No, its not authoritative but its better than just because I said so. Although if youre good with because I said so then thats fine with me. At the West Side Market is my source for spices that they dont carry at the grocery store Urban Herbs. They do mail order from their site, by the way. They have an extensive selection of chile powders. If you dont want to click through to the large picture and read all those upside down labels yourself, that includes Ancho, Guajilla, Chipotle, Cayenne, Jalapeo, dArbol, Pasilla Negro, Aji Panca, New Mexico, Aji Amarillo, Amazon, Birdseye and Serrano. And all the way up in the top right corner is the chili powder. So, like I said a single pepper is chile powder, a blend of peppers and other spices is chili powder.