Epiphytic plant and Old man's beard

Epiphytic plant noun - Plant that derives moisture and nutrients from the air and rain; usually grows on another plant but not parasitic on it.

Old man's beard and epiphytic plant are semantically related. In some cases you can replace phrase "Old man's beard" with "Epiphytic plant", this phrases are similar.

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.

Epiphytic plant and old man's beard are semantically related. You can use "Epiphytic plant" instead a noun phrase "Old man's beard".