Hatch Chilies or Capsicum annuum

The dried Hatch chiles strung together are commonly called ristras.
A ristra is a traditional method of drying chile peppers by threading them on a string and hanging them, often seen in the southwest. While they're decorative, they're also functional—you can take chiles from the ristra for cooking once they've dried.
They’re especially iconic in places like Tucson, Arizona.