You can check out USDA-ARS service at Tropic Agriculture Research Station (TARS) for " Introduction, Increase, Maintenance, Evaluation and Distribution of Cacao Germplasm" ( http://www.ars.usda.gov/Research/docs.htm?docid=4371 ) and ask the staff there.

Yuan-Yeu Yau, thanks. However, there is a BIG difference between COCA and CACAO. I am searching for COCA.

Ok. Sorry about that. COCOA (or Cacao) is for chocolate, and COCA leaf extract is using for Coca-Cola product.

Hi. The BGCI (Botanic Gardens Conservation International) have a plant search. http://www.bgci.org/plant_search.php

You can check this and see if anyone has it growing?

JOHNSON and Al.  have studied many specimens of "truxillense" from Bolivia. Here you can find their full article: http://aob.oxfordjournals.org/content/95/4/601.full.pdf

Thank you Mauro. Much appreciated indeed. Honestly, I did not know truxillense existed in Bolivia. All papers I read says that it is from the Pacific coast.

Do you have by chance a picture of the plant and of the leaves? I would like to see a close-up picture of the leaves. my address: [email protected] or [email protected]

Thanks,

In the work that I linked there is the email address of the first author ([email protected]) I think the best thing is to write to him for further information.

  Personally I think it's doubtful the real possibility  to distinguish mere varieties (truxilense is not a subspecies) that should have no taxonomic significance, but only a little significant morphological difference, often not constant.

Thank you everyone for the help. I finally got in contact with someone from a Botanical Garden in Maryland and received pictures of the coca leaves. In particular, thank you Mauro for the advice.

Cheers,

Lidio

You can communicate with the colleague Aida Galindo ([email protected] , expert in the subject.