Herba Atlas has been created to provide a generally available support tool for identification of weeds and acquiring knowledge on their most important properties. Herba is therefore intended for a wide range of users - universities, high school students, teachers, farmers, employees in the municipal sphere, gardeners, and many others. Works as a translation dictionary as well as explanatory dictionary.
This site provides links to on-line UK herbarium resources and contains lots of useful information. There are on-line gazetteers, a handwriting query page, systematic look-up lists (e.g. Kent's List of Vascular Plants of the British Isles) and a collaborative database which ultimately aims to combine the data from all UK and Irish herbaria.
To qualify as a hotspot, a region must meet two strict criteria: it must contain at least 1,500 species of vascular plants (> 0.5 percent of the world’s total) as endemics, and it has to have lost at least 70 percent of its original habitat.