| Plants For A Future |
 Plants for a Future is a resource centre for rare and unusual plants, particularly those which have edible, medicinal or other uses.
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| OSU Plant Dictionary |
 Plant Dictionary is an indexed system of teaching resources for the discipline of Horticulture and Crop Science. It was developed to complement the other electronic resources developed at Ohio State University.
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| OSU Factsheet Database |
 Over 20,000 pages of Extension fact sheets and bulletins provide a concentrated source of plant-related information for answering your questions or helping you teach others about plants.
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| The Harvard University Herberia |
 A huge selection of information, from a vast species database, publications and a range of collections.
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