Princeton's WordNet

1. Spanish moss, old man's beard, black moss, long moss, Tillandsia usneoides(noun)

   dense festoons of greenish-grey hairlike flexuous strands anchored to tree trunks and branches by sparse wiry roots; southeastern United States and West Indies to South America

2. traveler's joy, traveller's joy, old man's beard, Clematis vitalba(noun)

   vigorous deciduous climber of Europe to Afghanistan and Lebanon having panicles of fragrant green-white flowers in summer and autumn

3. virgin's bower, old man's beard, devil's darning needle, Clematis virginiana(noun)

   common climber of eastern North America that sprawls over other plants and bears numerous panicles of small creamy white flowers