What are native American masks made of?

You need to rephrase this question, there were many types of masks, made from Mud, cloth, cedar, redwood, pine, animal skins -- specifically what tribe are you interested?

sometimes grass or corn husk

Wood or metal. Sometimes with precious stones such as emerald.

No, Marijuana was a popular wild plant around Southern Cananda at the time but the Native American tribes in the area farmed it and smoked it during celebrations. They also cooked many of their meals...

They did. They used what they had available to use.