I thought I'd compile a thread on this topic to help weed out the confusion on the cultivars that are in discussion . Here are some links I found
www.angelfire.com/planet/dbotany/differences.htm From erowid
It has been estimated that there are over 200 Erythroxylum species growing in the Western Hemisphere. Only 17 species can be utilised for producing cocaine. Fifteen of the 17 species are not cultivated. In South America, two species and two varieties within each species are cultivated. They are:
E. Coca Species
variety coca
variety ipadu
E. Novogranatense Species
variety novogranatense
variety truxillense
These varieties are traditionally cultivated in the following areas:
Bolivia
E. Coca var. coca
Peru
E. Coca var. coca
E. Novogranatense var. truxillense
E. Coca var. ipadu
Colombia
E. Novogranatense var. novogranatense
E. Coca var. ipadu
E. Novogranatense var. truxillense
The most widely grown variety of coca is E. Coca, variety coca, which is cultivated on the eastern slopes of the Andes from Bolivia in the south to as far north as Ecuador. This area of the Andes has a tropical climate and experiences high amounts of rainfall. Coca in this region is usually grown between 1,650 and 4,950 feet in elevation. E. Novogranatense, variety novogranatense, thrives in the drier regions of Colombia and to a lesser extent Venezuela. It is also grown at lower elevations where the climate is generally hotter. The main variety of E. Novogranatense, variety truxillense, is grown up to an elevation of 4,950 feet.
The last variety, E. Coca, variety ipadu, is found in southern Colombia, northeastern Peru and western Brazil - in the Amazon basin. E. Coca, variety ipadu, is primarily cultivated by Indians. It is not an easy task, even for an expert, to readily distinguish between the different varieties of coca plants. One of the ways to identify the variety is to look at the leaves. Both varieties of E. Coca (E. Coca, variety coca and E. Coca, variety ipadu) have broadly elliptical shaped leaves. The leaf of variety ipadu has a rounded apex whereas the apex of variety coca is more pointed.
The leaf of variety coca is large, thick and dark green in colour. The leaf of E. Novogranatense, variety novogranatense is pale green with a rounded apex and is somewhat narrower and thinner than the leaf of variety ipadu and variety coca. E. Novogranatense, variety truxillense is very similar to variety novogranatenseexcept that it does not possess the lines parallel to the central vein of the leaf that are characteristic to so many varieties of coca plant.