http://journals.tubitak.gov.tr/botany
http://www.lib.berkeley.edu/EART/vegmaps.html
http://www.longitudebooks.com/find/p/2965/mcms.html
http://www.botany.com/
http://hortiplex.gardenweb.com/plants/
http://www.maskedflowerimages.com/plantinformation.html
http://plants.usda.gov/
http://www.neoflora.com/
http://www.hort.uconn.edu/plants/