[DVF] Den Virtuella floran http://linnaeus.nrm.se/flora/welcome.html; Ett projekt vid Naturhistoriska riksmuseet (Stockholm, Sweden).; Even for non-Swedish speaker, the distribution maps on species are nice (map buttons "Norden" and "Norra halvklotet")
[FPN] Hitchcock & Cronquist, 1998
Flora of the Pacific Northwest (11th ed.); ISBN 0-295-95273-3
[GMB] Fernald, 1970
Gray's Manual of Botany (8th edition); A Handbook of the Flowering Plants and Ferns of the Central and Northeastern United States and adjacent Canada
[TSF] Eduard Thommen, 1951
Taschenatlas der Schweizer Flora
If you have corrections, comments or
information to add into these pages, just send mail to
Markku Savela
Keep in mind that the taxonomic information is copied from various sources, and may include many inaccuracies. Expert help is welcome.