Chile de arbol is pronounced cheel ay day ar boll. Chiles de arbol are narrow, curved chilies that start out green and mature to a bright red in colour. The arbol Chile is very hot, and is also related to the cayenne pepper. Be careful during preparation.Chile De Arbol Peppers are named in reference to the woody stems attached to the pod. The Spanish translation of the name means "treelike."These chillies register around 50,000-65,000 on the scoville heat unit scale (or about 7-8 on a 1-10 scale). The attractive brightness of these peppers makes them ideal for craft work such as chilli wreaths or ristras. For cooking, a few pods thrown into any dish will increase its heat level: use for chili, salsa, hot sauce, tacos, soups, stir fry, Thai curry.