AOS http://orchidweb.org/
AOS http://orchidweb.org/linkindex.html

IPA http://www.phal.org/greenhouse_txt_index.htm
IPA http://www.phal.org/links.htm

RHS http://www.rhs.org.uk/
RHS http://www.rhs.org.uk/research/registration_orchids.asp
RHS http://www.rhs.org.uk/publications/pubs_journals_orchid_hybrid.asp

GENERA http://www.bgbm.fu-berlin.de/iapt/ncu/genera/Default.htm

Bedford Orchids http://bedfordorchids.com/