a blue-green alga (Nostoc flagelliforme) used as a vegetable in Chinese cooking
Tillandsia usneoides, a bromeliad; Spanish moss.
Used other than figuratively or idiomatically: see old, man, -'s, beard.
Clematis aristata, an Australian climbing plant.
Clematis vitalba, a climbing plant.
Chionanthus virginicus, a tree.
Usnea, a type of lichen.