Jeff, the question was asked why there wasn't a chart on this forum. The simple answer is that there isn't a chart detailing morphs because the people who are active on the forum prefer to keep and breed the variety that has evolved in nature across the numerous garter species. The keepers who are into producing morphs seem to me to just show up when they have something to sell or something new to show off. Personally, from what I've seen of the morph mentality in royal python breeding it destroys the interest in the hobby of the snakes themselves and turns the interest into "what cool colour can I get the babies of my snake to come out as".
Rather than bashing me and anyone else that would dare to voice the opinion that morphs aren't of any interest how about providing some useful information in answer to the original post? There must be information about morphs and I accept it is something that other people are interested in, unfortunately the people interested in it don't post regularly on this forum so their views are often not represented.