old man's beard (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.
old man's beard (Noun) — Vigorous deciduous climber of Europe to Afghanistan and Lebanon having panicles of fragrant green-white flowers in summer and autumn.
old man's beard (Noun) — Common climber of eastern North America that sprawls over other plants and bears numerous panicles of small creamy white flowers.