noun Date: 1742 any of several clematises (especially Clematis vitalba ) having plumose styles, a greenish-gray pendulous lichen ( Usnea barbata ) growing on trees
OLD-MAN'S BEARD
Meaning of OLD-MAN'S BEARD in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012