Vascular plants, also known as tracheophytes are any of various plants, such as the ferns and seed-bearing plants, in which the phloem transports sugar and the xylem transports water and salts. They also have (non-lignified) tissue to conduct products of photosynthesis. Vascular plants include the clubmosses, horsetails, ferns, gymnosperms and angiosperms. Scientific names for the group include Tracheophyta and Tracheobionta. Plant species are searchable by scientific and common name, including synonyms; known presence within a county; nomenclature citation information; availability of a herbarium specimen image; and listing as threatened/endangered, native, endemic, invasive, wetland and other characteristics. One possible mechanism for the presumed switch from emphasis on the haploid generation to emphasis on the diploid generation is the greater efficiency in spore dispersal with more complex diploid structures. The present book is a concise and up-to-date work including all aspects of this subject. Every effort has been made in the representation manner in this book so that the students do not get confused while going through this book.