Tussah (aka Tassar) is a wild silk. Tussah moths have resisted domestication forever. You have to love that. Tussah is a warm tan colour, and has a bit more texture than Bombyx.
Muga is the Empress of Silk. From the Assam region of India, Muga has a beautiful golden colour that defies description.
Pedencal Tussah is the tussah from the pedencus (foot) of the cocoon. Rare and naturally brown.
Click on an image below to see more information on that yarn.