus some ornamental trees and shrubs. For the first time detailed accounts of all the large apomictic genera are given and many infraspecific variants included. Each species entry begins with the accepted latin name, synonyms and the common English name. A detailed description follows, with separate descriptions being given for infraspecific taxa. Information on status, ecology and distribution is also included. Clear black and white line drawings illustrate an extensive glossary and also illuminate the diagnostic features of a number of groups of plants.

Since its first publication in 1991, New Flora of the British Isles has become established as the standard work on the identification of the wild vascular plants of the British Isles. The Flora remains unique in many features, including its full coverage of all British wild plants, its user-friendly organisation, and its specially compiled keys and descriptions. This new edition includes the addition of more than 160 species, so that 4,800 taxa are now covered in varying degrees of detail. It also incorporates the new molecular system of classification based on DNA sequences. Furthermore, it includes 1600 species illustrations, rewritten distributions and an overhaul of the designation of degrees of rarity, with the introduction of a third, less rare, category. These revisions should ensure that this third edition remains the essential reference source for all taxonomists, ecologists, conservationists, plant hunters and biogeographers, whether they be researchers, teachers, students or amateurs.

Throughout British history rivers have been of profound economic, social and cultural importance – yet as we see with increasing frequency they have the potential to wreak great destruction. This book describes the natural and not-so-natural changes that have affected British rivers since the last ice age and looks at the many plants and animals that live along, above and within them. Detailed case studies of the Meon, Dee and Endrick illustrate the incredibly varied nature of our river ecosystems, and the natural and human factors that make each one different. Written by two widely respected river ecologists, the book looks not only at rivers as they were and are but also at how they can be managed and cared for. Full of interesting facts and stunning images, Rivers is essential reading for anyone professionally involved in rivers and for the naturalist, conservationist and layman alike. It is the one book you need to understand this singularly important and often contentious feature of the British landscape.