Horticultural Resources: Seed germination

Finding actionable information on seed germination is perhaps one of the most frustrating parts of exploratory horticulture.

It makes sense that species that don't even have a Wikipedia page will have sparse internet presence.  It also makes sense that difficult to find species will have an even harder time finding actual propagation instructions.  After all, germination information is an interactive thing - knowledge built upon knowing the plant even exists.

What is particularly frustrating however is the surprising lack of information what otherwise should be at least exist somehow.  But likely doesn't.  Germination information for Marula is more difficult to find than it has any right to be, but good luck finding anything on Willughbeia or Wrightia or Tamilnadia.

Over time, I've collected some internet resources that makes everything easier

Useful Tropical Plants: (by far the most pertinent)
http://tropical.theferns.info/

Kew (Royal Botanical Gardens), Seed Information Database: (second most useful)
http://data.kew.org/sid/sidsearch.html

Thompson & Morgan
http://www.ourgardengang.com/Seed%20Germination%20DB.htm
http://ourgardengang.tripod.com/Seed%20Germination%20DB.htm

Tom's Seed Germination Database:
http://tomclothier.hort.net/page02.html

Chilean Species:
http://www.chileflora.com/Florachilena/FloraEnglish/E_Germination.htm

USDA "'Seed Germination, Theory and Practice' by Norm Deno":
http://www.jlhudsonseeds.net/Germination.htm

The Seed Site:
http://theseedsite.co.uk/germination.html

Thymewilltell:
http://www.thymewilltell.com/seeds.html