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" AGRICOLA consists of the Article Citation Database and NAL Catalog. Records in both data sets are updated daily. The NAL Catalog includes records for monographs, serials, technical reports, audiovisual items, and many foreign and domestic dissertations held by NAL and cooperating libraries."--Choice Reviews Online.
From the Choice review: "This virtual library of online floras offers resources from leading international institutions of botanical research, including the monumental Flora of China and the Flora of North America, which are also published in print. All the floras at this site, which is managed and hosted by the Missouri Botanical Garden, are accessible through a uniform interface, and can be searched by plant family, genera, and print volume number."
The most comprehensive database of tree species. "Scientists from Botanic Gardens Conservation International in the UK spent two years compiling the database, relying on information from 500 published sources and from local experts around the world" -- Fox News.
From the website: "PlantGDB is an NSF-funded project to develop plant species-specific EST and GSS databases, to provide web-accessible tools and inter-species query capabilities, and to provide genome browsing and annotation capabilities."
From the website: "Use Plant Information Online to discover sources in 1074 North American nurseries for 104779 plants, find 357757 citations to 161488 plants in science and garden literature, link to selected websites for images and regional information about 19131 plants, and access information on 2631 North American seed and nursery firms. Plant Information Online is a free service of the University of Minnesota Libraries."
"PubAg is an open-access resource from the National Agricultural Library (NAL) ... PubAg provides broad access to research produced by USDA research personnel, including some 40,000 full-text journal articles and citations to another 340,000 articles from various sources." -- Choice Reviews Online, 07/2015