Richters lists both tree as same?? Am I reading this right??

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http://www.richters.com/Web_store/web_store.cgi?product=X4263 & cart_id=3412604.21151

Now isn't this confusing as heck. Am I just looking at this wrong this morning or does Richters seems to be saying that both species are the same in this link above to their catalog. I looked in the commercial section. They have both scientific names side by side in the listing as the same plant for $4.50 or whatever. I have never seen it this cheap. I am wondering whether they have made a mistake or what. Does anyone know what the mininum order is on trees like this???At this price, if its the right kind, one can afford to order a lot of trees. Would appreciate some comments

Elaine