Sri Lanka's Botanical Treasures

http://www.lankalibrary.com/

http://www.agroforestry.net/pubs/palmbk/Chapter3.html  (Palm)

http://www.freshwateraquariumplants.com/asiabiotope/srilanka.html 

http://www.galenfrysinger.com/rice_farming,_sri_lanka.htm  (rice, tea)

http://www.plantcultures.org.uk/index.html  (Almost all plants)

http://www.hort.purdue.edu/newcrop/morton/mango_ars.html#Blooming%20and%20Pollination

http://www.crfg.org/pubs/ff/mango.html  (Mango)

http://www.theepicentre.com/Spices/spiceref.html  (Encyclopedia of spices)