Spanish moss

an epiphytic plant, Tillandsia usneoides, of the southern U.S., having narrow, grayish leaves and growing in long festoons that drape the branches of trees.

an epiphytic bromeliaceous plant, Tillandsia usneoides, growing in tropical and subtropical regions as long bluish-grey strands suspended from the branches of trees

a tropical lichen, Usnea longissima, growing as long trailing green threads from the branches of trees